W89C926 Datasheet, PDF (15/48 Pages) Winbond – PCMCIA ETHERNET NETWORK TWISTED PAIR INTERFACE CONTROLLER

W89C926 PENTIC+
CCSR (Card Configuration and Status Register)
Access Address: AMBase + 00FD2H
Access Type: Attribute Memory Read/Write
BIT
SYMBOL
DESCRIPTION
0
-
Reserved, must be 0.
1
Intr
Interrupt Status
This bit indicates the internal status of an interrupt request. It remains high
until the condition that caused the interrupt request has been serviced.
This bit is 0 at power-on.
2-7
-
Reserved, must be 0s.
SCR (Socket and Copy Register)
The SCR is used to enable the PENTIC+ to distinguish between similar cards installed in the same
system.
Access Address: AMBase + 00FD6H
Access Type: Attribute Memory Read/Write
BIT
SYMBOL
DESCRIPTION
0-3
SocNum Socket Number
Set these bits to indicate to the PENTIC+ that it is located in the n'th
socket. The first socket is numbered 0. This permits any cards designed to
do so to share a common set of IO ports while remaining uniquely
identifiable. These bits are 0 at power-on.
4-6
CopNum Copy Number
Set these bits to indicate to the PENTIC+ that it is the n'th copy of another
card installed in the system that is configured identically. The first identical
card should be assigned a value of 0 as its copy number. This permits any
cards designed to do so to share a common set of I/O ports while
remaining uniquely identifiable and consecutively ordered. These bits are
0s at power-on.
7
-
Reserved, must be 0.
LAN Configuration Register Set
These two registers are used for LAN configuration control.
CFA (Configuration Register A)
This register is used to select the PENTIC+'s operating mode and LED control.
Access Address: AMBase + 00FF0H
Access Type: Attribute Memory Read/Write
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Publication Release Date: January 1996
Revision A1