Si4432-B1-FMR EZRadioPRO FSK/OOK transceiver
EZRadioPRO FSK/OOK transceiver with SPI control, 30 MHz crystal oscillator interface, GPIOs, interrupt output and integrated 1.7 V regulators.
Aliase:Si4430-B1, Si4431-B1, Si4432-B1-FMR
QFN20 Top View
21 Pins
Pin-Tabelle21
| Pin | Signal / Name | Typ | Alternative Funktionen |
|---|---|---|---|
| 1 | VDD_RF | Power | RF supply input to analog 1.7 V regulators, +1.8 to +3.6 V |
| 2 | TX | Analog | PA open-drain transmit output |
| 3 | RXp | Analog | Differential RF LNA input (positive) |
| 4 | RXn | Analog | Differential RF LNA input (negative) |
| 5 | NC | NC | No connect |
| 6 | ANT | Digital | Antenna 2 / TR switch control output |
| 7 | GPIO_0 | Digital | Configurable GPIO (clock out, FIFO status, POR, WUT, LBD, TRSW) |
| 8 | GPIO_1 | Digital | Configurable GPIO (clock out, FIFO status, POR, WUT, LBD, TRSW) |
| 9 | GPIO_2 | Digital | Configurable GPIO (clock out, FIFO status, POR, WUT, LBD, TRSW) |
| 10 | VR_DIG | Power | Digital 1.7 V regulator output, 1 uF decoupling required |
| 11 | NC | NC | Internally tied to paddle; leave open or connect to GND only |
| 12 | VDD_DIG | Power | Supply input to digital 1.7 V regulator, +1.8 to +3.6 V |
| 13 | SDO | Digital | SPI serial data readback output |
| 14 | SDI | Digital | SPI serial data input |
| 15 | SCLK | Digital | SPI serial clock input |
| 16 | nSEL | Digital | SPI select input, also burst mode signal |
| 17 | nIRQ | Digital | Interrupt status output, active low |
| 18 | XOUT | Analog | Crystal oscillator output (30 MHz) |
| 19 | XIN | Analog | Crystal oscillator input (30 MHz), float if driven externally |
| 20 | SDN | Digital | Shutdown input, must be 0 except in shutdown mode |
| EP | PADDLE_GND | Ground | Exposed paddle, RF and circuit ground, must be soldered to PCB ground |