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6.
Serial Interface - SPC-8K (Option)
When using the serial interface, the optional Serial-Parallel Converter must be connected to the printer.
6-1. General Specifications
Item
Specifications
Interface
RS-232C level
Synchronization System
Asynchronous
Baud rate
150 - 19,200 bits per second (BPS) [selectable]
150, 300, 600, 1200, 2400, 4800, 9600, 19200 BPS
Word length
Start bit:
1 bit
Data bit:
7 or 8 bits (selectable)
Parity bit:
Odd, Even or None (selectable)
Stop bit:
More than 1 bit length
Signal polarity
Mark:
Logic
″
1
″
(–3V to –15V)
Space:
Logic
″
0
″
(+3V to +15V)
Handshaking
DTR
X
ON
/X
OFF
ETX/ACK
Data buffer
8KB (standard)
6-2. Connector Signal and Functional Descriptions
Pin No.
Signal name
Direction
Function
1
GND
—
2
TXD
OUT
3
RXD
IN
4
RTS
OUT
5
CTS
—
6
NC
7
GND
—
8~10
NC
11
RCH
OUT
12~19
NC
20
DTR
OUT
21~25
NC
Printer chassis ground.
This pin carries data from the printer.
This pin carries data to the printer.
Always space.
This signal is space when the computer is ready to send data.
The printer does not check this pin.
Unused.
Signal ground.
Unused.
The printer sets this signal to space when it is ready to receive data.
This line carries the same signal as pin 20.
Unused.
The printer sets this signal to space when it is ready to receive data.
Unused.
Содержание LC-8521
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Страница 101: ... 97 Blank Page ...
Страница 102: ... 98 4 Wiring Scheme of Printer ...
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Страница 104: ... 100 5 Electrical Parts 5 1 Main Logic Board 5 1 1 Circuit Diagram ...
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Страница 108: ... 104 5 1 2 Component Layout ...
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Страница 116: ... 112 5 4 Power Supply Unit 5 4 1 Circuit Diagram ...
Страница 117: ... 113 5 4 2 Component Layout ...
Страница 120: ... 116 6 Serial Parallel Converter Board Option 6 1 Wiring Scheme ...
Страница 122: ... 118 6 3 CPU Board 6 3 1 Circuit diagram ...