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| MRF89XAM8A-I Datasheet, PDF (108/140 Pages) Microchip Technology – Ultra Low-Power, Integrated ISM Band Sub-GHz Transceiver | |||
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MRF89XA
5.3 Switching Times and Procedures
As an ultra low-power device, the MRF89XA can be
configured for low minimum average power consump-
tion. To minimize consumption the following optimized
transitions between modes are shown.
5.3.1 OPTIMIZED RECEIVE CYCLE
The lowest-power RX cycle is shown in Figure 5-1.
FIGURE 5-1:
MRF89XA
IDD
OPTIMIZED RX CYCLE
IDDRX
3.0 mA typ.
IDDFS
1.3 mA typ.
IDDST
65 µA typ.
IDDSL
100 nA typ.
RX
Time
Wait
TSWRF
MRF89XA can be put in
Any other mode
Receiver is ready:
- RSSI sampling is valid after a 1/fdev period
- Received data is valid
Wait
TSOSC
Wait
TSFS
Set MRF89XA in RX mode
Wait for Receiver settling
Set MRF89XA in FS mode
Wait for PLL settling
Set MRF89XA in Stand-by mode
Wait for XO settling
Note 1: If the lock detect indicator is available on an external interrupt pin of the companion microcontroller, it can be used to optimize
TSFS, without having to wait the maximum specified TSFS.
DS70622C-page 108
Preliminary
© 2010â2011 Microchip Technology Inc.
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