Mac Serial Interface; Serial Interface Specifications - Epson Stylus COLOR 1520 Service Manual

EPSON Stylus COLOR 1520

1.3.2 Mac Serial Interface

1.3.2.1 Serial Interface Specifications

‰Standard
‰Synchronization
‰Bit rate
‰Word format
‰Handshaking
‰Adaptable connector
‰Recommended I/F cable
Table 0-19. Connector Pin Assignment for Serial Interface
Pin No. Signal Name
1
2
3
4
5
6
7
8
State
Busy
Ready
18
:RS-423 compliance
:Synchronous
:Approximately 900 Kbps, 1.8 Mbps
:Start bit 1 bit
:Data bit 8 bit
:Parity bit No parity bit
:Stop bit 1 bit
:X-ON/XOFF, DTR protocol
:8-pin mini circular connector
:Apple System Peripheral-8 cable
I/O
SCLK O
CTS I
TxD- O
S.G. I
RxD- I
TxD+ O
DTR O
RxD+ I
Figure 0-9.
Serial Interface Connector Pin Assignment
Table 0-20. X-ON/X-OFF, DTR Protocol
Buffer space
Less than 1024 bytes
More than 2048 bytes
Function Description
Synchronous clock
Clear to send
Transmit data -
Signal Ground
Receive data -
Balanced Transmit +
Data terminal ready
Balanced Receive +
X-ON/X-OFF
Send X-OFF code
Send X-ON code
DTR
Off
On
Rev. A