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| 型號(hào)： | SN2005118412ZHK |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類(lèi)： | 總線控制器 |
| 英文描述： | PCMCIA BUS CONTROLLER, PBGA216 |
| 封裝： | GREEN, PLASTIC, MICRO BGA-216 |
| 文件頁(yè)數(shù)： | 32/271頁(yè) |
| 文件大?。?/td> | 3240K |
| 代理商： | SN2005118412ZHK |
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ExCA Compatibilty Registers (Function 0)
111
September 2005
SCPS110
5.2
ExCA Interface Status Register
This register provides information on current status of the PC Card interface. An X in the default bit values
indicates that the value of the bit after reset depends on the state of the PC Card interface. See Table 53
for a complete description of the register contents.
ExCA register offset:
CardBus Socket Address + 801h: Card A ExCA Offset 01h
Register type:
Read-only
Default value:
00XX XXXXb
BIT NUMBER
7
6
5
4
3
2
1
0
RESET STATE
0
X
Table 53. ExCA Interface Status Register Description
BIT
SIGNAL
TYPE
FUNCTION
7
RSVD
R
This bit returns 0b when read. A write has no effect.
6
CARDPWR
R
CARDPWR. Card power. This bit indicates the current power status of the PC Card socket. This bit reflects
how the ExCA power control register has been programmed. The bit is encoded as:
0 = VCC and VPP to the socket are turned off (default).
1 = VCC and VPP to the socket are turned on.
5
READY
R
This bit indicates the current status of the READY signal at the PC Card interface.
0 = PC Card is not ready for a data transfer.
1 = PC Card is ready for a data transfer.
4
CARDWP
R
Card write protect. This bit indicates the current status of the WP signal at the PC Card interface. This signal
reports to the controller whether or not the memory card is write protected. Further, write protection for an
entire PCIxx12 16-bit memory window is available by setting the appropriate bit in the ExCA memory
window offset-address high-byte register.
0 = WP signal is 0b. PC Card is R/W.
1 = WP signal is 1b. PC Card is read-only.
3
CDETECT2
R
Card detect 2. This bit indicates the status of the CD2 signal at the PC Card interface. Software can use
this and CDETECT1 to determine if a PC Card is fully seated in the socket.
0 = CD2 signal is 1b. No PC Card inserted.
1 = CD2 signal is 0b. PC Card at least partially inserted.
2
CDETECT1
R
Card detect 1. This bit indicates the status of the CD1 signal at the PC Card interface. Software can use
this and CDETECT2 to determine if a PC Card is fully seated in the socket.
0 = CD1 signal is 1b. No PC Card inserted.
1 = CD1 signal is 0b. PC Card at least partially inserted.
10
BVDSTAT
R
Battery voltage detect. When a 16-bit memory card is inserted, the field indicates the status of the battery
voltage detect signals (BVD1, BVD2) at the PC Card interface, where bit 0 reflects the BVD1 status, and
bit 1 reflects BVD2.
00 = Battery is dead.
01 = Battery is dead.
10 = Battery is low; warning.
11 = Battery is good.
When a 16-bit I/O card is inserted, this field indicates the status of the SPKR (bit 1) signal and the STSCHG
(bit 0) at the PC Card interface. In this case, the two bits in this field directly reflect the current state of these
card outputs.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SN200512N | 制造商:Texas Instruments 功能描述: |
| SN200513N | 制造商:Texas Instruments 功能描述: |
| SN200515N | 制造商:Texas Instruments 功能描述: |
| SN200520N | 制造商:Texas Instruments 功能描述: |
| SN200530DR | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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