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12048231 Rev. 00 (Draft)
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4.12. SPI0 Socket / Pin-header
Reference Designator: J43
Description
The J43 connector provides SPI1 interface of the SMARC module to an 8-pin 1.27mm SMT pin-header.
Interfaces used
SPI1 Interface of the SMARC module,
CMOS 1.8V
signal characteristics
Connector drawing and contact-numbering scheme
Figure 21 SPI socket / pin-header
– J43
Pinout
J43
Pin
Signal / Function
Pin Type
Signal Description
1
SPI1_CS#
I (CMOS 1.8V)
Chip select input
2
SPI1_MISO
O (CMOS 1.8V)
Slave data output
3
SPI1_IO2
IO (CMOS 1.8V)
Device write protection
4
GND
GND
Connected to ground potential of the PCB
5
SPI1_MOSI
I (CMOS 1.8V)
Slave data input
6
SPI1_CLK
I (CMOS 1.8V)
Serial clock input
7
SPI1_IO3
IO (CMOS 1.8V)
Hold or reset input
8
VCC
Power 1.8V (S5)
Power supply for attached device; max. current 25mA.
