CMOSTEK CMT2300A - Operation State

CMT2300A
Rev 1.0 | Page30/46
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POR
VDD
POR Release
<= 1 ms
XTAL Stablize
<= 2.5 ms
Block Calibrations
<= 6.5 ms
Enters the SLEEP State Ready
for customer initializing
XTAL Start up
<= N ms
Figure 15. Power on sequence
When the calibration is completed, the chip enters the SLEEP mode. From this time, the MCU can switch the chip to different
operating states by setting the register CHIP_MODE_SWT<7:0>.
5.3.2 OperationState
CMT2300A has 7 operationstates:IDLE, SLEEP, STBY, RFS, RX, TFS and TX, as shown below.
Table 16. CMT2300A state and module open table
State
Binary code
Switch command
Active Blocks
Optional Blocks
IDLE
0000
soft_rst
SPI, POR
None
SLEEP
0001
go_sleep
SPI, POR, FIFO
LFOSC, Sleep Timer
STBY
0010
go_stby
SPI, POR, XTAL, FIFO
CLKO
RFS
0011
go_rfs
SPI, POR, XTAL, PLL, FIFO
CLKO
TFS
0100
go_tfs
SPI, POR, XTAL, PLL, FIFO
CLKO
RX
0101
go_rx
SPI, POR, XTAL, PLL, LNA+MIXER+IF, FIFO
CLKO, RX Timer
TX
0110
go_tx
SPI, POR, XTAL, PLL, PA, FIFO
CLKO