Opticon MDI-4100 - Recover from Low Power Mode by Command (UART); Figure 26: Recovery Example Using Commands

MDI-4000 Series Serial Interface Manual
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5.4.2 Recover from Low Power Mode by Command (UART)
You can use a command to recover from low power mode.
Recover from Low Power Mode by Command
1. To start the recovery process, send dummy data, such as a NULL character.
2. Wait until the RTS or POWERDWN signal becomes low. (This should happen within
30 ms.)
3. To start reading, send the trigger command “Z”.
4. If you need to send additional commands, confirm that the RTS or POWERDOWN signal
is low.
*1
Cannot be used when Handshaking is set to MODEM, because the RTS signal is “High.”
*2
The MDI-4x00 and MDI-4x50 have different in recovery times: MDI-4x00 = 18 ms, MDI-4x50 = 41 ms.
Figure 26: Recovery Example Using Commands
Read
Standby
Low Power
I
OP
10 ms -
I
LOW
* Confitured
Low Power
I
STD
I
LOW
Recovery
*2
Recovery command “Null” etc
Trigger command “Z” etc
State
High
Low
Command acceptable
Wave form
RxD
RTS (*1)
or
POWERDWN