Serial Interface (Rs-232C) - Star Micronics NP-215 Specifications

7) Timing chart
POWER
DATA
/STB
BUSY
/ACK
T1 = 3500msec (Max)
T2, T3 = 500nsec (Min)
8) Receive control
When BUSY signal stays at LOW, it is feasible to receive data from host computer.
But not feasible when BUSY signal stays at HIGH.

3.2 Serial interface (RS-232C)

1) Synchronization
2) Transmission speed: 4800, 9600, 19200, 38400bps (user selectable)
3) A word consists of
Start bit
Data bit : 7 or 8 bit (user selectable)
Parity bit
Stop bit
4) Signal polarity
RS-232C
Mark
Space
5) Receive data (RD signal)
RS-232C
Mark
Space
6) Reception control (DTR signal)
RS-232C
Mark
Space
7) Transmission control (TD signal)
DC1, [11]h
DC3, [13]h
T2 T3
T1 T4
T4 = 500nsec (Max)
T5, T6 = 4microsec(TYP)
: Asynchronous
: 1bit
: odd, even or no parity (user selectable)
: more than 1 bit
= Logic "1" (-3V -- -12V)
= Logic "0" (+3V -- +12V)
= 1
= 0
= 1
= 0
XON:
XOFF:
T5 T6
Enable data receiving
Disable data receiving
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