
46
42073A-MCU Wireless-02/13
ATmega2564/1284/644RFR2
9.4.1.4.5 State Transition Timing Summary
Table 9-4. Radio Transceiver State Transition Timing
No
Symbol
Transition
Time [s], (typ)
Comments
1
tTR2
SLEEP
TRX_OFF
240
Depends on crystal oscillator setup (CL = 10 pf)
TRX_OFF state indicated by TRX24_AWAKE interrupt
2
tTR3
TRX_OFF
SLEEP
35 1 / fCLKM
For fCLKM > 250 kHz
3
tTR4
TRX_OFF
PLL_ON
110
Depends on external capacitor at AVDD (1 F nom)
4
tTR5
PLL_ON
TRX_OFF
1
5
tTR6
TRX_OFF
RX_ON
110
Depends on external capacitor at AVDD (1 F nom)
6
tTR7
RX_ON
TRX_OFF
1
7
tTR8
PLL_ON
RX_ON
1
8
tTR9
RX_ON
PLL_ON
1
Transition time is also valid for TX_ARET_ON, RX_AACK_ON
9
tTR10
PLL_ON
BUSY_TX
16
When setting bit SLPTR or TRX_CMD = TX_START, the first
symbol transmission is delayed by 16 s (PLL settling and
PA ramp up).
10
tTR11
BUSY_TX
PLL_ON
32
PLL settling time from TX_BUSY to PLL_ON state
11
tTR12
All modes
TRX_OFF
1
Using TRX_CMD = FORCE_TRX_OFF (see register
TRX_STATE),
Not valid for SLEEP state
12
tTR13
RESET
TRX_OFF
37
Not valid for SLEEP state
13
tTR14
Various
states
PLL_ON
1
Using TRX_CMD = FORCE_PLL_ON (see register
TRX_STATE),
Not valid for SLEEP, RESET and TRX_OFF
The state transition timing is calculated based on the timing of the individual blocks
shown in Table 9-9 on page 55. The worst case values include maximum operating
Table 9-9. Analog Block Initialization and Settling Time
No
Symbol Block
Time [s], (typ)
Time [s], (max) Comments
15
tTR15
XOSC
215
1000
Leaving SLEEP state, depends on crystal Q factor and load
capacitor
16
tTR16
FTN
25
FTN tuning time, fixed
17
tTR17
DVREG
60
1000
Depends on external bypass capacitor at DVDD
(CB3 = 1 F nom., 10 F worst case), depends on VDEVDD
18
tTR18
AVREG
60
1000
Depends on external bypass capacitor at AVDD
(CB1 = 1 F nom., 10 F worst case) , depends on VEVDD
19
tTR19
PLL, initial
110
155
PLL settling time TRX_OFF
PLL_ON, including 60 s
AVREG settling time
20
tTR20
PLL, settling
11
24
Settling time between channel switch
21
tTR21
PLL, CF cal
22
tTR22
PLL, DCU cal
23
tTR23
PLL, RX
TX
16
Maximum PLL settling time RX
TX