10 Module Types; 10.1 Master Module; 10.2 Slave Module - Siemens 1218RF User Manual

10 Module types

Two 1218RF modules are available: One that acts a master and one that acts as a slave. The slave module supports
antenna diversity.

10.1 Master module

The master module dictates the sample rate and decides which RF channels are used. The following connections are
required on the master:
Pin Signal Direction
P3V3 P3V3 Input
RSTN RSTN Input
AD1 AD1 Output
BCLK BCLK Output
WCLK WCLK Output
MCLK MCLK Output
GIO2 GIO2 Output
SCK SCK Input
GIO1 GIO1 Input
MISO MISO Output
MOSI MOSI Input
CSN CSN Input

10.2 Slave module

The slave module derives its sample rate from the wireless interface. The following connections are required on the
slave:
Pin Signal Direction
P3V3 Input
RSTN Input
AD1 Output
BCLK Output
WCLK Output
MCLK Output
GIO2 Output
SCK Input
GIO1 Input
MISO Output
MOSI Input
CSN Input
1218RF USER'S MANUAL
Function
3.3V power supply
Module reset
I2S data
I2S data clock
I2S word clock
I2S Master clock
Audio device reset
SPI clock
SPI select
SPI data (slave out)
SPI data (slave in)
Network pairing start
Function
3.3V power supply
Module reset
I2S data
I2S data clock
I2S word clock
I2S Master clock
Audio device reset
SPI clock
SPI select
SPI data (slave out)
SPI data (slave in)
Network pairing start
PAGE 8 OF 9