Dot Graphic VFD Module GU140x16J-7806A q 140x16 Dot Graphic (2x20 characters) The module includes the Vacuum Fluorescent Display glass, VF drivers q Single 5V Supply and micro-controller ICs with refresh RAM, character generator and q High Brightness Blue Green Display interface logic. The 4/8 bit parallel & serial bi-directional interfaces are q Operating Temp -40°C to +85°C 5V TTL/CMOS compatible. The command set is LCD compatible with q 3 Multi Sized Fonts extended graphic functions. CN3 – SERIAL INTERFACE q 4/8 Bit Parallel LCD & Serial Interfaces Pin Async SPI 1 VCC VCC Pin 1 CN2 CN3 Pin 1 CN6 Pin 1 2 NC SCK 3 RXD /SS 4 LINK1 SIN 5 GND GND 36.0 6 LINK2 SOUT 7 TXD NC CN1 43.0 18.8 8 /RES /RES Dimensions in mm & 9 MB MB subject to tolerances. 10 HB HB 7.7 Mounting holes Pin 1 NC = Do Not Connect 3.2mm dia. 17.6 102.75 CN1/2 - PARALLEL INTERFACE 3.5 Pin Sig Pin Sig 139.0 3.5 1 GND 2 VCC 146.0 3 NC* 4 RS 5 R/W 6 E 130.0 7 D0 8 D1 9 D2 10 D3 8.7 max. 11 D4 12 D5 1.6 13 D6 14 D7 Pin 3 can be changed to /RESET or 2.0 max. BUSY terminal and selectable by jumper J3 (2-3) or J3 (1-2) CHARACTER SET ELECTRICAL SPECIFICATION 5x7 & 10x14 Font L CD F o nt International Font Parameter Symbol Value Condition Power Supply Voltage VCC 5.0VDC +/- 5% GND=0V UDF1 Power Supply Current ICC 250mADC typ. VCC=5V UDF2 Logic High Input VIH 0.8xVCC min. VCC max. VCC=5V UDF3 Logic Low Input VIL 0VDC min 0.6VDC max. VCC=5V UDF4 Logic High Output VOH 3.5VDC min. VCC max. IOH=-10uA Logic Low Output VOL 0VDC min 0.6VDC max. IOL =4mA UDF5 OPTICAL and ENVIRONMENTAL SPECIFICATIONS UDF6 Parameter Value UDF7 Display Area (XxY mm) 102.75 x 18.8 UDF8 Dot Size/Pitch (XxY mm) 0.585 x 1.025 / 0.735 x 1.185 2 UDF1 Luminance 1000 cd/m Typ. Colour of Illumination Blue-Green (Filter for colours) UDF2 Operating Temperature -40°C to +85°C UDF3 Storage Temperature -40°C to +85°C UDF4 Operating Humidity (non condensing) 20 to 80% RH @ 25°C UDF5 SOFTWARE COMMAND SUMMARY UDF6 Instruction R/W RS D0-D7 Clear Display L L 01H UDF7 Cursor Return Home L L 02H UDF8 Entry Mode Set L L 04H-07H NOTE: UDF characters are available using 5x7 font only. Display ON/OFF L L 08H-0FH Proportional Mini Font Cursor Shift Left L L 10H Cursor Shift Right L L 14H Display Shift Left L L 18H Display Shift Right L L 1CH 20H (4Bit) / 30H (8Bit) + luminance Select 4/8 bit interface L L Display Luminance L H 00H – 03H (must follow above command) Set CG RAM Addr. L L 40H-7FH Serial / Parallel Selection CN1 Pin 3 Function Set DD RAM Addr. L L 80H-E7H J6 Interface J3 Font Read BUSY/Addr. H L 00H-FFH D7 Busy = High Open Sync Serial / Parallel (default) 2 & 3 / Reset Read Data from RAM H H 00H-FFH Link Asynchronous Serial 1 & 2 Busy Set Graphic Cursor L L F0H + xpos + ypos All J12 links & J6 should be open for Parallel Interface type (M68 / i80) Set Area Commands L L F1H + x1 + y1 + x2 + y2 + cmd parallel operation. J2 J4 Mode Signals where cmd 49H = Invert Area L H CONTACT 1-2 1-2 i80 Pin 5 = /WR, Pin 6 = /RD 46H = Fill Area L H Noritake Sales Office Tel Nos 2-3 2-3 M68 Pin 5 = R/W, Pin 6 = E 43H = Clear Area L H Nagoya Japan: +81 (0)52-561-9867 4FH = Set Outline Box L H SERIAL MODE Canada: +1-416-291-2946 6FH = Clear Outline Box L H J12 Configuration Chicago USA: +1-847-439-9020 Munchen (D): +49 (0)89-3214-290 Write Graphic Image L L F1H + x1 + y1 + x2 + y2 + cmd + data 3-4 1-2 7-8 Itron UK: +44 (0)1493 601144 Set Font / Spacing L L F2H + font style O O O 9600, N, 8, 1 Rest Europe: +49 (0)61-0520-9220 Set RS Low 0FH Serial Comms. only L O O 19200, N, 8, 1 www.noritake-itron.com Read Data FEH Serial Comms. only O L O 38400, N, 8, 1 Read Cursor Position FFH Serial Comms. only X X L Self Test Mode Subject to change without notice. Copyright 2008 Noritake Itron Corp. Japan IUK Doc Ref: 14409 Iss:1 05 Aug 08 NORITAKE ITRON VFD MODULES GU140x16J-7806A Dot Graphic VFD Module GU140x16J-7806A SOFTWARE COMMANDS Instruction Data Format (RS = 1) Description UDF Write 00H – 0FH Write user defined character 1-8 to the current cursor location on the display. Data Write 00H – FFH Write data to the display. In normal (LCD compatible) mode of operation, data is written to the display data (40us – LCD compatible mode) (DD RAM) or character generator (CG RAM). (250us – Graphic mode) When using the graphical data commands (F0H, F1H & F2H), data is written direct to the display and is not stored in DD RAM. Data write busy times will increase when using the graphic functions. Data Read 00H – FFH Read data from the display. In normal (LCD compatible) mode of operation, data is read from the display (40us – LCD compatible mode) data (DD RAM) or character generator (CG RAM). Instruction Data Format (RS = 0) Description Status / Cursor Position 00H - FFH D0 – D6 of read data corresponds to the current cursor position. D7 shows the status of busy. Read (40us – LCD compatible mode) Display Clear 01H Fills all locations in the display data (DD) RAM with 20H (blank character). The address counter is set to 0 in (150ms) the DD RAM. The address counter is set to increment on each data read/write. Any display offset (using the display shift command) is removed. Cursor Home 02H The address counter is set to 0 in the DD RAM. Any display offset (using the display shift command) is (500ms) removed. Entry Mode 04H – 07H Bit 1 is used to select the direction of the address counter on each data read or write. If set to ‘1’, the address (40ms) counter is incremented. If set to ‘0’, the address counter is decremented. Bit 0 enables the display to shift on each data read/write. If this bit is set to ‘1’, the display is shifted with the cursor. The display shift direction depends upon the address counter direction (bit1). If this is set to increment, the display is shifted left, if the address counter is set to decrement, the display is shifted right. Note: When display shift is enabled, the data write busy time can increase by 200us. Display Control 08H-0FH Bit 2 is used to enable or disable the display. If this bit is set to ‘0’ the VFD’s power supply is turned off to (50us) reduce power consumption. Bit 0 enables the flashing block cursor. Note: If the cursor is enabled, busy times can increase by 20us. Cursor Shift Left 10H Shift the cursor position (address counter) one position to the left. (40us) Cursor Shift Right 14H Shift the cursor position (address counter) one position to the right. (40us) Display Shift Left 18H Shift the display left, one character position. (150us) Display Shift Right 1CH Shift the display right, one character position. (150us) Select 4 bit interface 20H + lum (RS=1) Enables 4-bit communications. Data is received on DB4-DB7 only. Two writes are required to send one data (40ms) byte. The most significant nibble should be sent first. Refer to the ‘Parallel Communications’ section for more information. The lum value sets the displays brightness, and must be sent with the RS line high: - 00H = full brightness, 01H = 75%, 02H = 50% & 03H = 25%. Select 8 bit interface 30H + lum (RS=1) Enables 8-bit communications. Data is received on DB0-DB7. The lum value sets the displays brightness, (40ms) and must be sent with the RS line high: - 00H = full brightness, 01H = 75%, 02H = 50% & 03H = 25%. Set CG Address 40H – 7FH Set the character generator address (CG RAM). All written data is placed within the user definable character (40us) area. Set DD Address 80H – E7H Set the display data address (DD RAM). 80H – 93H = top line. C0H - D3H = bottom line. (40us) *Note Set Graphic Cursor F0H + xpos + ypos Set the absolute cursor position. xpos = 0 – 139, ypos = 0 – 15. (40us) Co-ordinates should be written with RS line set high. *Note F1H + x1 + y1 + x2 + y2 + cmd Set Area Area Commands: - ‘I’ - invert area, ‘F’ – fill area, ‘C’ = clear area, ‘O’ – set outline, ‘o’ – clear outline. (40us + 500us[cmd byte]) All area commands should be preceded with the area co-ordinates. X1 Y1 left top X2 Y2 bottom right. Co-ordinates, command and graphical data should be written with RS line set high. Write Graphic Image F1H + x1 + y1 + x2 + y2 + cmd Image Commands: - ‘H’ – write horizontal graphical data with horizontal cursor movement. ‘V’ – write vertical graphical data with horizontal cursor movement. ‘h’ – write horizontal graphical data with vertical cursor movement. ‘v’ – write vertical graphical data with vertical cursor movement. Graphical data should immediately follow the ‘H’,’h’,’V’ and ‘v’ commands. Co-ordinates, command and graphical data should be written with RS line set high. *Note Set Font F2H + font Select font type, font size and font spacing. (40us) Font commands: - ‘A’ or ‘a’ = proportional 64 character mini-font. ‘B’ = 5x7 LCD compatible font with Katakana characters. ‘C’ = 10x14 LCD compatible font with Katakana characters. ‘b’ = 5x7 international font with European characters. ‘c’ = 10x14 international font with European characters. ‘1’ = set the inter-character pixel spacing to 1 pixel. ‘2’ = set the inter-character pixel spacing to 2 pixels. Font command should be written with RS line set high. F4H + byte Port Configure Bit 7 High = I/O Port, Low = Serial Port. See extended port and serial commands. Read Port Status F5H The current port status is read with RS high. See extended port and serial commands. Port Out / Serial Send F6H + byte byte is output from the port. In serial mode check the busy status before sending again. Port In / Serial Read F7H The current port levels or buffered received data can be read with RS high. Port Buffer Send F8H + size + data Up to 128 bytes of data can be buffered before being transmitted from the serial port. Instruction Data Format Additional Serial Data Commands Set RS Low 0FH Set the RS line low for the following byte only. Used in serial communications only. Read Data FEH Read data at current cursor position. This command is used with serial communications only. Read Cursor Position FFH Read current cursor position. This command is used with serial communications only. Note: After these commands are executed, the cursor will be disabled and any character data will be written to the display only, and not the DD RAM. Any subsequent LCD compatible command will re-enable the cursor and allow for DD RAM writing. NORITAKE ITRON VFD MODULES GU140x16J-7806A Dot Graphic VFD Module GU140x16J-7806A GRAPHICAL DATA WRITES X1, Y1 X1, Y1 X1, Y1 X1, Y1 DATA MSB DIRECTION MSB DATA DIRECTION DATA DIRECTION MSB DATA DIRECTION MSB Vertical Data & Horizontal Vertical Data & Vertical Horizontal Data & Horizontal Horizontal Data & Vertical Movement Movement Movement Movement PARALLEL COMMUNICATIONS 8-Bit Data Write Timing Diagram. This module has a fast latching 8-bit data bus. The ‘RS’ and ‘R/W’ R/W control lines should be set prior to the rising edge of the ‘E’ enable line. Data is clocked in on the falling edge of the enable line. The busy line should be checked before sending data. RS >30ns >25ns I/O D0-7 E HOST GU140x16J-7806A >20ns >30ns SYSTEM I/O E I/O RS I/O R/W D0-D7 I/O BUSY GND VDD VDD GND <25ns tBUSY BUSY 8-Bit Data Read Timing Diagram. The busy state can be monitored on D7 when reading the DDRAM address (RS line low). The busy state can also be monitored directly from CN1 pin 3 if link J6 is set to 2&3. R/W >30ns RS >200ns E <65ns >50ns D0-D7 VALID The data bus width can be selected for 4-bit operation, using data lines I/O D4-7 D4-D7. Within this mode, two writes are required to send one data byte. HOST GU140x16J-7806A The high nibble (bits 4-7) should be sent first, followed by the low nibble SYSTEM I/O E I/O (bits 0-3). The busy state is not triggered between nibbles. It is RS I/O R/W important that the status is NOT read within 40us of sending the I/O BUSY GND VDD VDD GND command to set either 4 or 8 bit mode. 4-Bit Data/Command Write Timing Diagram. R/W RS >30ns >25ns >100ns >25ns E >20ns >20ns >100ns >100ns UPPER NIBBLE LOWER NIBBLE D4-D7 <120ns tBUSY BUSY NORITAKE ITRON VFD MODULES GU140x16J-7806A Dot Graphic VFD Module GU140x16J-7806A 4-Bit Data/Status Read Timing Diagram. R/W RS >30ns <250ns 100ns >250ns E >50ns >50ns >250ns >250ns UPPER NIBBLE LOWER NIBBLE D4-D7 Valid Valid ASYNCHRONOUS SERIAL COMMUNICATION Asynchronous & synchronous serial interfaces are provided at TTL level. Synchronous is enabled with parallel, first received byte disables the other. To enable Asynchronous Serial Mode connect pin 4 and 6 on CN2 (LINK1 and LINK2), Link J6 and enable i80 Mode on J2 and J4. When using Asynchronous serial communications, the module is automatically initialized at power-up/reset with the cursor enabled. Host to Module Write TXD RXD <20us tBUSY RXD TXD HOST RXD START D0 D1 D2 D3 D4 D5 D6 D7 STOP GU140x16J-7806A DTR HB SYSTEM CTS MB MB GND VDD VDD GND Module to Host Write TXD START D0 D1 D2 D3 D4 D5 D6 D7 STOP <200us The host busy line (HB) stops the module from sending data HB to the host. The use of the HB and MB lines are optional, and can be connected together if not required. SYNCHRONOUS SERIAL COMMUNICATION With synchronous communications enabled, data can be clocked into the VFD module on the rising edge of SCK, with the MSB sent first. The host must provide adequate delays for the module to process the data, these busy times are specified in the software command section. Alternatively the host can monitor the MB (Module Busy) line. >250ns >250ns >125ns <20us tBUSY SIN I/O I/O SOUT SCK HOST I/O SCK GU140x16J-7806A SYSTEM I/O /SS MOSI MSB LSB I/O MB GND VDD VDD GND MISO MSB LSB MB /SS The /SS pin can be used as an enable pin if other devices are connected to the serial line, and also allows byte synchronisation. >250ns >250ns The use of the /SS line is recommended, but can be permanently TTL Synchronous serial communication. pulled low if not required. SERIAL CONTROL An additional command has been included to distinguish between command and data writes when using serial communications. This command (0FH) will temporarily set the RS line low for the subsequent written byte. The following example displays two text messages using the serial communications and the ‘Set RS’ command: - CLEAR DISPLAY SET CURSOR DISPLAY TEXT 0FH 01H 0FH 80H ‘NORITAKE ITRON’ 0FH C0H ‘VFD MODULES’ Displaying text using serial communications. NORITAKE ITRON VFD MODULES GU140x16J-7806A Dot Graphic VFD Module GU140x16J-7806A LCD COMPATIBILITY This module features a command set that is LCD compatible, allowing easy replacement in existing equipment with little or no modifications. Careful consideration should be taken regarding the command execution times of this module. Although the commands can be executed within 40us, which is normal for LCD, busy times are increased when using the scroll write modes and with the cursor enabled. When using the 4-bit parallel mode, a 40us delay is required between nibbles. Also reading back data in 4-bit parallel mode is not supported. DD RAM address locations 70H+ are used to access the extended graphic commands. At power up and reset the module is automatically initialised and ready to receive data. The interface is set to 8-bit, the display is cleared, the cursor position is set to the top-left corner (DD RAM address = 00H), and the display luminance is set to 100%. RESET At power ON the modules internal reset requires at least 8ms before commands can be sent. Please check the busy status. If you connect pin 3 to the hardware reset using jumper 3, the module will require 3ms to re-ilitialize. Reset is achieved by high-low-high transition of at least 100ns. EXTENDED GRAPHIC COMMANDS Command Structure and Values Copyright 2007 Noritake Co Limited, Japan In addition to the standard LCD commands, this module includes additional commands to display graphical data, different font sizes, fill, clear and invert defined areas of the display. Also an outline command is available to draw rectangles around objects. When any of these extended commands are executed, the module will change to the ‘graphics’ mode of operation. This graphics mode allows text to be written to any part of the display. There are many differences the user should be aware of when the display is in this graphics mode: - Written data may require additional busy times. Text data is not written into the DD RAM and therefore can not be read back. Graphical text can not be shifted onto the display. The cursor is disabled & cursor direction is set to increment only. UDF characters cannot be written. T he graphics mode is disabled as soon as any valid LCD command is received. DISPLAYING GRAPHICAL TEXT 0,0 The module contains 3 font sizes, a proportional mini-font, 5x7 pixel, and a 10x14 pixel font. Graphical text can be written to any part of the display using the ‘Set Graphic Cursor’ command (F0H). Characters are positioned above the current cursor position. Each character written will include either a one pixel or two pixel space to the right side of the character. After each character is written to the display, the cursor position is automatically advanced. If the cursor position reaches the end of the display, the host must reposition to the next line. 0,7 6,7 The following example displays two text messages in the center of the display using the Cursor Positioning, example of writing 2 characters standard 5x7 character font. Command bytes that are underlined should be sent with RS from cursor position 0,7. line low. 5x7 FONT SET CURSOR DISPLAY TEXT F2H ‘B’ F0H 15H 07H ‘NORITAKE ITRON’ F0H 1FH 0FH ‘VFD MODULES’ Displaying text using the 5x7 font. The next example displays one line of text using the 10x14 character font. Command bytes that are underlined should be sent with RS line low. 10x14 FONT SET CURSOR DISPLAY TEXT F2H ‘C’ F0H 22H 0FH ‘140x16’ Displaying text in the large 10x14 font. NORITAKE ITRON VFD MODULES GU140x16J-7806A Dot Graphic VFD Module GU140x16J-7806A D ISPLAYING GRAPHICS Graphical images can be displayed on the VFD module in either a horizontal or vertical byte orientation. After each graphical data write, the cursor is automatically advanced. All graphical data is contained within the defined area. Unused bits are masked where the screen area is not a byte multiple MSB - 1CH - 5CH - 48H - 3EH The following example displays a simple graphical image. The graphical data orientation is - 1DH - 1DH set to horizontal data format, with a vertical cursor movement. Command bytes that are - 14H - 36H underlined should be sent with RS line low. Graphic Image using horizontal data AREA COMMAND AREA CO-ORDINATES HORIZONTAL FORMAT GRAPHIC DATA MSB F1H 30H 04H 37H 0BH ‘h’ 1CH 5CH 48H 3EH 1DH 1DH 14H 36H The next example displays a simple graphical image using a vertical data format, with a horizontal cursor movement. Command bytes that are underlined should be sent with RS line low. Graphic Image using vertical data AREA COMMAND AREA CO-ORDINATES VERTCAL FORMAT GRAPHIC DATA F1H 50H 00H 63H 0FH ‘v’ 00H 00H 00H 00H 07H 04H C7H FEH 72H 73H 32H 3EH 3FH 1DH 00H 00H 00H 00H 00H 00H 00H 3CH 42H 81H B9H C1H 42H 7CH 20H D8H FCH 3CH FCH CAH 49H B1H 89H 42H 3CH 00H Displaying graphic images in vertical and horizontal format. AREA COMMANDS The VFD module contains commands to fill, clear and invert defined areas of the display. Also an outline command is available to draw rectangles around objects. The following example displays three options for the user to select, each option is contained within a box with a shadow effect. Drawing horizontal and vertical lines using the fill area command creates the shadow effect. Command bytes that are underlined should be sent with RS line low. 5x7 FONT 1-PIXEL SPACING SET CURSOR DISPLAY TEXT F2H ‘B’ F2H ‘1’ F0H 0DH 0BH ‘SETUP’ F0H 36H 0BH ‘PRINT’ F0H 65H 0BH ‘RUN’ Display options with simple graphic text write. SET AREA TOP LEFT BOTTOM RIGHT OUTLINE F1H 0AH 02H 2CH 0CH ‘O’ F1H 33H 02H 55H 0CH ‘O’ F1H 5CH 02H 7EH 0CH ‘O’ Boxes created using the ‘Set Area Outline’ command. SE T AREA HORIZONTAL LINE FILL SET AREA HORIZONTAL LINE FILL F1H 0BH 0DH 2DH 0DH ‘F’ F1H 2DH 03H 2DH 0DH ‘F’ F1H 34H 0DH 56H 0DH ‘F’ F1H 56H 03H 56H 0DH ‘F’ F1H 5DH 0DH 7FH 0DH ‘F’ F1H 7FH 03H 7FH 0DH ‘F’ Drop Shadows created with the ‘Fill Area’ command. The next example uses the invert area command to select one of the options. SET AREA TOP LEFT BOTTOM RIGHT INVERT F1H 5DH 03H 7DH 0BH ‘I’ Option ‘Run’ selected with the ‘Invert Area’ command. NORITAKE ITRON VFD MODULES GU140x16J-7806A BYTE21 BYTE1 BYTE2 BYTE19 BYTE40 BYTE20 Dot Graphic VFD Module GU140x16J-7806A EXTENDED PORT AND SERIAL COMMANDS Command Structure and Values Copyright 2007 Noritake Co Limited, Japan The extended port and serial commands are only valid when the display is connected to the host using the parallel interface. PORT I/O MODE PORT CONFIGURE F4H + I/O The I/O mode gives direct access to the 7 control lines on the serial D7 D6 D5 D4 D3 D2 D1 D0 connector; HB, MB, TXD, RXD, MISO, MOSI and SCK. Each line can be 1 HB I/O MB I/O TXD I/O MISO I/O MOSI I/O RXD I/O SCK I/O individual set to an Input or Output using the ‘PORT CONFIGURE’ A ‘1’ defines the port as an input, ‘0’ an output. All ports are subsequently command. All inputs include an optional pull-up resistor, 30K-120K in set low. value. The outputs can source ~5mA and sink ~30mA. There are 3 commands available to configure port, set port level and read port state. PORT OUT F6H + OUT D7 D6 D5 D4 D3 D2 D1 D0 VCC - HB OUT MB OUT TXD OUT MISO OUT MOSI OUT RXD OUT SCK OUT Example: - A ‘1’ sets the corresponding port high, and a ‘0’ sets it low. If the port is LED1 LED2 F4H 82H - Set RXD to input and other ports to set to an input, a ‘1’ will enable the internal pull-up resistor. outputs. PORT IN F7H F6H 02H - Turn on LED1&2 by setting HB & MB HB low. Enable internal pull-up resistor on MB D7 D6 D5 D4 D3 D2 D1 D0 SW1 RXD. - HB IN MB IN TXD IN MISO IN MOSI IN RXD IN SCK IN RXD F7H - Read port, D1 is the switch state. GND The current port levels are read with RS high. SYNCHRONOUS SERIAL MODE PORT CONFIGURE F4H + SETUP This mode gives the ability to control external synchronous devices connected to the serial connector. Data is transmitted and received on D7 D6 D5 D4 D3 D2 D1 D0 each ‘PORT OUT’ command. The received data byte is buffered until 0 0 TXD OUT HNDSHK DEF H/L CLK EDGE SPEED1 SPEED0 the ‘PORT READ’ command is executed. The TXD port is set high with a ‘1’ and low with a ‘0’. Busy detection is enabled by setting HNDSHK to a ‘1’. The default clock level is high with The ‘PORT BUFFER SEND’ command will buffer up to 128 bytes of DEF H/L set to a ‘1’, low if ‘0’. The CLK EDGE is set to rising with a ‘1’, data prior to transmission; only the last data byte received is captured and falling with a ‘0’. The clock speed is set with the SPEED1/0 bits, 00=4Mhz, 01=1Mhz, 10=250kHz, 11=125kHz. when using this command. SERIAL SEND F6H + DATA The ‘PORT CONFIGURE’ command will set the MOSI & SCK lines to outputs, and the MISO line to an input. The HB line is used as an Data is transmitted to the synchronous serial port. If the ‘HNDSHK’ bit is optional busy input, and the MB line is set to an output. The TXD line is enabled, transmission will be delayed until the HB line is pulled low. also set to an output, and this can be used as a reset or device select control line. PORT BUFFER SEND F8H + SIZE + DATA A maximum of 128-bytes of data is buffered before transmission to the The serial transmission is defined by the ‘DEF H/L’ (default clock level synchronous serial port. If the ‘HNDSHK’ bit is enabled, transmission is high or low), ‘CLK EDGE’ (rising or falling clock edge), and the ‘SPEED’ delayed until HB line is low. (clock speed) control bits. The ‘HNDSHK’ bit is used to detect the status READ PORT STATUS F5H of the HB line prior to data transmit. All data is transmitted MSB first. D7 D6 D5 D4 D3 D2 D1 D0 - - - HB IN TX PEND TXC RXC - A ‘STATUS READ’ command can be used to check for completed data transmission. The current port status is read with RS high. TX PEND shows data is pending for transmission, TXC transmission completed, and RXC shows data received. HB IN shows the current state of the ‘HB’ line. TXC is Example: - cleared after status read. F4H 1BH - Enable Synchronous mode with busy test; clock speed to 125kHz, data clocked on falling edge, default clock level is low. SERIAL READ F7H F6H 55H - Send byte 55H to synchronous port when HB line is low. The currently buffered data byte can be read with RS high. The host F5H - Read current status. Wait until TXC is set. should first check the RXC bit using the PORT STATUS command. After F5H - Read current status. Check if RXC is set. reading the data byte, the RXC bit is cleared. F7H - Read received byte. F8H 16H “This is a test string.” - Send character string when HB line is low. F5H - Read current status. Wait until TXC is set. NORITAKE ITRON VFD MODULES GU140x16J-7806A 7806A Dot Graphic VFD Module GU140x16J-7806A ASYNCHRONOUS SERIAL MODE This mode gives the ability to control external asynchronous devices PORT CONFIGURE F4H + SETUP connected to serial connector. Data is transmitted on each ‘PORT OUT’ D7 D6 D5 D4 D3 D2 D1 D0 0 1 MISO OUT HNDSHK PARITY1 PARITY0 BAUD1 BAUD0 command. Data received is held within a 1 byte buffer until the ‘PORT READ’ command is executed. The MISO port is set high with a ‘1’ and low with a ‘0’. Busy detection is enabled by setting HNDSHK to a ‘1’. The parity is set with the PARITY1/0 The ‘PORT BUFFER SEND’ command will buffer up to 128 bytes of bits, 00=none, 10=even & 11=odd. The baud rate is set with the data prior to transmission. BAUD1/0 bits, 00=4800, 01=9600, 10=19200 & 11=38400. SERIAL SEND F6H + DATA The ‘PORT CONFIGURE’ command will set the TXD & MB lines to Data is transmitted to the asynchronous serial port. If the ‘HNDSHK’ bit is outputs, and the RXD line to an input. The MISO line is also set to an enabled, transmission will be delayed until the HB line is pulled low. output, and this can be used as a reset or device select control line. The HB line is used as an optional busy input. The MB line mirrors the RXC PORT BUFFER SEND F8H + SIZE + DATA status flag, and indicates that data has been received. A maximum of 128-bytes of data is buffered before transmission to the asynchronous serial port. If the ‘HNDSHK’ bit is enabled, transmission is A ‘STATUS READ’ command can be used to check for completed data delayed until HB line is low. transmission. READ PORT STATUS F5H Data Write Example: - D7 D6 D5 D4 D3 D2 D1 D0 - - - HB IN TX PEND TXC RXC RX ERR F4H 5AH - Enable Asynchronous mode with busy test; set interface to 19200E. F6H 55H - Send byte 55H to asynchronous port when HB line is low. The current port status is read with RS high. TX PEND shows that data is F5H - Read current status. Wait until TXC is set. pending for transmission, TXC transmission was completed, and RXC F6H AAH - Send byte AAH to asynchronous port when HB line is low. shows data has been received. RX ERR indicates a received parity, overrun or framing error. HB IN shows the current state of the ‘HB’ line. F8H 16H “This is a test string.” - Send character string when HB line is low. The TXC bit is cleared after status read. F5H - Read current status. Wait until TXC is set. SERIAL READ F7H Data Read Example: - The currently buffered data byte can be read with RS high. The host should first check the RXC bit using the PORT STATUS command. After F5H - Read current status. Repeat until RXC is set. reading the data byte, the RXC bit is cleared. F7H - Read received byte. NORITAKE ITRON VFD MODULES GU140x16J-7806A