Mac Serial Interface - Epson Stylus COLOR 900 Service Manual

EPSON Stylus COLOR 900/900N

1.3.3 Mac Serial Interface

Y
Standard: Based on RS-423
Y
Synchronization: Synchronous
Y
Bit Rate: Approximately 1.8 Mbps
Y
Handshaking: X-ON/X-OFF, DTR Protocol
Y
Word Format: Start Bit = 1 bit
Data Bit = 8 bit
Parity Bit = No parity bit
Stop Bit = 1 bit
Y
Adaptable Connector: 8-pin mini circular connector
Y
Recommended Cable: Apple System Peripheral-8 Cable
Y
Connector pin assignment and signal: See Table 1-15.
Table 1-15. Pin Assignment
Signal
Pin No. I/O
Name
1 SCLK O
2 CTS I
3 TXD- O
4 SG I
5 RXD- I
6 TXD+ O
7 DTR O
8 RXD+ I
Description
Synchronous clock signal
Clear To Send
Transmit Data (-)
(Signal Ground)
Receive Data (-)
Balanced Transmit Data (+)
Data Terminal Ready
Balanced Receive Data (+)
Y
X-ON/X-OFF, DTR protocol: See Table 1-16.
Table 1-16. X-On/X-Off and DTR Protocol
State Buffer Space
Busy Less than 3072 bytes
Ready More than 5120 bytes
Chapter 1 Product Description
X-ON/X-OFF DTR
Send X-OFF code OFF
Send X-ON code ON
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