CoreFROM Product Summary Contents Intended Use General Description ................................................... 1 • Intended for Use in a Processor-Based Subsystem Connecting CoreFROM in CoreConsole .................... 2 to Access On-Chip FROM in the Memory Map Programmer’s Model ................................................. 2 Resource Requirements ............................................. 3 Ordering Information ................................................ 3 Key Features List of Changes ........................................................... 3 Supplied in SysBASIC Core Bundle Datasheet Categories ................................................. 3 Tiny Area Access FROM Memory from Software Benefits General Description Allows FROM to Appear in Your Memory Map CoreFROM is an APB slave that provides a means to (read only) access the 128-byte FROM available in Fusion, IGLOO, Auto Stitch CoreFROM in CoreConsole for Rapid ProASIC, and ProASIC3E devices. Development If you want to access the on-chip FROM, add CoreFROM Compatible with AMBA, CoreMP7, and to your design and connect it to the APB Bus. Aside from Cortex™-M1 the connections to the APB Bus, there are two other ports on the component. These are named FROMAddr (7-bit FROM address bus) and FROMData (8-bit FROM Supported Device Families data bus) and should be routed to the top-level of your Fusion subsystem design in CoreConsole for subsequent ® connection to an FROM instance. IGLOO Use the SmartGen core generator, available in Libero IDE, toIGLOOe ® generate an FROM instance and to set the values to be ProASIC 3L programmed into the FROM. ProASIC3 More information on using the FROM on Actel devices ProASIC3E can be found in the "FlashROM in Actel’s Low Power Flash Devices" chapter of any FPGA fabric user’s guide, such as the IGLOO FPGA Fabric User’s Guide. Synthesis and Simulation Support ® Supported in the Actel Libero Integrated Design Environment (IDE) Verification and Compliance Compliant with AMBA January 2008 v2.1 1 © 2008 Actel Corporation CoreFROM Connecting CoreFROM in CoreConsole Table 1 lists the ports present on the CoreFROM and describes how to connect these in CoreConsole. Table 1 • FROM Access Connections Connection CoreConsole Label Description Required Connections APB Slave Interface APBslave Connect this interface to any available slave slot on the APB Bus. FROM Address Bus FROMAddr 7-bit FROM address bus This port should be connected to the subsystem top level for subsequent connection to an FROM instance. FROM Data Bus FROMData 8-bit FROM data bus This port should be connected to the subsystem top level for subsequent connection to an FROM instance. The data stored in the FROM is read only and cannot be Programmer’s Model changed by the processor. When CoreFROM is connected to the FROM Access The FROM data can only be accessed one byte at a time; component, the contents of the FROM appear at the it is not possible to read a word or half-word of FROM base address of the APB slot where CoreFROM Access data in one step. component is located. The FROM contents are also Table 2 shows how the FROM data appears to the aliased throughout this APB slot. processor. Table 2FROM Data Offset Data Base address + 0x00 Byte 3 Byte 2 Byte 1 Byte 0 Base address + 0x04 Byte 7 Byte 6 Byte 5 Byte 4 Base address + 0x08 Byte 11 Byte 10 Byte 9 Byte 8 Base address + 0x0C Byte 15 Byte 14 Byte 13 Byte 12 Base address + 0x10 Byte 19 Byte 18 Byte 17 Byte 16 Base address + 0x14 Byte 23 Byte 22 Byte 21 Byte 20 Base address + 0x18 Byte 27 Byte 26 Byte 25 Byte 24 Base address + 0x1C Byte 31 Byte 30 Byte 29 Byte 28 Base address + 0x20 Byte 35 Byte 34 Byte 33 Byte 32 Base address + 0x24 Byte 39 Byte 38 Byte 37 Byte 36 Base address + 0x28 Byte 43 Byte 42 Byte 41 Byte 40 Base address + 0x2C Byte 47 Byte 46 Byte 45 Byte 44 Base address + 0x30 Byte 51 Byte 50 Byte 49 Byte 48 Base address + 0x34 Byte 55 Byte 54 Byte 53 Byte 52 Base address + 0x38 Byte 59 Byte 58 Byte 57 Byte 56 Base address + 0x3C Byte 63 Byte 62 Byte 61 Byte 60 Base address + 0x40 Byte 67 Byte 66 Byte 65 Byte 64 Base address + 0x44 Byte 71 Byte 70 Byte 69 Byte 68 Base address + 0x48 Byte 75 Byte 74 Byte 73 Byte 72 Base address + 0x4C Byte 79 Byte 78 Byte 77 Byte 76 Base address + 0x50 Byte 83 Byte 82 Byte 81 Byte 80 Base address + 0x54 Byte 87 Byte 86 Byte 85 Byte 84 Base address + 0x58 Byte 91 Byte 90 Byte 89 Byte 88 2 v2.1 CoreFROM Table 2FROM Data (Continued) Offset Data Base address + 0x5C Byte 95 Byte 94 Byte 93 Byte 92 Base address + 0x60 Byte 99 Byte 98 Byte 97 Byte 96 Base address + 0x64 Byte 103 Byte 102 Byte 101 Byte 100 Base address + 0x68 Byte 107 Byte 106 Byte 105 Byte 104 Base address + 0x6C Byte 111 Byte 110 Byte 109 Byte 108 Base address + 0x70 Byte 115 Byte 114 Byte 113 Byte 112 Base address + 0x74 Byte 119 Byte 118 Byte 117 Byte 116 Base address + 0x78 Byte 123 Byte 122 Byte 121 Byte 120 Base address + 0x7C Byte 127 Byte 126 Byte 125 Byte 124 Resource Requirements The utilization for CoreFROM in a ProASIC3 device is 20 tiles. Ordering Information CoreFROM is included in the SysBASIC core bundle that is supplied with the Actel CoreConsole IP Deployment Platform tool. The obfuscated RTL version of SysBASIC (SysBASIC-OC) is available for free with CoreConsole. The source RTL version of SysBASIC (SysBASIC-RM) can be ordered through your local Actel sales representative. CoreFROM cannot be ordered separately from the SysBASIC core bundle. List of Changes The following table lists critical changes that were made in the current version of the document. Previous Version Changes in Current Version (v2.1) Page v2.0 The "Supported Device Families" section was updated to include ProASIC3L. 1 The "Resource Requirements" section was updated to change ProASIC3E to ProASIC3. 3 Advanced v0.1 The "Product Summary" section and "General Description" section were updated to include 1 Cortex-M1 and IGLOO/e information. Datasheet Categories In order to provide the latest information to designers, some datasheets are published before data has been fully characterized. Datasheets are designated as "Product Brief," "Advanced," "Production," and "Datasheet Supplement." The definitions of these categories are as follows: Product Brief The product brief is a summarized version of a datasheet (advanced or production) containing general product information. This brief gives an overview of specific device and family information. Advanced This datasheet version contains initial estimated information based on simulation, other products, devices, or speed grades. This information can be used as estimates, but not for production. Unmarked (production) This datasheet version contains information that is considered to be final. v2.1 3 Actel and the Actel logo are registered trademarks of Actel Corporation. All other trademarks are the property of their owners. www.actel.com Actel Corporation Actel Europe Ltd. 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