CL-PD6710/’22
ISA–to–PC-Card Host Adapters
9.4 Chip Information
Register Name: Chip Information
Index: 1Fh
Register Per: chip
Register Compatibility Type: ext.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Cirrus Logic Host-Adapter
Identification
Dual/Single
Socket*
CL-PD67XX Revision Level
Reserved
a
b
c
R:11
R:n
R:nnnn
R:n
a
b
c
The value for CL-PD6710 is ‘0’, and the value for CL-PD6722 is ‘1’.
This read-only value depends on the revision level of the CL-PD67XX chip.
The value for CL-PD6722 is ‘1’. The value for the CL-PD6710 is ‘0’.
Bits 4:1 — CL-PD67XX Revision Level
This field identifies the revision of the controller. The initial value is ‘111’. Contact Cirrus Logic for
more information on revision levels for the CL-PD6710 and CL-PD6722.
Bit 5 — Dual/Single Socket*
0
1
Chip identified as a single-socket controller.
Chip identified as a dual-socket controller.
This bit specifies the number of sockets supported by the CL-PD67XX.
Bits 7:6 — Cirrus Logic Host-Adapter Identification
00
11
Second read after I/O write to this register.
First read after I/O write to this register.
This field identifies a Cirrus Logic host-adapter device. After chip reset or doing an I/O write to this
register, the first read of this register will return ‘11’. On the next read, this field will be ‘00’. This
pattern of toggling data on subsequent reads can be used by software to determine presence of
a Cirrus Logic host adapter in a system or to determine occurrence of a device reset.
May 1997
63
PRELIMINARY DATA SHEET v3.1
EXTENSION REGISTERS
CIRRUS [ CIRRUS LOGIC ]
