Operation State, Timing And Power Consumption; Startup Timing; Operation State - CMOSTEK CMT2310A Manual

5.3 Operation State, Timing and Power Consumption

5.3.1 Startup Timing

When the chip VDD is powered up, it usually needs to wait about 1 ms, then POR will release and chip stays in IDLE state with
no operations. When users send power_up command, the chip begins power up procedure to have calibration of all modules.
The chip stays in SLEEP mode after calibration done. Any time when reset occurs (including POR, hardware reset and software
reset), the chip will return to IDLE state then wait for users to send power_up command.

5.3.2 Operation State

The CMT2310A supports 7 operation states: IDLE, SLEEP, STBY, RFS, RX, TFS and TX, as shown in the figure below.
Table 15. CMT2310A State and Corresponding Active Module
State Binary code
IDLE 0x00
SLEEP 0x81
READY 0x82
RFS 0x84
TFS 0x88
RX 0x90
TX 0xA0
The time for switching between various states is listed in the table below.
Source State SLEEP
SLEEP
READY
Immediately
RFS Immediately
RX Immediately
TFS Immediately
TX Immediately
Notes:
In direct mode, if switching command is sent during transmission, it will exit Tx Immediately.
In packet mode, if switching command is sent during transmission, it will exit Tx after accomplishing current transmission.
Figure 23. Power-on Timing
Switch ommand
soft_rst SPI, POR
go_sleep SPI, POR
go_ready SPI, POR, XTAL, FIFO
go_rfs SPI, POR, XTAL, PLL, FIFO
go_tfs SPI, POR, XTAL, PLL, FIFO
go_rx SPI, POR, XTAL, PLL,
LNA+MIXER+ADC, FIFO
go_tx SPI, POR, XTAL, PLL,PA, FIFO
Table 16. State Switching Time
READY
660 us
Immediately
Immediately Immediately
Immediately Cannot switch
Immediately Cannot switch
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Active Modules
Destination State
RFS RX
770 us 820 us
110 us 160 us
20 us
Cannot switch
160 us
CMT2310A
Optional Moduels
None
LFOSC, FIFO, Sleep Timer
None
None
None
RX Timer
None
TFS
770 us 820 us
110 us 160 us
Cannot switch Cannot switch
Cannot switch 160 us
20 us
Immediately
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TX