APPENDIX C Interfaces
n
TM-300A/B
1. Specifications (RS-232C compatible)
Data transmission: Serial
Synchronization: Asynchronous
Handshaking:
DTR/DSR or XON/XOFF control
Signal level:
MARK = -3 to -15 V:
Logic “1”
SPACE = +3 to + 15 V:
Logic “0”
Baud rates:
1200, 2400, 4800, 9600 bps
Bit length:
7 or 8 bits
Parity:
None, even, odd
Stop bits:
1
or more (data transmitted from
the
printer has 1
stop bit.)
Connector:
D-SUB 25 (female) or equivalent
2. Interface connector terminal assignments and signal functions
Pin Number
Signal Name
1
FG (GND)
-
2
SD (TXD)
output
3
RD (RXD)
Input
4
RS (RTS)
output
5
DR (DSR)
Input
7
SG (GND)
-
Signal Direction
Function
Frame ground
Transmit data
Receive
data
The same signal as DTR
This signal indicates whether the host
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
Summary of Contents for TM-300A
Page 1: ...1 station printer Operator s Manual 400137501 ...
Page 7: ...I SETTING UP ...
Page 29: ...II REFERENCE ...
Page 73: ...APPENDIX G Character Code Tables n Page 0 International character set U S A 67 ...
Page 74: ......