6-7
6.2.2 Specification of interface
(1) Serial
interface
Method
Asynchronous serial interface
RS-232C
Connector
DSUB 25-pin
Protocol control
XON/XOFF and CTS/DTR
Receive buffer
size
32K bytes
Receiving data stops when the remaining buffer reaches 2K
bytes and resumes when the remaining buffer reaches 4K bytes
Baud rate
300, 600, 1200, 2400, 4800, 9600, 19200, 38400 bps
Bit length
7- or 8-bit
Stop bit
Fixed
When printer receives data, stop bit is fixed at 1, and when
printer transmits data, stop bit is fixed at 2. But computer can
transmit and receive data, regardless of stop bit at 1 or 2
Parity
No
(2) Parallel
interface
Method
8-bit parallel
Connector
36-pin unphenol type
Synchronous
system
Strobe pulse
Handshaking
ACKNLG and BUSY signals
Signal level
TTL
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