cl-pd6833 Cirrus Logic, Inc., cl-pd6833 Datasheet - Page 78

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

6.3
a
The Socket Present State register reflects the present value of the socket status. Some of the bits in this
register are merely reflections of interface signals, while others are flags set to indicate a status change.
Bit 0 — CSTSCHG/WAKEUP
Bit 1 — CCD1
Bit 2 — CCD2
Bit 3 — Power Cycle Complete
Bit 4 — 16-Bit PC Card
78
RU indicates a read update.
Byte 3
Byte 2
Byte 1
Byte 0
This bit reflects the current status of the CSTSCHG/WAKEUP pin on the CardBus interface.
This bit provides for detection of a PC Card insertion/removal/presence. It is also used by the
CL-PD6833, in conjunction with CVS1, to determine the card type (PC Card 16 vs. PC Card 32).
It is a reflection of the CCD1 pin.
This bit provides for detection of a PC Card insertion/removal/presence. It is also used by the
CL-PD6833, in conjunction with CVS2, to determine the card type (PC Card 16 vs. PC Card 32).
It is a reflection of the CCD2 pin.
When this bit is set, it indicates that the interface is powered up. When this bit is cleared, the socket
is powered down. This bit is set to ‘0’ by PCIRST#.
When this bit is set, it indicates that the Card Detect state machine determined a PC Card 16 (R2)
card was inserted. This bit is cleared when another card, one that is not 16-bit, is inserted. This
bit is set to ‘0’ by PCIRST#.
CARDBUS REGISTERS
Present State
Y-V Socket
Memory Offset: 008h
Not a Card
Register Name: Present State
Bit 31
Bit 23
Bit 15
RU
RU
Bit 7
R:0
R:0
a
a
Reserved
R:00
X-V Socket 3.3-V Socket 5-V Socket
Interrupt
Bit 30
Bit 22
Bit 14
RU
Bit 6
RU
R:0
R:0
a
a
CardBus PC
Y-V Card
Bit 29
Bit 21
Bit 13
Card
RU
RU
RU
Bit 5
R:1
R:0
R:0
a
a
a
16-Bit PC
X-V Card
Bit 28
Bit 20
Bit 12
Card
RU
RU
Bit 4
RU
R:1
R:0
R:0
a
a
a
R:00000000
Reserved
3.3-V Card
Complete
Power
Cycle
Bit 27
Bit 19
Bit 11
RU
RU
Bit 3
R:0
R:0
a
a
ADVANCE DATA BOOK v0.3
5-V Card
CCD2
Bit 26
Bit 18
Bit 10
RU
RU
Bit 2
PCI-to-CardBus Host Adapter
R:0
R:1
a
a
Reserved
R:0000
Bad V
Request
CCD1
Bit 25
Bit 17
RU
RU
Register Per: socket
Bit 9
Bit 1
R:0
R:1
a
a
CC
CL-PD6833
CSTSCHG/
WAKEUP
Data Lost
June 1998
Bit 24
Bit 16
RC:0
RU
Bit 8
Bit 0
R:0
R
a