• 07/14/2017
  • Public Content
Contents

SPI Serial Peripheral Interface

A 25-MHz SPI bus (SPI_1) is available on the J6 connector with three slave selects and another 25-MHz SPI bus (SPI_0) with two slave selects on the J7 connector. The bus speed is 25 MHz in master mode and 16.67 MHz in slave mode.
In a single-frame transfer, the SoC supports all four possible combinations for the serial clock phase and polarity. In multiple frame transfer, the Intel® Joule™ module supports only a clock phase setting of 1.
SPI bus usage example
Note: The SPI interfaces operate 1.8 VDC levels.
Signal
Module Connector.Pin
Pin Direction
Use
SPI_0_CLK
J7.59
Input
SPI 0 clock
SPI_0_MOSI
J7.57
Input
SPI 0 master out/slave in
SPI_0_MISO
J7.59
Output
SPI 0 master in/slave out
SPI_0_FS0
J7.77
Input
SPI 0 slave select 0
SPI_0_FS1
J7.79
Input
SPI 0 slave select 1
SPI_0_FS2
J7.53
Input
SPI 0 slave select 2
SPI_1_CLK
J6.53
Input
SPI 1 clock
SPI_1_MOSI
J6.51
Input
SPI 1 master out/slave in
SPI_1_MISO
 
J6.63
Output
SPI 1 master in/slave out
SPI_1_FS0
J6.55
Input
SPI 1 slave select 0
SPI_1_FS2
J6.14
Input
SPI 1 slave select 1
Note: Refer to Serial Peripheral Interface Specifications for additional electrical specifications.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.