1 exca identification and revision register – Texas Instruments Dual/Single Socket CardBus and UntraMedia Controller PCI7621 User Manual
Page 133

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.