ADLINK Technology cExpress-KL, Руководство пользователя

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cExpress-KL
Pinouts and Signal Descriptions
19
3.3.12. Miscellaneous
Signal Pin Description I/O PU/PD Comment
SPKR B32 Output for audio enunciator, the “speaker” in
PC-AT systems O 3.3V
WDT B27
Output indicating that a watchdog time-out
event has occurred.
O 3.3V
THRM# B35 Input from off-module temp sensor
indicating an over-temp situation. I 3.3V
THERMTRIP# A35 Active low output indicating that the CPU
has entered thermal shutdown.
O 3.3VSB
FAN_PWMOUT B101 Fan speed control. Uses the Pulse Width
Modulation (PWM) technique to control the
fan’s RPM. O OD 3.3V PU 2.2K 3.3V PD shall be on
the carrier board
FAN_TACHIN11
B102 Fan tachometer input for a fan with a two
pulse output. I OD 3.3V PU 10k 3.3V
TPM_PP A96 Trusted Platform Module (TPM) Physical
Presence pin. Active high. TPM chip has an
internal pull down. This signal is used to
indicate Physical Presence to the TPM. I 3.3V PD 1k 3.3V
PD is only
placed when
TPM is installed
on module
3.3.13. SMBus
Signal Pin Description I/O PU/PD Comment
SMB_CK B13 System Management Bus bidirectional
clock line. Power sourced through 5V
standby rail and main power rails. I/O OD
3.3VSB PU 8k2
3.3VSB
SMB_DAT# B14 System Management Bus bidirectional data
line. Power sourced through 5V standby rail
and main power rails. I/O OD
3.3VSB PU 8k2
3.3VSB
SMB_ALERT# B15 System Management Bus Alert – active low
input can be used to generate an SMI#
(System Management Interrupt) or to wake
the system. Power sourced through 5V
standby rail and main power rails.
I 3.3VSB
PU 2k2
3.3VSB
3.3.14. I2C Bus
Signal Pin Description I/O PU/PD Comment
I2C_CK B33 General purpose I²C port clock output/input I/O OD
3.3VSB
PU 2k2
3.3VSB Sourced from
SEMA BMC by
default (sourced
from SoC or PCH
by BOM option)
I2C_DAT B34 General purpose I²C port data I/O line I/O OD
3.3VSB PU 2k2
3.3VSB Sourced from
SEMA BMC by
default (sourced
from SoC or PCH
by BOM option)