cl-pd6833 Cirrus Logic, Inc., cl-pd6833 Datasheet - Page 161

• Manufacturer Part Number: cl-pd6833
• Description: Pci-to-cardbus Host Adapter
• Manufacturer: Cirrus Logic, Inc.

CL-PD6833
PCI-to-CardBus Host Adapter
11.9.3
Bits 17:16 — # Sockets [1:0] (Number of Sockets Supportable by Device)
Bit 18 — IDE Interface
Bit 19 — Slave DMA
Bit 20 — RFU (reserved for future use)
Bit 21 — GPSTB Capable
Bit 22 — RFU (reserved for future use)
Bit 23 — Per-Socket LED
June 1998
Register Name: Device Capability Byte A
I/O Index: 36h
Memory Offset: 936h
Per-Socket
Bit 23
LED
R:1
This bit field indicates how many sockets a device is capable of supporting, expressed as the
highest socket index number supportable, for example ‘00’ indicates only socket 0 is supportable,
meaning a single socket device, and ‘11’ indicates sockets 3 through 0 are supportable, indicating
a four-socket capable device.
A value of ‘0’ indicates that the CL-PD6833 does not support driving an external IDE drive.
A ‘1’ at this bit indicates that the CL-PD6833 can act as a DMA slave. The Slave DMA Wired bit
(bit 2 of the Device Implementation Byte A register; see
is wired to allow this feature to be used.
A value of ‘0’ in this field indicates that the CL-PD6833 does not support general-purpose strobe.
If this bit is set to ‘1’, the device is capable of supporting independent LEDs on each socket.
If this bit is set to ‘1’, it is intended that Socket Services would check bits 16 and 17 of the Device
Implementation Byte C register (see
the system implementation. The description of bits 16 and 17 explains the software implications if
per-socket LED support is to be enabled.
Device Capability Byte A
ADVANCE DATA BOOK v0.3
Bit 22
RFU
R:0
Capable
GPSTB
Bit 21
R:0
Bit 20
RFU
R:0
page
165) to determine if per-socket LEDs are supported in
Slave DMA
Bit 19
R:1
page
IDE Interface
Bit 18
R:0
163) indicates whether a system
Register Compatibility Type: ext.
EXTENSION REGISTERS
# Sockets 1
Bit 17
R:0
Register Per: chip
# Sockets 0
Bit 16
R:1
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