Mac Serial Interface - Epson Stylus COLOR 800 Service Manual

1.5.3 Mac Serial Interface

‰Standard
‰Synchronization
‰Bit Rate
‰Word Format
‰Handshaking
‰Adaptable Connector
‰Recommended I/F Cable
Pin No.
1
2
3
4
5
6
7
8
Note: Refer to the figure below for the connector pin arrangement.
Table 1-19. X-ON/X-OFF, DTR
State
Ready
Rev. A
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RS-423 compliant
Synchronous
Approximately 900Kbps/1.8 Mbps
Start bit
Data bits
Parity bit
Stop bit
X-ON/X-OFF, DTR protocol
8-pin mini circular connector
Apple System Peripheral-8 cables
Table 1-18. Connector Pin Assignments for Serial Interface
Signal Name
SCLK
CTS
TxD-
S.G.
RxD-
TxD+
DTR
RxD+
5
Figure 1- 7. Serial I/F Pin Assignments
Buffer space
Busy Less than 1024 bytes
More than 2048 bytes
1 bit
8 bit
No parity bit
1 bit
I/O Functional Description
O Synchronous clock
I Clear to send
O Transmit data -
I Signal ground
I Receive data -
O Balanced transmit +
O Data terminal ready
I Balanced receive +
8 6
7
4 3
1
2
X-ON/X-OFF
Send X-OFF code
Send X-ON code
Product Description
Protocol
DTR
Off
On
1-17