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Stvlus
Color
Service
Manual
Product Description
1.3.2 Parallel Interface Specifications
Data format:
RS-422
serial
Synchronization:
Asynchronous
Handshaking:
By
DTR
signal and X-ON/X-OFF protocol
Table 1-10.
DTR
and
X-OIVX-OFF
Protocol
State
Buffer Space
DTR
X-OWX-OFF
Busy
Less than 512 bytes
off
X-OFF
Ready
More than 1,024 bytes
On
X-ON
Word length
Start bit:
1 bit
Data bit: 8 bit
Parity bit:
none
Stop bit:
1 bit
Bit rate:
57.6K bps
Adaptable connector:
8-pin mini-circular connector
Recommended I/F cable:
Apple@
System Peripheral-8 cable
Table 1-11. Signal and Connector Pin Assignments for Serial Interface
Pin No.
Signal Name
I/o’
Description
1
DTR
out
Data terminal ready
2 NC
No connection
3
TXD
out
Transmit data
4 SG
In
Signal ground
5
RXD
In
Receive data
6
TXD
out
Balanced transmit
7
NC
No connection
8
RXD
In
Balanced receive
* The
1/0
column
indicates the data flow as viewed from the
printer.
Rev. A
1-11