參數(shù)資料
型號： PCI1520-EP
英文描述： Military Enhanced Plastic PC Card Controllers Data Manual
中文描述： 軍事增強塑料PC卡控制器數(shù)據(jù)手冊
文件頁數(shù)： 119/125頁
文件大?。?/td> 716K
代理商： PCI1520-EP
6
–
8
6.5
Socket Control Register
The socket control register provides control of the voltages applied to the socket and instructions for the CB CLKRUN
protocol. The PCI1520 ensures that the socket is powered up only at acceptable voltages when a CardBus card is
inserted. See Table 6
–
6 for a complete description of the register contents.
Bit
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
Name
Socket control
Type
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Default
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Name
Socket control
Type
R
R
R
R
R
R
RW
R
RW
RW
RW
RW
R
RW
RW
RW
Default
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
Register:
Offset:
Type:
Default:
Socket control
CardBus socket address + 10h
Read-only, Read/Write
0000 0400h
Table 6
–
6. Socket Control Register Description
BIT
SIGNAL
TYPE
FUNCTION
31
–
12
RSVD
R
Reserved. These bits return 0 when read. A write to these bits has no effect.
11
ZV_ACTIVITY
R
Zoomed video activity. This bit returns 0 when the ZVEN bits for both sockets are 0 (disabled). If either
ZVEN bit is set to 1, the ZV_ACTIVITY bit returns 1.
10
STDZVREG
R
Standardized zoomed video register model support. This bit returns 1 by default when the STDZVEN
bit (bit 0) in the diagnostic register is cleared (PCI offset 93h, see Section 4.34).
9
ZVEN
RW
Zoomed video enable. This bit enables zoomed video for this socket.
8
RSVD
R
Reserved. ThIs bit returns 0 when read. A write to thIs bit has no effect.
7
STOPCLK
RW
CB CLKRUN protocol instructions.
0 = CB CLKRUN protocol can only attempt to stop/slow the CB clock if the socket is idle and the
PCI CLKRUN protocol is preparing to stop/slow the PCI bus clock.
1 = CB CLKRUN protocol can attempt to stop/slow the CB clock if the socket is idle.
6
–
4
VCCCTRL
RW
VCC control. Bits 6
–
4 request card VCC changes.
000 = Request power off (default)
001 = Reserved
010 = Request VCC = 5 V
011 = Request VCC = 3.3 V
Reserved. Bit 3 returns 0 when read.
100 = Request VCC = X.X V
101 = Request VCC = Y.Y V
110 = Reserved
111 = Reserved
3
RSVD
R
2
–
0
VPPCTRL
RW
VPP control. Bits 2
–
0 request card VPP changes.
000 = Request power off (default)
001 = Request VPP = 12 V
010 = Request VPP = 5 V
011 = Request VPP = 3.3 V
100 = Request VPP = X.X V
101 = Request VPP = Y.Y V
110 = Reserved
111 = Reserved
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