Mac Serial Interface - Epson SEIJ98006 Service Manual

EPSON Stylus Color 900

1.3.3 Mac Serial Interface

Standard: Based on RS-423


Synchronization: Synchronous


Bit Rate: Approximately 1.8 Mbps


Handshaking: X-ON/X-OFF, DTR Protocol


Word Format: Start Bit = 1 bit
Data Bit = 8 bit
Parity Bit = No parity bit
Stop Bit = 1 bit


Adaptable Connector: 8-pin mini circular connector


Recommended Cable:Apple System Peripheral-8 Cable


Connector pin assignment and signal:See Table 1-14.
Table 1-14. 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
Product Description
Description
Synchronous clock signal
Clear To Send
Transmit Data (-)
(Signal Ground)
Receive Data (-)
Balanced Transmit Data (+)
Data Terminal Ready
Balanced Receive Data (+)


X-ON/X-OFF, DTR protocol:See Table 1-15.
Table 1-15. X-On/X-Off and DTR Protocol
State Buffer Space
Busy Less than 3072 bytes
Ready More than 5120 bytes
Interface
Revision C
X-ON/X-OFF DTR
Send X-OFF code OFF
Send X-ON code ON
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