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Chapter 3
Signals and Pinout Tables
COM 830
Reference Manual
45
Boot Strap Signals
Table 3-24. Boot Strap Signal Descriptions
Signal
Description of Boot Strap Signal
I/O
PU/PD
Comment
AC_SYNC
AC ’97/Intel
®
High Definition
Audio Sync:
This signal is a 48 kHz
fixed rate sample sync to the
codec(s). It is also used to encode
the stream number.
O 3.3V
AC_SYNC is
a boot strap
signal (see
caution
statement
below)
AC_SDOUT
AC ’97/Intel High Definition
Audio Serial Data Out:
This signal
is the 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
Audio.
O 3.3V
AC_SDOUT
is a boot strap
signal (see
caution
statement
below)
ATA_ACT#
ATA (parallel and serial) or SAS
activity indicator, active low.
OC 3.3V
ATA_ACT# is
a boot strap
signal (see
caution
statement
below)
SPKR
Output for audio enunciator, the
"speaker" in PC-AT systems
O 3.3V
SPEAKER is
a boot strap
signal (see
caution
statement
below)
PEG_LANE_RV#
PCI Express Graphics lane reversal
input strap. Pull low on the carrier
board to reverse lane order. Be
aware that the SDVO lines that
share this interface do not
necessarily reverse order if this
strap is low.
I 1.05V
PEG_LANE_
RV# is a boot
strap signal
(see caution
statement
below)
SDVO_I2C_DAT
(SDVO_DATA)
SDVO I²C data line to set up SDVO
peripherals.
I/O OD
2.5V
SDVO_I2C_D
AT is a boot
strap signal
(see caution
statement
below)
Summary of Contents for COM 830
Page 1: ...COM 830 Computer On Module Reference Manual P N 5001829A Revision A ...
Page 10: ...Chapter 1 About This Manual 4 Reference Manual COM 830 ...
Page 90: ...Chapter 4 BIOS Setup Description 84 Reference Manual COM 830 ...
Page 92: ...Appendix A Technical Support 86 Reference Manual COM 830 ...