Getac 9270D Service Manual page 121

4.15 Intel® High Definition Audio Link Signals –Table 1
Name
HDA_RST#
HDA_SYNC
HDA_BCLK
HDA_SDO
HDA_SDIN
[3:0]
Type
Intel® High Definition Audio Reset: Master hardware reset
O
to external codec(s).
Intel High Definition Audio Sync: 48 kHz fixed rate sample
sync to the codec(s). Also used to encode the stream number.
O NOTE: This signal is sampled as a functional strap. See
Section 4.30 for more details.There is a weak integrated pull-
down resistor on this pin.
Intel High Definition Audio Bit Clock Output: 24.000 MHz
serial data clock generated by the Intel High Definition Audio
O
controller (the Ibex Peak). This signal has a weak internal pull-
down resistor.
Intel High Definition Audio Serial Data Out: Serial TDM
data output to the codec(s). This serial output is double-
pumped for a bit rate of 48 Mb/s for Intel High Definition
O Audio.
NOTE: This signal is sampled as a functional strap. See
Section 4.30 for more details.There is a weak integrated pull-
down resistor on this pin.
Intel High Definition Audio Serial Data In [3:0]: Serial
TDM data inputs from the codecs. The serial input is single-
pumped for a bit rate of 24 Mb/s for Intel® High Definition
I Audio. These signals have integrated pull-down resistors,
which are always enabled.
NOTE: During enumeration, the Ibex Peak will drive this
signal. During normal operation, the CODEC will drive it.
Description