Citizen CBM-910 Series - 6.4 Electrical Characteristics

CBM-910 User’s Manual
CITIZEN 21
6.4 Electrical Characteristics
(1) RS-232C I/O Signals (RD / TD / DTR)
∗Input (RD / TD) Mark = (-8V): stop bit
Space = (+8V): start bit
∗Output (DTR) Mark = (-8V): for Busy
Space = (+8V): for Ready
(2) TTL Circuit
Input (RESET)
[HOST] [CBM-910]
Set to low when reset [HC04 or equivalent]