6.2 Inter-Die signal description

Table 6-2. RF212B signals bonded inside the SIP
Signal Name Function Type Signal is connected to
DIG3

1. RX/TX Indication

2. If disabled, pull-down enabled (AVSS)

Digital output RFCTRL
DIG4

1. RX/TX Indication (DIG3 inverted)

2. If disabled, pull-down enabled (AVSS)

Digital output RFCTRL
/RST Chip reset; active low Digital input L21 PB15
DIG1

1. Antenna Diversity RF switch control

2. If disabled, pull-down enabled (DVSS)

Digital output RFCTRL
DIG2

1. Antenna Diversity RF switch control (DIG1 inverted)

2. RX Frame Time Stamping

3. If functions disabled, pull-down enabled (DVSS)

Digital output RFCTRL
SLP_TR Controls sleep, transmit start, and receive states; active high Digital input L21 PA20
CLKM Master clock signal output; low if disabled Digital output L21 PC16
SCLK SPI clock Digital input L21 PC18
MISO SPI data output (master input slave output) Digital output L21 PC19
MOSI SPI data input (master output slave input) Digital input L21 PB30
/SEL SPI select, active low Digital input L21 PB31
IRQ

1. Interrupt request signal; active high or active low; configurable

2. Frame Buffer Empty Indicator; active high

Digital output L21 PB00