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5−5
5.1 ExCA Identification and Revision Register
This register provides host software with information on 16-bit PC Card support and 82365SL-DF compatibility. See
Table 5−2 for a complete description of the register contents.
NOTE: If bit 5 (SUBSYRW) in the system control register is 1, then this register is read-only.
Bit 7 6 5 4 3 2 1 0
Name ExCA identification and revision
Type R R RW RW RW RW RW RW
Default 1 0 0 0 0 1 0 0
Register: ExCA identification and revision
Offset: CardBus Socket Address + 800h: Card A ExCA Offset 00h
Card B ExCA Offset 40h
Type: Read/Write, Read-only
Default: 84h
Table 5−2. ExCA Identification and Revision Register Description
BIT SIGNAL TYPE FUNCTION
7−6 ‡ IFTYPE R
Interface type. These bits, which are hardwired as 10b, identify the 16-bit PC Card support provided by the
PCI7x21/PCI7x11 controller. The PCI7x21/PCI7x11 controller supports both I/O and memory 16-bit PC
Cards.
5−4 ‡ RSVD RW These bits can be used for 82365SL emulation.
3−0 ‡ 365REV RW
82365SL-DF revision. This field stores the Intel 82365SL-DF revision supported by the PCI7x21/PCI7x11
controller. Host software can read this field to determine compatibility to the 82365SL-DF register set. This
field defaults to 0100b upon reset. Writing 0010b to this field places the controller in the 82356SL mode.
‡
These bits are cleared only by the assertion of GRST
.