W89C841F Datasheet, PDF (47/102 Pages) Winbond – 3-IN - 1 10/100M FAST ETHERNET CONTROLLER

W89C841F/D
9. FUNCTION REGISTERS
W89C841F implements two types of function registers: Cxx and Dxx. Cxx function registers are used
to perform the function control and status monitor of W89C841F. Dxx function registers are used to
control power management parameters, monitor power management status and setup wake-up
frames parameters. The general attributes of W89C841F function registers are described as the
following:
1) The function registers of W89C841F can be mapped into the host I/O space or memory
space.
2) The registers of the W89C841F are double word aligned. Each register consists of 32 bits and
may be accessed using any byte-enable combinations with double word aligned address.
3) Burst access to the registers of W89C841F will be terminated after 1st data transfer
completed with a Disconnect without Data.
4) SoftReset will have the same effect as done by HardReset on the registers of W89C841F,
except for the function registers C34/CMA0, C38/CMA1, D00/DWUPC − D6c/DBWF4BM3,
Dcc/DPA0, Dd0/DPA1 and Df0/DFER − Dfc/DFFER and configuration registers
5) Any read on the reserved register will be returned with 0 value.
Cxx Function Registers
The following table outlined all the control/status registers in W89C841F, offset address, and
summarized its function.
CODE
C00
C04
C08
C0c
C10
C14
C18
C1c
C20
C24
C28
C2c
C30
C34
C38
C3c
ABBR.
CBCR
CTSDR
CRSDR
CRDLA
CTDLA
CISR
CIMR
CNCR
CFDCR
CTDAR
CTBAR
CRDAR
CRBAR
CMA0
CMA1
CGTR
MEANING
Bus Control
Transmit Start Demand
Receive Start Demand
Receive Descriptor List Address
Transmit Descriptor List Address
Interrupt Status
Interrupt Mask
Network Configuration
Frame Discarded Counter
Current Transmit Descriptor Address
Current Transmit Buffer Address
Current Receive Descriptor Address
Current Receive Buffer Address
Multicast Address 0
Multicast Address 1
General Timer Register
BASE OFFSET
FROM FBIOAC
00h
04h
08h
0Ch
10h
14h
18h
1Ch
20h
24h
28h
2ch
30h
34h
38h
3Ch
BASE OFFSET
FROM FBMA
000h
004h
008h
00Ch
010h
014h
018h
01Ch
020h
024h
028h
02ch
030h
034h
038h
03Ch
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Publication Release Date: October 18, 2001
Revision A3