Seco Smarc CSM-B79 User Manual page 67

3.3.21 FAN Connector
3-Wire FAN Connector CN56
Pin Signal
1 GND
2 FAN_POWER
3 FAN_TACHO_IN
CN55 position FAN_PWR Level
1-2 12V_RUN
2-3 5V_RUN
3.3.22 SPI interface
SPI Flash Socket
Pin Signal Pin
1 SPI0_CS1# 8
2 SPI0_DIN 7
3 10 -up 1.8V_ALW 6
4 GND 5
SPI header
Pin Signal Pin
1 SPI0_CS0# 2
3 SPI0_DIN 4
5 SPI0_WP# 6
7 GND 8
CSM-B79
CSM-B79 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.1 - Author: A.R - Reviewed by S.R. - Copyright © 2021 SECO S.p.A.
On CSM-B79 carrier board it is available a 3-pin connector, type MOLEX p/n 22-27-2031 or equivalent,
for the connection of tachometric FANs.
Mating connector: MOLEX 22-01-2035 receptacle with MOLEX 2759 or 4809 KK
FAN_POWER: FAN Power signal, PWM controlled for FAN speed by using GPIO5/PWM_OUT signal coming from
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SMARC module. Furthermore, the voltage level is selectable to be at 12V_RUN or 5V_RUN. Selection must be done
through a 3-way jumper, CN55.
FAN_TACHO_IN: FAN Tachometer Input signal for SMARC
According to SMARC
CN43
Peripheral Interfaces, coming out from SMARC
external SPI devices, included boot devices.
Signal
The first one is SPI0, while the second one, SPI1, does share the same pins with QSPI or eSPI
1.8V_ALW
interface.
10 -up 1.8V_ALW
The SPI0 interface available on SMARC
SPI0_CK
a SPI Flash Socket CN43, type LOTES p/n ACA-SPI-004-K01 or equivalent, and
SPI0_DOUT
on a dual-row 8-pin SMT male pin-header CN91, p. 1.27mm, type TOWNES
P1035-2*04MGF-084-A or equivalent, with pinout shown in the table on the left.
CN91
Signal description:
Signal
SPI0_DIN: SMARC
1.8V_ALW
SPI0_DOUT: SMARC
SPI0_CS0#
SPI0_CK: SMARC
SPI0_CK
SPI0_CS0#: SMARC
SPI0_DOUT
SPI0_CS1#: SMARC
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module
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Rel. 2.1.1 specification, SMARC
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card edge connector, for the connection of
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card edge connector is available both on
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module SPI0 Master input / Slave output, also referred to as MISO
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module SPI0 Master output / Slave input, also referred to as MOSI
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module SPI0 Clock
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module SPI0 Master Chip Select 0, active low output signal
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module SPI0 Master Chip Select 1, active low output signal
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crimp terminals.
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modules foresee up two Serial
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