CL-PD6710/’22
ISA–to–PC-Card Host Adapters
9.5 ATA Control
Register Name: ATA Control
Index: 26h
Register Per: socket
Register Compatibility Type: ext.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Speaker Is
LED Input
A25/CSEL
RW:0
A24/M/S*
RW:0
A23/VU
RW:0
A22
A21
Scratchpad Bit
RW:0
ATA Mode
RW:0
RW:0
RW:0
RW:0
Bit 0 — ATA Mode
0
1
Normal operation.
Configures the socket interface to handle ATA-type disk drives.
This bit reconfigures the particular socket as an ATA drive interface. Refer to Table 11-1 on
page 75 for PC Card socket pin definitions in ATA mode.
Bit 1 — Speaker Is LED Input
0
1
Normal operation.
The PC Card -SPKR pin will be used to drive IRQ12 if Drive LED Enable (see page 61) is set.
This bit changes the function of the BVD2/-SPKR/-LED pin (see page 18) from digital speaker in-
put to disk status LED input. When in I/O Card Interface mode or ATA mode, setting this bit to ‘1’
reconfigures the BVD2/-SPKR/-LED input pin to serve as a -LED input from the socket.
NOTE: This bit should be set to ‘0’ if in Memory Card Interface mode.
Bit 3 — A21
In ATA mode, the value in this bit is applied to the ATA A21 pin and is vendor-specific. Certain ATA
drive vendor-specific performance enhancements beyond the PC Card Standard may be con-
trolled through use of this bit. This bit has no hardware control function when not in ATA mode.
Bit 4 — A22
In ATA mode, the value in this bit is applied to the ATA A22 pin and is vendor-specific. Certain ATA
drive vendor-specific performance enhancements beyond the PC Card Standard may be con-
trolled through use of this bit. This bit has no hardware control function when not in ATA mode.
Bit 5 — A23/VU
In ATA mode, the value in this bit is applied to the ATA A23 pin and is vendor-specific. Certain ATA
drive vendor-specific performance enhancements beyond the PC Card Standard may be con-
trolled through use of this bit. This bit has no hardware control function when not in ATA mode.
Bit 6 — A24/M/S*
In ATA mode, the value in this bit is applied to the ATA A24 pin and is vendor-specific. Certain ATA
drive vendor-specific performance enhancements beyond the PC Card Standard may be con-
trolled through use of this bit. This bit has no hardware control function when not in ATA mode.
Bit 7 — A25/CSEL
In ATA mode, the value in this bit is applied to the ATA A25 pin and is vendor-specific. Certain ATA
drive vendor-specific performance enhancements beyond the PC Card Standard may be con-
trolled through use of this bit. This bit has no hardware control function when not in ATA mode.
64
May 1997
EXTENSION REGISTERS
PRELIMINARY DATA SHEET v3.1
CIRRUS [ CIRRUS LOGIC ]
