參數(shù)資料
型號(hào): PCI6421
廠商: Texas Instruments, Inc.
英文描述: DUAL/SINGLE SOCKET CARDBUS AND ULTRAMEDIA CONTROLLER
中文描述: 雙/單插槽CardBus和UltraMedia控制器
文件頁數(shù): 98/204頁
文件大?。?/td> 860K
代理商: PCI6421
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422
Table 49. General Control Register Description (Continued)
BIT
SIGNAL
TYPE
FUNCTION
2
DED_SC_PWR_
CTRL
RW
Dedicated Smart Card power control. This bit determines how power to the dedicated Smart Card
socket is controlled.
0 = Controlled through the SC_PWR_CTRL terminal (default)
1 = Controlled through the VPP voltage of socket B of the CardBus power switch (the design
must ensure that this mode can only be set when CardBus socket B is disabled).
10
ARB_CTRL
RW
Controls top level PCI arbitration:
00 = 1394 OHCI priority
01 = CardBus priority
Note: When flash media/SD host priority is selected, there must be a two-level priority scheme with the
first level being a round robin between the flash media and SD host functions and the second level being
a round robin between the CardBus and 1394 functions.
10 = Flash media/SD host priority
11 = Fair round robin
One or more bits in this register are cleared only by the assertion of GRST.
4.32 General-Purpose Event Status Register
The general-purpose event status register contains status bits that are set when general events occur, and can be
programmed to generate general-purpose event signaling through GPE. See Table 410 for a complete description
of the register contents.
Bit
7
6
5
4
3
2
1
0
Name
General-purpose event status
Type
RCU
RCU
R
RCU
RCU
RCU
RCU
RCU
Default
0
0
0
0
0
0
0
0
Register:
Offset:
Type:
Default:
General-purpose event status
88h
Read/Clear/Update, Read-only
00h
Table 410. General-Purpose Event Status Register Description
BIT
SIGNAL
TYPE
FUNCTION
7
PWR_STS
RCU
Power change status. This bit is set when software changes the VCC or VPP power state of either socket.
12-V VPP request status. This bit is set when software has changed the requested VPP level to or from 12 V
for either socket.
6
VPP12_STS
RCU
5
RSVD
R
Reserved. This bit returns 0 when read. A write has no effect.
4
GP4_STS
RCU
GPI4 status. This bit is set on a change in status of the MFUNC5 terminal input level if configured as a
general-purpose input, GPI4.
3
GP3_STS
RCU
GPI3 status. This bit is set on a change in status of the MFUNC4 terminal input level if configured as a
general-purpose input, GPI3.
2
GP2_STS
RCU
GPI2 status. This bit is set on a change in status of the MFUNC2 terminal input level if configured as a
general-purpose input, GPI2.
1
GP1_STS
RCU
GPI1 status. This bit is set on a change in status of the MFUNC1 terminal input level if configured as a
general-purpose input, GPI1.
0
GP0_STS
RCU
GPI0 status. This bit is set on a change in status of the MFUNC0 terminal input level if configured as a
general-purpose input, GPI0.
One or more bits in this register are cleared only by the assertion of GRST.
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