Si4012-C1-GT Silicon Laboratories Inc, Si4012-C1-GT Datasheet - Page 23

• Manufacturer Part Number: Si4012-C1-GT
• Description: RF Transmitter 27-960 MHz RF Transmitter
• Manufacturer: Silicon Laboratories Inc

5.1.5. COMMAND: CHANGE_STATE
Tune with
Notes:
Standby
Sensor
without
Mode
Shut-
down
Tune
XO
XO
1. The LC, DIV and PA are turned on as needed during the Tune operation.
2. See the tune section from Tune Start to PA Tune in the charts below for current consumption in Tune with XO and Tune
3. The current consumption at Standby and Sensor does not include the power consumed by the internal XO circuitry. XO
4. The response time assumes external XO stays enabled prior to TX.
Purpose:
ARG:
DATA:
without XO.
should be turned off with SET_PROPERTY/CHIP_CONFIG to save power if external XO is not used or if tuning is not
happening soon when external XO is present.
Digital
LDO
OFF
ON


SMBUS
State[1:0] - state to transition to.
IdleMode[2:0] – IDLE mode if changing to idle state.
Change state to IDLE or SHUTDOWN. The device will change to the specified state at the
earliest time possible. If changing into IDLE state, ARG2 specifies the idle mode.
None
OFF
ON
ON
ON
ON
SLOW
FAST
FAST
FAST
CLK
SYS
OFF
Circuit Blocks
00 IDLE
01 SHUTDOWN
10 - 11
011 – 111
000 Standby
001 Sensor
010 Tune
LBD LC XTAL DIV
OFF OFF
OFF OFF
OFF ON
OFF ON
ON
OFF
1
1
OFF
OFF
OFF
OFF
ON
Table 9.
– Go to idle mode state using the idle mode specified.
– Low Power State
– Enable Low Battery Detector
– Periodic tuning
– Reserved
– Go to shutdown state.
– Reserved.
Rev 0.2
OFF OFF
OFF OFF 600 µA
OFF OFF 610 µA
ON
ON
1
1
ON
ON
PA
1
1
15 nA
Note
Note
I
VDD
2
2
3
3
(without XO)
Time to TX
Response
22.2 ms
6.6 ms
6.6 ms
370 µs
—
Response Time
(with XO Early
Si4012
Enable)
22.2 ms
6.6 ms
6.6 ms
370 µs
to TX
—
4
4
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