Figure 8 display the highlighted 9 pin connector J304 on bottom side of SoM_IoT_1V2 2V0 printed circuit board. This connector allocate the large-scale integrated circuit R-IN32M3-EC with external SPI and additional SYNC signals. Furthermore the power supply pins VCC33 and GROUND are connected on J202.
Timer Array Unit signals.
Pin 19 has chip select (CS) function for (TAUJ2_CH0) Timer Array Unit channel 0. This pin can be used as input TAUJ2TTIN0 or as output TAUJ2TTOUT0. This pin is multiplexed on port P27 of R-IN32M3-EC Clocked Serial Interface H (CSIH) which works in Slave Mode at CSIH channel 0. The used chip select sink for this . For interrupts and peripheral modulessee also User’s Manual R18UZ0007EJ1100 chapter 14 Timer Array Unit (TAUJ2)
Pin 20 (TAUJ2_CH1) Timer Array Unit channel 1. This pin can be used as input TAUJ2TTIN1 or as output TAUJ2TTOUT1. This pin is multiplexed on port P26 of R-IN32M3-EC based module is Port P70, Port P71 drives permanently to GND level.
Pin 20 connect the RESETZ ball 21 (TAUJ2_CH2) Timer Array Unit channel 2. This pin can be used as input TAUJ2TTIN2 or as output TAUJ2TTOUT2. This pin is multiplexed on port P57 of R-IN32M3-EC. So an external reset signal can initialize the CPU core and the internal peripheral modules
Pin 22 (GND) optional Ground
Pin 23 (SPI_RST1) is used as reset input for the Clocked Serial Interface H 1 and is internally connected to R-IN32M3-EC Port P75.
Pin 2124 (SPI_SCK1) complies the MISO SCK function for SPI connection. This pin channel 1 CSIHTSCK signal connect the serial clock of R-IN32M3-EC CSIH serial data output signal at Port P47 (CSISO0).at Port P35. For interrupts and peripheral modulessee also User’s Manual R18UZ0007EJ1100 chapter 17 Clocked Serial Interface H (CSIH)
Pin 2225 (SPI_MOSI1) complies the MOSI function for SPI connection. This pin connect the R-IN32M3-EC CSIH serial data input signal at Port P46 P36 (CSISI0CSISI1).
Pin 2326 (SPI_MISO1) complies the SCK MISO function for SPI connection. This channel 0 CSIH signal pin connect the serial clock of R-IN32M3-EC serial data output signal at Port P45.
Pin 24 (CATSYNC0) connect Port P11 of R-IN32M3-EC and is able to use as GPIO or EtherCAT Sync0 signal connectionP37 (CSISO1).
Pin 2527 (CATSYNC1) connect Port P10 of R-IN32M3-EC and is able to use as GPIO or EtherCAT Sync1 signal connection.
Pin 26 (CATSYNC1) connect Port P10 of SPI_CS1) has chip select (CS) function for R-IN32M3-EC and is able to use as GPIO or EtherCAT Sync1 signal connection.
Pin 27 (CATSYNC1) connect Port P10 of Clocked Serial Interface H 1 (CSIH1) which works in Slave Mode at CSIHTCSS1 channel 1. The used chip select sink for this R-IN32M3-EC and is able to use as GPIO or EtherCAT Sync1 signal connectionbased module is Port P72.