Epson 4003353 - Manual (Page 19)

Service Product Description
1.3.2 Parallel Interface Specifications
Data format: serial
Synchronization: Asynchronous
Handshaking: By signal and X-ON/X-OFF protocol
Table 1-10. and Protocol
State Buffer Space
Busy Less than 512 bytes off X-OFF
Ready More than 1,024 bytes On X-ON
Word length
Start bit: 1 bit
Data bit: 8 bit
Parity bit: none
Stop bit: 1 bit
Bit rate: 57.6K bps
Adaptable connector: 8-pin mini-circular connector
Recommended I/F cable: System Peripheral-8 cable
Table 1-11. Signal and Connector Pin Assignments for Serial Interface
Pin No. Signal Name I/o’ Description
out Data terminal ready
2 NC No connection
3 out Transmit data
4 SG In Signal ground
5 In Receive data
6 out Balanced transmit
7 NC No connection
8 In Balanced receive
* The indicates the data flow as viewed from the
Rev. A
1-11