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Chapter 2
HARDWARE INSTALLATION
User's Manual |
AL701
Miscellaneous Signals
Signal
Pin#
Pin Type
Pwr Rail /Tolerance AL701
Carrier Board
Description
WDTRIG#_C
70
I CMOS
3.3V/3.3V
PU 10K to 3.3V
Watchdog trigger signal. This signal restarts the watchdog timer of the
Qseven module on the falling edge of a low active pulse.
WDOUT_C
72
O CMOS
3.3V/3.3V
PU 10K to 3.3V
Watchdog event indicator. High active output used for signaling a
missing watchdog trigger. Will be deasserted by software, system reset
or a system power down.
I2C_SCL1
66
I/O OD CMOS3.3V/3.3V
PU 2.2K to 3.3V
General Purpose I²C bus #0 clock line.
I2C_SDA1
68
I/O OD CMOS3.3V/3.3V
PU 2.2K to 3.3V
General Purpose I²C bus #0 data line.
SMBCK_BTB
60
I/O OD CMOS3.3V Suspend/3.3V PU 2.2K to 3.3V Suspend
Clock line of System Management Bus.
Multiplexed with General Purpose I²C bus #1 clock line.
SMBDAT_BTB
62
I/O OD CMOS3.3V Suspend/3.3V PU 2.2K to 3.3V Suspend
Data line of System Management Bus.
Multiplexed with General Purpose I²C bus #1 data line.
SMB_ALERT-_EC_BTB
64
I/O OD CMOS3.3V Suspend/3.3V PU 10K to 3.3V Suspend
System Management Bus Alert input. This signal may be driven low by
SMB devices to signal an event on the SM Bus.
HDA_SPKR_3V3
194
O CMOS
3.3V/3.3V
Primary functionality is output for audio enunciator, the“speaker” in PC
AT systems. When not in use for this primary purpose it can be used as
General Purpose PWM Output.
BIOS_DIS0-
41
I CMOS
3.3V/3.3V
PU 10K to 3.3V
Module BIOS disable input signal. Pull low to disable module’s on-board
BIOS.
Allows off-module BIOS implementations. This signal can also be used
to disable standard boot firmware flash device and enable an alternative
boot firmware source, for example a boot loader.
RSVD
52,53,54,55
NC
Do not connect
GP_1-Wire_Bus
124
I/O CMOS
3.3V/3.3V
General Purpose 1-Wire bus interface. Can be used for consumer
electronics control bus (CEC) of HDMI
GPIO0_C
19
O CMOS
CMOS 3.3V
General Purpose Output 0
SDIO_LED
44
O CMOS
3.3V Suspend
Use a GPIO programmed to indicate the state of the hostcontrol1.
hostctrl1_ledcontrol register bit.
Manufacturing Signals
Signal
Pin#
Pin Type
Pwr Rail /Tolerance AL701
Carrier Board
Description
EC_CTS0# / JTAG_TCK
207
N.A
N.A
This pin is reserved for manufacturing and debugging purposes.
May be used as JTAG_TCK signal for boundary scan purposes during
production or as a vendor specific control signal. When used as a vendor
specific control signal the multiplexer must be controlled by the MFG_
NC4 signal.
Or UART_CTS
EC_SOUT0 / JTAG_TDO
209
N.A
N.A
This pin is reserved for manufacturing and debugging purposes.
May be used as JTAG_TDO signal for boundary scan purposes during
production. May also be used, via a multiplexer, as a UART_TX signal to
connect a simple UART for firmware and boot loader implementations. In
this case the multiplexer must be controlled by the MFG_NC4 signal.
