MB86967 Datasheet, PDF (71/129 Pages) Fujitsu Component Limited. – LAN Controller with PC Card, ISA Bus, and General-purpose Bus Interfaces

MB86967
(5) CARDCR: LAN Card Control Register (Base address +10)
This is an external ROM control register that can be accessed only in the PC card mode.
Read
Write
Initial
Value
Bit 7
CIS WR
ENA
Bit 6
COMMON
WR ENA
Bit 5
ID
NUMBER
WR ENA
0
0
0
Bit 4
0
—
0
Bit 3
0
—
0
Bit 2
0
—
0
Bit 1
0
—
0
Bit 0
0
—
0
Bit no. Bit name
7 CIS WRITE
ENABLE
(CIS Write
Enable)
6 COMMON WR
ENABLE
(Common
Memory Write
Enable)
5 ID NUMBER
WR ENABLE
(ID Number
Write Enable)
0 to 4 Not used
Operation
Read/Write
Value
0
1
Function
The system cannot write data to CIS in E²PROM or flash
ROM.
The system can write data to CIS in E²PROM or flash ROM.
Read/Write 0 The system cannot write data to common memory in
E²PROM or flash ROM.
1 The system can write data to common memory in E²PROM or
flash ROM.
Read/Write 0 The system cannot write data to I/O space (for ID number) in
E²PROM or flash ROM.
1 The system can write data to I/O space (for ID number) in
E²PROM or flash ROM.
Read
— The read values of these bits are always 0s. These bits are
not affected by writing.
8. Initializing Card (Using MB86967 in PC Card)
Immediately after the card is installed in the system, the IC memory card interface (memory card) is selected.
The following instructions describe how to switch to the I/O card interface:
a. The system reads card attribute data (CIS) for setting operating environments.
b. The data is written to the card configuration register (CCR).
At this time, the LAN controller is set to the 8-bit interface or 16-bit interface by setting the bit 5 (IOIS8) of
CCR1.
c. The Ethernet ID numbers read from CIS or I/O space are written.
Note: Switch from the I/O card interface to IC memory card interface by setting the external RESET pin or the
SRESET bit of CCR0.
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