CBM America CBM-262 - Manual (Page 42)

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Serial Interface
Explanation of Signal Names
F. GND (Frame Ground)
Connected to the printer case.
TXD (Transmit Data (Send Data))
Transmission line for sending serial data from the printer to the Host.
RXD (Receive Data)
Transmission line for the printer to receive serial data from the Host.
DSR (Data Set Ready)
Signal line which indicates to the printer that the Host is ready to receive.
A low level reset can be carried out through the menu setting.
S. GND (Signal Ground)
The GND (earth) for the signal line.
DTR (Data Terminal Ready)
Signal line which indicates to the Host that the printer is ready to receive.
RTS (Request To Send)
Pulled up to +10V at 3.3k ohms.
INIT
This is the signal line used by the host to send a reset command to the printer. (However,
this is when enabling of the INIT signal by the menu setting has been selected.)
Input/Output Circuits
Input Circuit
Output Circuit
RXD
DSR
TXD
DTR
Signal Name Configuration
Signal Name Configuration
Compatible with µPD4721.
Compatible with µPD4721.