Datasheet

5−16
5.17 ExCA Memory Windows 0−4 Offset-Address Low-Byte Registers
These registers contain the low byte of the 16-bit memory window offset address for memory windows 0, 1, 2, 3, and
4. The 8 bits of these registers correspond to bits A19−A12 of the offset address.
Bit 7 6 5 4 3 2 1 0
Default 0 0 0 0 0 0 0 0
Register: ExCA memory window 0 offset-address low-byte
Offset: CardBus socket address + 814h; ExCA offset 14h
Register: ExCA memory window 1 offset-address low-byte
Offset: CardBus socket address + 81Ch; ExCA offset 1Ch
Register: ExCA memory window 2 offset-address low-byte
Offset: CardBus socket address + 824h; ExCA offset 24h
Register: ExCA memory window 3 offset-address low-byte
Offset: CardBus socket address + 82Ch; ExCA offset 2Ch
Register: ExCA memory window 4 offset-address low-byte
Offset: CardBus socket address + 834h; ExCA offset 34h
Type: Read/Write
Default: 00h
5.18 ExCA Memory Windows 0−4 Offset-Address High-Byte Registers
These registers contain the high 6 bits of the 16-bit memory window offset address for memory windows 0, 1, 2, 3,
and 4. The lower 6 bits of these registers correspond to bits A25−A20 of the offset address. In addition, the write
protection and common/attribute memory configurations are set in this register. See Table 5−13 for a complete
description of the register contents.
Bit 7 6 5 4 3 2 1 0
Default 0 0 0 0 0 0 0 0
Register: ExCA memory window 0 offset-address high-byte
Offset: CardBus socket address + 815h; ExCA offset 15h
Register: ExCA memory window 1 offset-address high-byte
Offset: CardBus socket address + 81Dh; A ExCA offset 1Dh
Register: ExCA memory window 2 offset-address high-byte
Offset: CardBus socket address + 825h; ExCA offset 25h
Register: ExCA memory window 3 offset-address high-byte
Offset: CardBus socket address + 82Dh; ExCA offset 2Dh
Register: ExCA memory window 4 offset-address high-byte
Offset: CardBus socket address + 835h; ExCA offset 35h
Type: Read/Write
Default: 00h
Table 5−13. ExCA Memory Windows 0−4 Offset-Address High-Byte Registers Description
BIT SIGNAL TYPE FUNCTION
7 WINWP RW
Write protect. Bit 7 specifies whether write operations to this memory window are enabled. This bit is encoded as:
0 = Write operations are allowed (default)
1 = Write operations are not allowed
6 REG RW
Bit 6 specifies whether this memory window is mapped to card attribute or common memory. This bit is encoded
as:
0 = Memory window is mapped to common memory (default)
1 = Memory window is mapped to attribute memory
5−0 OFFHB RW
Offset-address high byte. Bits 5−0 represent the upper address bits A25−A20 of the memory window
offset address.