RFM22 Datasheet, PDF (81/150 Pages) –

RFM22
Register 07h. Operating Mode and Function Control 1
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
swres
enlbd
enwt
x32ksel
txon
rxon
pllon
xton
Type
R/w
R/w
R/w
R/w
R/w
R/w
R/w
R/w
Reset value = 00000001
Bit
Name
Function
Software Register Reset Bit.
This bit may be used to reset all registers simultaneously to a DEFAULT state,
7
swres
without the need for sequentially writing to each individual register. The RESET
is accomplished by setting swres = 1. This bit will be automatically cleared.
Enable Low Battery Detect.
6
enlbd
When this bit is set to 1 the Low Battery Detector circuit and threshold
comparison will be enabled.
Enable Wake-Up-Timer.
Enabled when enwt = 1. If the Wake-up-Timer function is enabled it will operate
5
enwt
in any mode and notify the microcontroller through the GPIO interrupt when the
timer expires.
32,768 kHz Crystal Oscillator Select.
4
x32ksel
0: RC oscillator
1: 32 kHz crystal
TX on in Manual Transmit Mode.
Automatically cleared in FIFO mode once the packet is sent. Transmission can
3
txon
be aborted during packet transmission, however, when no data has been sent
yet, transmission can only be aborted after the device is programmed to
―unmodulated carrier‖ ("Register 71h. Modulation Mode Control 2").
RX on in Manual Receiver Mode.
2
rxon
Automatically cleared if Multiple Packets config. is disabled and a valid packet
received.
TUNE Mode (PLL is ON).
1
pllon
When pllon = 1 the PLL will remain enabled in Idle State. This will for faster
turn-around time at the cost of increased current consumption in Idle State.
0
xton
READY Mode (Xtal is ON).
81
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