CMOSTEK CMT2168A - Page 11

AN279
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2. Automatic control interface
Connect the burner automatic control interface with the automatic machine through wire, and the automatic
machine sends out the start signal to trigger the burning, and detect the OK, BUSY, FAIL status signal sent by
the burner to control the operation of the machine, and then carry out automatic batch burning. The
connection mode of the burner automatic control interface and the automatic machine is shown in the figure
and table below:
Figure 7. Automatic control interface
（Comm interface）
Table 9. Description of the automatic control interface
Pin No. Pin name IO Description
Connect to host
machine
1 FAIL O
Indicates output is failed and low level
is valid.
Fail
2 GND GND Ground GND
3 BUSY O
Indicates that the burner is busy and
low level is effective.
Busy
4 - - - -
5 OK O
Indicates burning successfully and low
level effective.
Ok
6 - - - -
7 START I
Burning trigger signal, low level
effective. Low level duration should be
greater than 30 ms and less than 50
ms
Start
8 - - - -
9 3.3 V O 3.3 V power supply output -
10 - - - -
START
OK
FAIL
200ms
400ms
400ms
Waiting time
Figure 8. Burning automatic control sequence diagram