Interface
12-3
In RS-232, the least significant bit (LSB) is sent first, and the MSB is sent last. For characters
00 hex – 7F hex, the first seven bits are the same for 8-bit as for 7-bit communications.
Transmitted Parity
If the computer expects busy-by-code handshaking (XON/XOFF or ETX/ACK), the transmitted
parity at the printer must match the host. Even with the printer set to IGNORE RECEIVED
PARITY, the printer’s transmitted parity must be set to match the host if using busy-by-code,
otherwise the host may not recognize the handshake and the printer’s buffer will overflow.
Serial Data Cable
The serial interface connector is a 25-pin female connector located on the back of the printer.
The serial interface data cable requires the following or equivalent parts to mate with the
female connector on the printer.
Cannon 25-pin plug DBM-25P
Cannon shell DB115339-22
Screws #4 – 40 x 1/8 (2 required)
STOP
BIT(S)
PARITY
BIT
LEAST
SIGNIFICANT
BIT
START
BIT
UPPERCASE “E”
ONE BIT TIME
