mrf89xa Microchip Technology Inc., mrf89xa Datasheet - Page 112

• Manufacturer Part Number: mrf89xa
• Description: Ultra-low Power, Integrated Ism Band Sub-ghz Transceiver
• Manufacturer: Microchip Technology Inc.

MRF89XA
5.3
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
The lowest-power RX cycle is shown in Figure 5-1.
FIGURE 5-1:
DS70622B-page 112
3.0 mA typ.
1.3 mA typ.
100 nA typ.
MRF89XA
65 µA typ.
Note 1:
IDDRX
IDDFS
IDDST
IDDSL
IDD
Switching Times and Procedures
OPTIMIZED RECEIVE CYCLE
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.
TSOSC
Set MRF89XA in Stand-by mode
Wait for XO settling
Wait
OPTIMIZED RX CYCLE
TSFS
Wait
Set MRF89XA in FS mode
Wait for PLL settling
TSWRF
Wait
Preliminary
Set MRF89XA in RX mode
Wait for Receiver settling
Time
RX
Receiver is ready:
- RSSI sampling is valid after a 1/
- Received data is valid
© 2010 Microchip Technology Inc.
MRF89XA can be put in
Any other mode
f
dev period