High-Density Digital I/O and Timer for StackableUSB™ USB3148 Features 9 53 user controllable TTL-level I/O lines 9 Timers/counters, switches/LEDs 9 10-bit single-ended/differential A/D 9 Two (2) RS232 serial ports, one (1) each I2C and SPI bus interfaces 9 StackableUSB 2.0 device with stacktogether connectors for embedded systems or plug/cable configuration for remote applications The USB3148 operates as a USB 2.0 Full- added into any USB system by using the speed device in a StackableUSB system or standard USB plug-and-play hardware and connected to a PC using a standard USB software configuration after installing the cable. Three (3) 82C55’s provide 53 lines of software provided for the host computer. bi-directional general system I/O. An on- This significantly simplifies user’s system board 82C54 provides three (3) integration. counter/timers. There are also two (2) The USB3148 implements many features to RS232 serial ports, one (1) each I2C and enhance system reliability. Software SPI bus interface, a single comparator, and programmable pull ups/downs on each I/O a 10-bit A/D converter. The USB3148 line provide deterministic reset levels. The provides this wealth of system I/O on a small USB3148 protects against power 3.55 x 3.755 footprint. sequencing issues with other boards in the The USB interface, in the stackable or cable stack or system by providing current limiting configuration, allows the USB3148 to be resistors on all I/O lines. Software Support Compatible Hardware Mounting/Packaging Windows XP StackableUSB Host single board ENC104-4 Windows CE computers or microcontrollers Standoffs, STDOFFUSB Linux PC Host desktops and laptops 82C55 82C55 AD C8051F340 82C54 MCU 82C55 LEDs Switches Technical Details: Three (3) 82C55 digital I/O devices provide 53 the communication channel between the on- lines of TTL I/O. Direction of the I/O signals is board peripherals and the StackableUSB programmable in two (2) 8-bit groups and two host computer. The USB3148 is USB 2.0 (2) 4-bit groups for each 82C55. The 82C55 compliant and supports both full-speed TTL I/O lines can source and sink at 2.5mA. An (12Mbps) and low-speed (1.5Mbps) transfer on-board 82C54 devices provides three (3) 16- rates. bit timer/counters. Other peripherals coming from the The USB3148 comes with pre-installed microcontroller include a single-ended or software that allows the transfer of data differential input A/D with a range of 0 to between the USB port and all of the on- 3.3V. Conversions can be triggered from board peripherals with no need to write timers or from an external pin. There are two additional code on the USB3148 device side (2) serial ports, COM1 and COM2, of the system. To ease installation of the configured with RS232 transceivers with the USB3148 on the host side, USB drivers and TXD and RXD lines supported. Other example source code are supplied, system level functions included on the eliminating the need for prior USB USB3148 are an interrupt controller and a experience. Host side operating systems watchdog timer. supported are Linux, WindowsCE, and Windows XP. The on-board microcontoller includes 64k of flash, and 4352 bytes of SRAM which allows A command and control protocol users to write board specific control routines implemented over the USB interface allows for the USB3148. Most instructions are direct communication with the on-board executed in one or two system clock cycles, peripherals via inport and outport driver calls allowing the MCU to achieve performance as executed on the host computer. A custom high as 48 MIPS. This feature can off load interrupt service routine can be called the host CPU of interrupt service routines, directly by the host side USB driver. The reserving the USB communication link for USB3148 utilizes a microcontroller with a sending system level commands rather than built-in USB device controller which acts as directly controlling each event. StackableUSB TIMERS COM1-2 DIO The StackableUSB bus architecture allows Analog Input: up to five (5) USB peripheral boards to be ‰ 10-bit resolution, successive- stacked above and/or below a single board approximation register ADC computer, making ten (10) board systems ‰ 0 to 3.3V range with any combination of StackableUSB ‰ Conversion starts from timer or external pin boards possible without the use of a hub. ‰ 200ksps Please call Micro/sys Technical Sales for ‰ Single-ended or differential inputs details. Watchdog Timer: ‰ Program must refresh watchdog timer Specifications: periodically, or system will be reset ‰ Enabled through software Mechanical: ‰ PC/104 mounting holes Debug/Download Interface: ‰ 3.55” (plus I/O region) x 3.775” x .6” ‰ Silicon Laboratories 2-wire C2 interface ‰ Allows programming of program flash or Power Requirements: debugging of user application ‰ +5v ±5% at 320mA max Digital I/O: Environmental: ‰ Three (3) 82C55s provide 53 lines of ‰ Operating range 0°C to +70°C TTL-level digital I/O, 2.5mA source/sink ‰ ET-version operating range -40° to +85°C ‰ Software-configurable pull up/downs on ‰ -40° to +85°C storage I/O for initialization after reset ‰ 5%-95% relative humidity, non-condensing ‰ 470-ohm current limiting resistors ‰ Grounds for all systems Microcontroller Core Section: ‰ Silicon Laboratories 8051 Timer/Counter: ‰ 48MHz clock rate ‰ 82C54 provides three (3) 16-bit ‰ Optimized 8051 instruction set timer/counters ‰ 64kbytes of flash memory ‰ Software-configurable in/external clock ‰ 4352bytes of SRAM and cascading USB Interface: Switch/LEDs: ‰ USB 2.0 full-speed ‰ 8-position switch, eight (8) LEDs from ‰ USB device or function controller only dedicated 82C55 (Controller does not operate as a host) External Connections: Serial Ports: ‰ 14-pin header for COM1-COM2 ‰ Two (2) async serial ports ‰ 80-pin high density connector for digital I/O ‰ RS232 levels ‰ 26-pin header for timer, external-clock, ‰ TXD and RXD signals supported for external IRQ, additional digital I/O both ports ‰ 10-pin header for debug/download ‰ 34-pin header for MCU signals (ADC, SMBus/I2C Port: timers, DIO, I2C, comparators) ‰ Configurable as master or slave ‰ 2-pin removable terminal strip for power ‰ Clock speeds up to 4.8MHz Development Kit: SPI Bus: ‰ Base module ‰ Single-master, single-slave only ‰ Complete cable set ‰ Clock speeds up to 12.5MHz ‰ Documentation, schematics, sample software Ordering Information: Development Board Kits* . OEM Modules: DK3148-ST-ET High-Density DIO and Timer board with StackableUSB USB3148-ST High-Density DIO and stackthrough connector, Timer board with -40° to +85°C operating StackableUSB temp, Windows-ready stackthrough connector development kit USB3148-ST-ET High-Density DIO and Timer board with DK3148-PC-ET High-Density DIO and Timer StackableUSB stack- board with Mini-B USB through connector; connector for PC connection; -40° to +85°C -40° to +85°C operating operating temp, Windows- temperature ready development kit USB3148-PC High-Density DIO and *See Development Kit Specifications Timer board with Mini-B USB connector for PC connection USB3148-PC-ET High-Density DIO and Timer board with Mini-B USB connector for PC connection; -40° to +85°C operating temperature CS3148 Complete cable set Related Products: CA4089 Breakout cable to two (2) DB9 COM port connectors BA4089 Breakout assembly to two (2) DB9 COM port connectors TB50540 40-pin to 40-pin ribbon cable with 50-point screw terminal breakout board BA0034 34-pin to 34-pin ribbon cable with 34-point screw terminal breakout board BA0028 26-pin to 26-pin ribbon cable with 26-point screw terminal breakout board CA5049 50-pin to 50-pin ribbon cable CA5050 34-pin to 34-pin ribbon cable CA5051 26-pin to 26-pin ribbon cable Cables nominally 15”, other lengths available