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DM9102A Datasheet(PDF) 61 Page - List of Unclassifed Manufacturers |
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DM9102A Datasheet(HTML) 61 Page - List of Unclassifed Manufacturers |
61 / 77 page DM9102A Single Chip Fast Ethernet NIC controller Final Version: DM9102A-DS-F03 August 28, 2000 61 Serial ROM Overview The purpose of Configuration ROM (EEPROM) is to support the DM9102A information to the driver for the card. The SROM must support 64 words or more space for configuration data. The format of the SROM is as followed The format of EEPROM Field Name Offset Size Subsystem ID block 0 18 CROM version 18 1 Controller count 19 1 Controller_0 Information 20 n Controller_1 Information 20+n m : (depends on controller count) : : CRC checksum 126 2 1. Subsystem ID Block Every card must have a Subsystem ID to indicate the system vendor information. The content will be transferred into the PCI configuration space during hardware reset function. Vendor ID & Device ID can be set in EEPROM content & auto-loaded to PCI configuration register after reset.(default value = 1282, 9102) This function must be selectable for enable/disable by Auto_Load_Control (offset 08 of EEPROM) setting to avoid damaging default value due to incorrectly auto-load operation. CRC check circuit of EEPROM contents to decide the auto-load operation of Vendor ID & Subsystem. Subsystem Vendor ID Subsystem ID Reserved Reserved ID_block_CRC PMC PMCSR Reserved PCI Device ID PCI Vender ID NCE Auto_load_control 0 2 4 6 8 10 12 14 17,16 Byte Offset. Subsystem ID Block Byte Offset (08): Auto_Load_Control 0 3 4 7 Bit3~0: “1010” to enable auto-load of PCI Vendor_ID & Device_ID, “0” to disable. Bit7~4: “1X1X” to enable auto-load of NCE, PME & PMC & PMCSR to PCI configuration space. These four bits can also control the inverse of WOL or PULSE WOL.. |
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