SLOS758G December 2011 – March 2020 TRF7963A
Table 4-1 describes the signals.
|1||VDD_A||OUT||Internal regulated supply (2.7 V to 3.4 V) for analog circuitry|
|2||VIN||SUP||External supply input to chip (2.7 V to 5.5 V)|
|3||VDD_RF||OUT||Internal regulated supply (2.7 V to 5 V); normally connected to VDD_PA (pin 4)|
|4||VDD_PA||INP||Supply for PA; normally connected externally to VDD_RF (pin 3)|
|5||TX_OUT||OUT||RF output (selectable output power: 100 mW or 200 mW, with VDD = 5 V)|
|6||VSS_PA||SUP||Negative supply for PA; normally connected to circuit ground|
|7||VSS_RX||SUP||Negative supply for receive inputs; normally connected to circuit ground|
|8||RX_IN1||INP||Main receive input|
|9||RX_IN2||INP||Auxiliary receive input|
|10||VSS||SUP||Chip substrate ground|
|11||BAND_GAP||OUT||Bandgap voltage (VBG = 1.6 V); internal analog voltage reference|
|12||ASK/OOK||BID|| Selection between ASK and OOK modulation (0 = ASK, 1 = OOK) for direct mode 0 and 1.
It can be configured as an output to provide the received analog signal output.
|14||MOD||INP||External data modulation input for direct mode 0 or 1|
|OUT||Subcarrier digital data output (see register 0x1A and 0x1B definitions)|
|15||VSS_A||SUP||Negative supply for internal analog circuits. Connected to GND.|
|16||VDD_I/O||INP||Supply for I/O communications (1.8 V to VIN) level shifter. VIN should be never exceeded.|
|17||I/O_0||BID||I/O pin for parallel communication|
|18||I/O_1||BID||I/O pin for parallel communication|
|19||I/O_2||BID||I/O pin for parallel communication|
|20||I/O_3||BID||I/O pin for parallel communication|
|21||I/O_4||BID|| I/O pin for parallel communication
Slave select signal in SPI mode
|22||I/O_5||BID|| I/O pin for parallel communication
Data clock output in direct mode 1
|23||I/O_6||BID|| I/O pin for parallel communication
MISO for serial communication (SPI)
Serial bit data output in direct mode 1 or subcarrier signal in direct mode 0
|24||I/O_7||BID|| I/O pin for parallel communication.
MOSI for serial communication (SPI)
|25||EN2||INP||Selection of power down mode. If EN2 is connected to VIN, then VDD_X is active during power down mode 2 (for example, to supply the MCU).|
|26||DATA_CLK||INP||Data clock input for MCU communication (parallel and serial)|
|27||SYS_CLK||OUT|| If EN = 1 (EN2 = don't care) the system clock for the MCU is configured with register 0x09 (off, 3.39 MHz, 6.78 MHz, or 13.56 MHz).
If EN = 0 and EN2 = 1, the system clock is set to 60 kHz.
|28||EN||INP||Chip enable input (if EN = 0, then the chip is in sleep or power-down mode)|
|29||VSS_D||SUP||Negative supply for internal digital circuits|
|30||OSC_OUT||OUT||Crystal or oscillator output|
|31||OSC_IN||INP||Crystal or oscillator input|
|32||VDD_X||OUT||Internally regulated supply (2.7 V to 3.4 V) for digital circuit and external devices (for example, an MCU)|
|PAD||PAD||SUP||Chip substrate ground|