参数资料
型号: SPD6729QCE
厂商: INTEL CORP
元件分类: 总线控制器
英文描述: PCMCIA BUS CONTROLLER, PQFP208
封装: MQFP-208
文件页数: 61/116页
文件大小: 1442K
代理商: SPD6729QCE
PCI-to-PC Card (PCMCIA) Controller — PD6729
Datasheet
49
7.2
Interface Status
Bits 1-0: Battery Voltage Detect
In Memory Card Interface mode, these bits are used by PCMCIA support software and firmware to
indicate the remaining capacity of the battery in battery-backed cards. In I/O Card Interface mode,
bit 0 indicates the state of the BVD1/-STSCHG/-RI pin (Table 2 on page 18). Bit 1 status is not
valid in I/O Card Interface mode.
Bits 3-2: Card Detect
These bits indicate the state of the -CD1 and -CD2 pins (Table 2).
Register Name: Interface Status
Index: 01h
Register Per: socket
Register Compatibility Type: 365
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
RDY
WP
-CD2
-CD1
BVD2
BVD1
1
Card Power
On
Ready/Busy*
Write Protect
Card Detect
Battery Voltage Detect
R:11
R:0
R2
R3
R4
R5
NOTES:
1. Bit 7 always reads a ‘1’ on the PD6729.
2. Bit 5 indicates the value of the RDY/-IREQ pin (Table 2 on page 18).
3. Bit 4 indicates the value of the WP/-IOIS16 pin (Table 2).
4. Bits 3-2 indicate the inversion of the values of the -CD1 and -CD2 pins (Table 2).
5. Bits 1-0 indicate the values of the BVD1/-STSCHG/-RI and BVD2/-SPKR/-LED pins (Table 2).
BVD2 Level
BVD1 Level
Bit 1
Bit 0
PCMCIA Interpretation
Low
0
Card data lost
Low
High
0
1
Battery low warning
High
Low
1
0
Card data lost
High
1
Battery/data okay
-CD2 Level
-CD1 Level
Bit 3
Bit 2
Card Detect Status
High
0
Either no card or card is not fully inserted
High
Low
0
1
Card is not fully inserted
Low
High
1
0
Card is not fully inserted
Low
1
Card is fully inserted
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