Brother HL-2600CN Series, Service Manual

Page: 98 / 385

IV-47
The COMMAND signal and STATUS signal are the signals that are used to
transfer the data between the controller and the engine, which perform as a
half-duplex asynchronous serial communication. Refer to Fig.4-40.
8ms (TYP)
30ms (MAX)
P
P
LSB
MSB
LSB
MSB
Fig.4-39
Note:
x
Based on “Asynchronous Communication” method.
x
Command/Status communication must keep the “Handshake Rule”.
x
Baud rate is 9600 bps.
x
Frame format: - one (1) start bit,
- eight (8) data bits
(Start bit side is LSB, Parity bit is MSB),
- one (1) odd parity bit,
- one (1) stop bit.
x
The video controller has to send an “Initialize Command” to the engine controller
after power on in order to establish communication.
The power for the Main PCB is supplied through the engine interface
connector.
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