Acer AcerNote 970 Service Manual page 148

Table 2-14 CL-PD6730 Pin Descriptions (continued)
Pin Name
Power Control and General Interface Pins
SPKR_OUT't Speaker Output: This output can be used as a
digital output to a speaker to allow a system to
support PC Card fax/modem/voice and audio sound
output. (for the socket whose speaker signal is to
be directed from BVD2/-SPKR/-LED to this pin).
This pin is used for configuration information during
hardware reset.
LED_OUT*t LED Output: This output can be used as an LED
driver to indicate disk activity when a socket's
BVD2/-SPKR/-LED pin has been programmed for
LED support. BVD2/-SPKR/-LED pin to reflect disk
activity. This pin is used for configuration
information during hardware reset.
\SCLK Serial Clock: This input is used as a reference
clock (10-100 kHz, usually 32 kHz) to control the
serial interface of the socket power control chips.
CAUTION: This pin must be driven at all times.
SDATA/ Serial Data / System Management Bus Data:
SMBDATA This pin serves as output pin SDATA when used
with the serial interface of Texas Instruments'
TPS22021DF socket power control chip, and serves
as a bidirectional pin SMBDATA when used with
Intel's System Management Bus used by Maxim's
socket power control chip. This pin is used for
configuration information during hardware reset.
SLATCH/ Serial Latch / System Management Bus Clock:
SMBCLKt This pin serves as output pin SLATCH when used
with the serial interface of Texas Instruments'
TPS22021DF socket power control chip, and
serves as a bidirectional pin SMBCLK hen used
with Intel's System Management Bus used by
Maxim's socket power control chip. This pin is used
for configuration information during hardware reset.
Description Pin Number I/O
128 I/O-PU
133 I/O-PU
132
131 I/O-PU
130 I/O-PU
Power
4
4
2 or 3
2 or3