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Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface
Datasheet
SMSC LAN9420/LAN9420i 103 Revision 1.22 (09-25-08)
DATASHEET
4.3 DMAC Control and Status Registers (DCSR)
Table 4.4 lists the registers contained in this section.
Table 4.4 DMAC Control and Status Register (DCSR) Map
OFFSET SYMBOL REGISTER NAME
0000h BUS_MODE Bus Mode Register
0004h TX_POLL_DEMAND Transmit Poll Demand Register
0008h RX_POLL_DEMAND Receive Poll Demand Register
000Ch RX_ BASE_ADDR Receive List Base Address Register
0010h TX_BASE_ADDR Transmit List Base Address Register
0014h DMAC_STATUS DMA Controller Status Register
0018h DMAC_CONTROL DMA Controller Control (Operation Mode) Register
001Ch DMAC_INTR_ENA DMA Controller Interrupt Enable Register
0020h MISS_FRAME_CNTR Missed Frame Counter (RX Only)
0024h – 004Ch RESERVED Reserved for future expansion
0050h CUR_TX_BUF_ADDR Current Transmit Buffer Address
0054h CUR_RX_BUF_ADDR Current Receive Buffer Address
0058h – 007Ch RESERVED Reserved for future expansion