Host Computer System.pdf - 第9页
AVK3 HOST COMPUTER SYSTEM 1. HOST C OMPU TER SYS TEM INTER F ACE SPEC IFICATIONS D77HEC-51- 000-A0 1-2 D77HEC - 51-000-A 0 1. HO ST COMP UT ER S YST EM INT ERF A CE SP ECIFIC A TIONS
AVK3
HOST COMPUTER SYSTEM
1. HOST COMPUTER SYSTEM INTERFACE SPECIFICATIONS
D77HEC-51-000-A0
1-1
1. HOST COMPUTER SYSTEM
INTERFACE SPECIFICATIONS
AVK3
HOST COMPUTER SYSTEM
1. HOST COMPUTER SYSTEM INTERFACE SPECIFICATIONS
D77HEC-51-000-A0
1-2
D77HEC-51-000-A0
1. HOST COMPUTER SYSTEM
INTERFACE SPECIFICATIONS
AVK3
HOST COMPUTER SYSTEM
1.1 RS-232C
D77HEC-51-010-A1
1.1-1
1.1. RS-232C
D77HEC-51-010-A1
1.1.1 Introduction
This manual is used when the machine is operated by a host computer and it is mainly focused on the
connecting interface. It has no relationship to the performance of the machine. Rather, it is concerned with
connection of RS-232C interface. If controlling the machine in groups, determine specification after
thoroughly reading this manual.
This manual is written for use with AVK3 (Panadac-783K).
=REMARKS=
Be aware that contents of this manual are subject to change without prior notice.
1.1.2 Standard Interface Specifications
Interface EIA standard RS-232C
Number of channels 1 channel <DTE specifications, 25-pin connector (socket) output>
Synchronizing type Asynchronous mode/Start-stop synchronous type
Communication system Duplex/(half duplex) However, protocol is handshaking system.
Transfer speed 2,400 / 4,800 / 9,600 / 19,200 bps
Start Data Parity Stop Total
Bit pattern
1 7 1 1 10
Error control system Vertical parity check <even parity>
Bit transfer order Low position first <from LSB>
1.1.3 RS-232C Interface (Hardware)
This chapter deals with the RS-232C interface circuit used in the AVK3 system.
Voltage connection is standard for the RS-232C.
186
main
CPU
Z80B
main
CPU
Z80B
main
CPU
Data line
Write control
Read control
Inter-
rupt
Oscillation circuit
Control unit
Frame ground
Transmitted data
Received data
Signal ground
Terminal ready
Data set ready
Request to send
Clear to send
=REMARKS=
Signals marked are used as a pair.