W89C926 Datasheet, PDF (12/48 Pages) Winbond – PCMCIA ETHERNET NETWORK TWISTED PAIR INTERFACE CONTROLLER

W89C926 PENTIC+
Buffer Memory Mapping
NIC CORE
MEMORY MAP
0000H
001FH
0020H
00FFH
0100H
3FFFH
4000H
7FFFH
8000H
BFFFH
C000H
FFFFH
Nonvolatile Memory Mapping
F/ EE = 1 (flash memory used)
SYSTEM
OFFSET (HA0-16)
00000H
03FFFH
04000H
1FFFFH
NE2000 COMPATIBLE
ID Registers
Aliased
ID Registers
Buffer SRAM
(16K × 8)
Aliased
ID Registers
Aliased Buffer SRAM
MEMORY TYPE
Attribute/
Flash
Common/
Flash
NAME
CIS/ID/PCMCIA Register
(8K × 8)
(112K × 8)
F/ EE = 0 (EEPROM used)
SYSTEM
OFFSET (HA0-16)
MEMORY TYPE
NAME
00000H
Attribute/
CIS
003D6H
(Note)
(492 × 8)
Notes:
1. This attribute memory is an image from EEPROM. It is actually resident in upper half of the SRAM after power-on auto-
loading.
2. Refer to "Attribute Memory Mapping" for detailed locations.
3. The PENTIC+ decodes HA0-16 for memory access. The (common or attribute) MEMBase addresses are left for the host adapter
and the socket service to determine.
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