Power Management Interface Signals - AMD Geode SC1200 Data Book

Signal Definitions
3.4.15 AC97 Audio Interface Signals
Signal Name Ball No.
BIT_CLK U30
SDATA_OUT P29
SDATA_IN U31
SDATA_IN2 AL8
SYNC P30
AC97_CLK P31
AC97_RST# U29
PC_BEEP V31
3.4.16

Power Management Interface Signals

Signal Name Ball No.
CLK32 AH8
GPWIO0 AH6
GPWIO1 AK5
GPWIO2 AJ6
LED# AL4
ONCTL# AJ5
AMD Geode™ SC1200/SC1201 Processor Data Book
Type Description
I Audio Bit Clock. The serial bit clock from the codec.
Note: If selected as BIT_CLK function but not used, tie
BIT_CLK low.
O Serial Data Output. This output transmits audio serial
data to the codec.
I Serial Data Input. This input receives serial data from
the primary codec.
Note: If selected as SDATA_IN function but not used,
tie SDATA_IN low.
I Serial Data Input 2. This input receives serial data from
the secondary codec. This signal has wakeup capability.
O Serial Bus Synchronization. This bit is asserted to syn-
chronize the transfer of data between the SC1200/
SC1201 processor and the AC97 codec.
O Codec Clock. It is twice the frequency of the Audio Bit
Clock.
O Codec Reset. S3 to S5 wakeup is not supported
because AC97_RST# is powered by V
states S3 to S5 are needed, a circuit in the system board
should be used to reset the AC97 codec.
O PC Beep. Legacy PC/AT speaker output.
Type Description
O 32.768 KHz Output Clock
I/O General Purpose Wakeup I/Os. These signals each
have an internal pull-up of 100 KΩ.
O LED Control. Drives an externally connected LED (on,
off or a 1 Hz blink). Sleeping / Working indicator. This sig-
nal is an open-drain output.
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.
32579B
F_TRDY#
TFT_PRSNT (Strap)
F_GNT0#
CLKSEL3 (Strap)
F_STOP#
. If wakeup from
IO
GPIO16+
F_DEVSEL#
Mux
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Mux
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65