MRF24XA_15 Datasheet, PDF (92/258 Pages) Microchip Technology – Low-Power, 2.4 GHz ISM-Band IEEE 802.15.4™ RF

MRF24XA
23: Transition after packet reception is over or MCU
.
clears RXEN bit
TABLE 4-1: TRANSITION TIMES
Starting State
Destination State
Radio internal tasks
Typ. Transition Time.
Power OFF
Radio OFF
Pin Reset
Radio OFF, IDLE, RX
DEEP SLEEP
Radio OFF
DEEP SLEEP
Radio OFF
DEEP SLEEP
RX
Regulator, XTAL ramp up and Calibra- 1.6 ms⁽¹⁾
tion
XTAL ramp up, Calibration
1.4 ms⁽¹⁾
Save registers, shut down 1V2 LDO 45 ms⁽²⁾
Regulator and XTAL ramp up, register 1.6 ms⁽¹⁾
recovery
Regulator and XTAL ramp up, register 1.65 ms⁽¹⁾
recovery, synthesizer on
Radio OFF
RX Listen
Synthesizer ramp up, Power on RX
front end
57 µs
Radio OFF
TX Frame
Synthesizer ramp up, Power on TX
front end
52 µs
IDLE
RX Listen
Power on RX front end
6.8 µs
IDLE
TX Frame
Power on TX front end
1.3 µs
Radio OFF
SLEEP
SLEEP
Radio OFF
Crystal power off
Crystal ramp up
25 µs
1.4 ms⁽¹⁾
Note 1: XTAL ramp up time is depending on temperature. Minimum values 1 ms, typical value 1.4 ms, maximum
value 3 ms
2: This time is referring to the complete discharge time on the internally regulated 1V2 bus and may depend
on the actual capacitance on this network.
FIGURE 4-2:
TRANSITION FROM DEEP SLEEP TO RX LISTEN POWER-SAVE MODE
LNA ramp up: 6 µsec at 13,5mA
RX Listen
Synthesiser ON: 50 µsec at 7mA
XTAL ramp up: 1400 µsec at 1,1mA
1V2 regulator ramp up: 200 µsec at
0,3mA
Deep Sleep: 40nA
DS70005023C-page 92
Preliminary
 2015 Microchip Technology Inc.