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MZS500
6. R232C INTERFACE
6-1. General specification
Input/output format
No of channels
Code used
Baud rate
Transmission system
Synchronization method
Communication control
procedure
Data format
LSI used
RS-232C bit serial input/output
1 channel
JIS 7-channel/JIS 8 channel
110 to 9600 bits/sec
Half-duplex
Start-stop
Non-procedure
Stop bif 1/1.5/2, with or without
even or odd parity.
8251 AC or8253C-5
(Programmable interval Timer)
6-2. Data transmission format
2°
2
1
2
2
2
3
2
4
2
5
2
6
7-bit,
with parity
v
„ _ i \
j
v__^___/
Start bit
Data bit (7 bits)
Parity bit Stop bit (1 or 2 bits)
7-bit,
without parity
V
XV
X
V
X
'
Start bit
Data bit (7 bits)
Stop bit
8-bit
with parity
V
•
w
•
' V
^
^
_
Start bit
Data bit (8 bits)
Parity bit
Stop bit (1 or 2 bits)
8-bit,
without parity
v
,
Tr
y
Y
Start bit
Data bit (8 bits)
Stop bit (1 or 2 bit
Example: 7-bits, even parity, 1 stop bit
Start bit
Stop bit of preceding data
7-bit data (26H)
Parity bit
Start bit of
succeeding data
Stop bit
- 7) -
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