CMOSTEK CMT2300A - Low Battery Detection Specifications; Digital Interface Specifications

AN146
Rev 0.9 | Page 10/25
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1.3.1 Automatically Exit from TX
The simplest mode is that after TX, according to the different TX_EXIT_STATE, automatically switches to
the corresponding status, and the rest of the situation is switched by MCU manual controlling.
Table 9. Automatically Exit from TX
Control Bit
Value
SLEEP_TIMER_EN
0
TX_DC_EN
0
TX_EXIT_STATE
0/1/2
Figure 7. Transmitter Automatically Exits from TX
1.3.2 Automatically Wake from SLEEP, Automatically Exit from TX
In this mode, besides the automatically exiting from TX, also open the SLEEP TIMER. After automatically
waking, the chip will switch to STBY and wait for the MCU operation.
Table 10. Automatically Wake from SLEEP, Automatically Exit from TX
Control Bit
Value
SLEEP_TIMER_EN
1
TX_DC_EN
0
TX_EXIT_STATE
0/1/2
SLEEP_TIMER_EN = 1
SLEEP STBY TFS TX
TX_EXIT_STATE = 0
TX_EXIT_STATE = 1
TX_EXIT_STATE = 2
Figure8. Transmitter Automatically Wakes from SLEEP, Automatically Exits from TX