參數(shù)資料
型號: PCI1221GHK
廠商: Texas Instruments, Inc.
英文描述: KPT 11C 11#16 SKT PLUG
中文描述: PC卡控制器
文件頁數(shù): 86/123頁
文件大?。?/td> 1659K
代理商: PCI1221GHK
86
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
ExCA power-control register (index 02h)
Bit
7
6
5
4
3
2
1
0
Name
ExCA power control
Type
R/W
R
R
R/W
R/W
R
R/W
R/W
Default
0
0
0
0
0
0
0
0
Register:
Type:
Offset:
ExCA power control
Read only, read/write (see individual bit descriptions)
CardBus socket address + 802h; Card A ExCA offset 02h
Card B ExCA offset 42h
Default:
Description: This register provides PC Card power control. Bit 7 of this register controls the 16-bit outputs
on the socket interface, and can be used for power management in 16-bit PC Card
applications. See Table 41 for a complete description of the register contents.
00h
Table 41. ExCA Power-Control Register (Index 02h)
BIT
SIGNAL
TYPE
FUNCTION
7
COE
R/W
Card output enable. Bit 7 controls the state of all of the 16-bit outputs on the PCI1221. This bit is encoded as:
0 = 16-bit PC Card outputs disabled (default)
1 = 16-bit PC Card outputs enabled
6-5
RSVD
R
Reserved. Bits 6–5 are read only and return 0s when read. Write transactions have no effect.
4-3
EXCAVCC
R/W
VCC. Bits 4-3 are used to request changes to card VCC. This field is encoded as:
00 = 0 V (default)
01 = 0 V reserved
10 = 5 V
11 = 3 V
2
RSVD
R
Reserved. Bit 2 is read only and returns 0 when read. Write transactions have no effect.
1-0
EXCAVPP
R/W
VPP. Bits 1-0 are used to request changes to card VPP. The PCI1221 ignores this field unless VCC to the
socket is enabled (i.e., 5 V or 3.3 V). This field is encoded as:
00 = 0 V (default)
01 = VCC
10 = 12 V
11 = 0 V reserved
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