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

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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

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