Appendix C Interfaces - Epson TM-300A Operator's Manual

APPENDIX C Interfaces

n
TM-300A/B
1. Specifications (RS-232C compatible)
Data transmission: Serial
Synchronization: Asynchronous
Handshaking:
Signal level:
Baud rates:
Bit length:
Parity:
Stop bits:
Connector:
2. Interface connector terminal assignments and signal functions
Pin Number Signal Name
FG (GND)
1
2
SD (TXD)
3 RD (RXD)
4
RS (RTS)
5 DR (DSR)
7
SG (GND)
DTR/DSR or XON/XOFF control
MARK = -3 to -15 V:
SPACE = +3 to + 15 V:
1200, 2400, 4800, 9600 bps
7 or 8 bits
None, even, odd
or more (data transmitted from
1
stop bit.)
D-SUB 25 (female) or equivalent
Signal Direction
-
Frame ground
output Transmit data
Input Receive data
output The same signal as DTR
This signal indicates whether the host
Input
computer can or cannot receive data.
"SPACE" indicates that the host com-
puter can receive data and MARK
indicates that the host computer cannot
receive data.
When DTF/DSR control is selected, the
printer transmits data after checking this
signal.
When XON/XOFF control is selected, the
printer does not check this signal.
-
Signal ground
56
Logic "1"
Logic "0"
printer has 1
the
Function