CL-PD6833-QC-A View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
'CL-PD6833-QC-A' PDF : 216 Pages View PDF
CL-PD6833
PCI-to-CardBus Host Adapter
11.5 ATA Control
Register Name: ATA Control
I/O Index: 26h
Memory Offset: 826h
Bit 7
Bit 6
Bit 5
A25/CSEL A24/M/S*
A23/VU
R/W:0
R/W:0
R/W:0
Bit 4
A22
R/W:0
Bit 3
A21
R/W:0
Register Per: socket
Register Compatibility Type: ext.
Bit 2
Bit 1
Bit 0
Scratchpad Bit
Speaker is
LED Input
ATA Mode —
PME_CXT
R/W:0
R/W:0
R/W:0
Bit 0 — ATA Mode — PME_CXT
0
Normal operation.
1
Configures the socket interface to handle ATA-type disk drives.
This bit reconfigures the particular socket as an ATA drive interface. Refer to Table 14-1 on
page 179 for PC Card socket pin definitions in ATA mode. This bit is part of the PME_CXT (PME
Context), a set of register bits that do not get reset or initialized if PME Enable is true when the
CL-PD6833 changes power states from D3 to D0 through a software PCI Bus Segment reset.
Bit 1 — Speaker is LED Input
0
Normal operation.
1
The PC Card SPKR# pin is used to drive the LED-OUT* pin.
This bit changes the function of the BVD2/SPKR#/LED# pin (see page 19) from digital speaker
input 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. The level
of the input then appears as an open-drain output on the LED1* or LED2* pin corresponding to
the socket.
Bit 2 — Scratchpad Bit
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 PCMCIA 2.1 standard can be
controlled 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 PCMCIA 2.1 standard can be
controlled 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 PCMCIA 2.1 standard can be
controlled through use of this bit. This bit has no hardware control function when not in ATA mode.
138
EXTENSION REGISTERS
ADVANCE DATA BOOK v0.3
June 1998
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