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7−8
7.10 CardBus CIS Base Address Register
The internal CARDBUS input to the 1394 OHCI core is tied high such that this register returns 0s when read. See
Table 7−9 for a complete description of the register contents.
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Name CardBus CIS base address
Type RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW
Default 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Name CardBus CIS base address
Type RW RW RW RW RW R R R R R R R R R R R
Default 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Register: CardBus CIS base address
Offset: 18h
Type: Read/Write, Read-only
Default: 0000 0000h
Table 7−9. CardBus CIS Base Address Register Description
BIT FIELD NAME TYPE DESCRIPTION
31−11 CIS_BASE RW
CIS base address. This field specifies the upper 21 bits of the 32-bit CIS base address. If CARDBUS
is sampled high on a GRST, then this field is read-only, returning 0s when read.
10−4 CIS_SZ R
CIS address space size. This field returns 0s when read, indicating that the CIS space requires a
2K-byte region of memory.
3 CIS_PF R
CIS prefetch. Bit 3 returns 0 when read, indicating that the CIS is nonprefetchable. Furthermore, the
CIS is a byte-accessible address space, and either a doubleword or 16-bit word access yields
indeterminate results.
2−1 CIS_MEMTYPE R
CIS memory type. This field returns 0s when read, indicating that the CardBus CIS base address
register is 32 bits wide and mapping can be done anywhere in the 32-bit memory space.
0 CIS_MEM R
CIS memory indicator. Bit 0 returns 0 when read, indicating that the CIS is mapped into system
memory space.
7.11 CardBus CIS Pointer Register
The internal CARDBUS input to the 1394 OHCI core is tied high such that this register returns 0s when read.
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Name CardBus CIS pointer
Type R R R R R R R R R R R R R R R R
Default 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Name CardBus CIS pointer
Type R R R R R R R R R R R R R R R R
Default 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Register: CardBus CIS pointer
Offset: 28h
Type: Read-only
Default: 0000 0000h