參數(shù)資料
型號: PCI1410GHK
廠商: Texas Instruments, Inc.
英文描述: PC CARD CONTROLLERS
中文描述: PC卡控制器
文件頁數(shù): 41/145頁
文件大小: 606K
代理商: PCI1410GHK
3–7
3.5.6
Integrated Pullup Resistors For PC Card Interface
The 1997 PC Card Standardrequires pullup resistors on various terminals to support both CardBus and 16-bit card
configurations. Unlike the PCI1210/1211 which required external pullup resistors, the PCI1410 has integrated all of
these pullup resistors.
SIGNAL NAME
PIN NUMBER
PGE
GGU
GHK
ADDR14/CPERR
C13
104
F14
READY/CINT
D6
132
A10
ADDR15/CIRDY
A12
110
C15
CD1/CCD1
L12
75
L19
VS1/CVS1
C6
131
F11
ADDR19/CBLOCK
D11
103
E19
ADDR20/CSTOP
C12
105
E18
ADDR21/CDEVSEL
B13
107
E17
ADDR22/CTRDY
A13
109
A16
VS2/CVS2
D9
117
E13
RESET/CRST
B9
119
F12
WAIT/CSERR
A5
133
B10
INPACK/CREQ
B8
123
E12
BVD2(SPKR)/CAUDIO
B5
134
C10
BVD1(STSCHG)/CSTSCHG
C5
135
E10
CD2/CCD2
A4
137
A9
3.5.7
SPKROUT and CAUDPWM Usage
SPKROUT carries the digital audio signal from the PC Card to the system. When a 16-bit PC Card is configured for
I/O mode, the BVD2 terminal becomes SPKR. This terminal is also used in CardBus binary audio applications, and
is referred to as CAUDIO. SPKR passes a TTL level digital audio signal to the PCI1410. The CardBus CAUDIO signal
also can pass a single-amplitude binary waveform. The binary audio signal from the PC Card socket is used in the
PCI1410 to produce SPKROUT. This output is enabled by bit 1 (SPKROUTEN) in the card control register (see
Section 4.32).
Older controllers support CAUDIO in binary or PWM mode but use the same terminal (SPKROUT). Some audio chips
may not support both modes on one terminal and may have a separate terminal for binary and PWM. The PCI1410
implementation includes a signal for PWM, CAUDPWM, which can be routed to an MFUNC terminal. Bit 2
(AUD2MUX) located in the card control register is programmed to route a CardBus CAUDIO PWM terminal to
CAUDPWM. See Section 4.30, Multifunction Routing Register for details on configuring the MFUNC terminals.
Figure 3–7 illustrates a sample application using SPKROUT and CAUDPWM.
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