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Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface
Datasheet
Revision 1.22 (09-25-08) 86 SMSC LAN9420/LAN9420i
DATASHEET
4.2 System Control and Status Registers (SCSR)
Table 4.2, "System Control and Status Register Addresses" lists the registers contained in this section.
Table 4.2 System Control and Status Register Addresses
OFFSET SYMBOL REGISTER NAME
00C0h ID_REV ID and Block Revision
00C4h INT_CTL Interrupt Control Register
00C8h INT_STS Interrupt Status Register
00CCh INT_CFG Interrupt Configuration Register
00D0h GPIO_CFG General Purpose IO Configuration
00D4h GPT_CFG General Purpose Timer Configuration
00D8h GPT_CNT General Purpose Timer Current Count
00DCh BUS_CFG System Bus Configuration Register
00E0h PMT_CTRL Power Management Control
00E4h – 00F0h RESERVED Reserved for Future Use
00F4h FREE_RUN Free Run Counter
00F8h E2P_CMD EEPROM Command Register
00FCh E2P_DATA EEPROM Data Register
The registers located at 0100h - 01FCh are visible via the memory map, but are reserved and must not be
accessed. The registers located at 0100h - 01FCh are not visible or accessible via IO.
0100h – 01FCh RESERVED Reserved for Future Use