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G
Signal Definitions
(Continued)
DCD#
AE12
I
Data Carrier Detected.
When low, indicates that the
data transfer device (e.g., modem) is ready to establish a
communications link.
GPIO9+
IDE_IOW1#+
F_IRDY#
DSR#
AF12
I
Data Set Ready.
When low, indicates that the data trans-
fer device (e.g., modem) is ready to establish a communi-
cations link.
GPIO10+
IDE_IORDY1+
F_FRAME#
IRRX1
AE18
I
IR Receive
. Primary input to receive serial data from the
IR transceiver. Monitored during power-off for wakeup
event detection.
GPIO16+
PC_BEEP+
F_DEVSEL
IRTX
C20
O
IR Transmit
. IR serial output data.
GXCLK+TEST3
2.4.10 AC97 Audio Interface Signals
Signal Name
Ball No.
Type
Description
Mux
BIT_CLK
AC22
I
Audio Bit Clock.
The serial bit clock from the codec.
F_TRDY#
SDATA_OUT
AD22
O
Serial Data Output.
This output transmits audio serial
data to the codec.
CLKSEL2 (Strap)
SDATA_IN
AF22
I
Serial Data Input.
This input receives serial data from
the primary codec.
F_GNT0#
SYNC
AE22
O
Serial Bus Synchronization.
This bit is asserted to syn-
chronize the transfer of data between the SC1100 and
the AC97 codec.
CLKSEL3 (Strap)
AC97_CLK
AC21
O
Codec Clock.
It is twice the frequency of the Audio Bit
Clock.
---
AC97_RST#
AF23
O
Codec Reset.
S3 to S5 wakeup is not supported
because AC97_RST# is powered by V
IO
. If wakeup from
states S3 to S5 are needed, a circuit in the system board
should be used to reset the AC97 codec.
F_STOP
PC_BEEP
AE18
O
PC Beep.
Legacy PC/AT speaker output.
GPIO16+IRRX1+
F_DEVSEL#
2.4.11 Power Management Interface Signals
Signal Name
Ball No.
Type
Description
Mux
GPWIO0
AC15
I/O
General Purpose Wakeup I/Os.
These signals each
have an internal pull-up of 100 K
.
---
GPWIO1
AE16
I/O
---
GPWIO2
AF17
I/O
---
ONCTL#
AD15
O
On / Off Control.
This signal indicates to the main power
supply that power should be turned on. This signal is an
open-drain output.
---
2.4.9
Serial Port (UART) and Infrared (IR) Interface Signals (Continued)
Signal Name
Ball No.
Type
Description
Mux