
Rev. A Features and General Specifications 1-13
TM-T88 Series Technical Manual
RS-232 serial interface
Specifications
Data transmission: Serial
Synchronization: Asynchronous
Handshaking: DTR/DSR or XON/XOFF control
Signal levels: MARK = –3 to –15 V: Logic "1"/OFF
SPACE = +3 to +15 V: Logic "0"/ON
Baud rate: 2400, 4800, 9600, 19200 bps
Data word length: 7 or 8 bits
Parity: None, even, odd
Stop bits: 1 or more
Connector (printer side): Female DSUB-25 pin connector
Notes:
The handshaking, data word length, baud rate, and parity depend on the DIP switch settings.
Data transmitted from the printer has 1 stop bit (fixed).
Switching between on-line and off-line
The printer does not have an on-line/off-line switch. The
printer goes off-line:
❏ Between when the power is turned on (including
reset using the interface) and when the printer is
ready to receive data
❏ During the self-test
❏ When the cover is open
❏ During paper feeding using the paper feed switch
❏ When the printer stops printing due to a paper-end
(in cases when an empty paper supply is detected by
either paper roll end detector or the paper roll near-
end detector with a printing halt feature using
ESC c 4)
❏ During macro executing standby status.
❏ When a temporary abnormality ocurrs in the power
supply voltage.
❏ When an error has occurred
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