R232c interface, 1. general specification, 2. data transmission format – Sharp MZ-3500 User Manual
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MZS500
6. R232C INTERFACE
6-1. General specification
Input/output format
RS-232C bit serial inpul/output
No of channels
1 channel
Code used
JIS 7-channe(/JlS 8 channel
Baud rate
110 to 9600 bits/sec
Transmission system
Half-duplex
Synchronization method Start-stop
Communication control
procedure
Non-procedure
Data format
Stop bif 1/1.5/2, with or without
even or odd parity.
LSI used
8251 AC or 8253C-5
(Programmable Interval Timer)
6-2. Data transmission format
g O
g '
2 ^
2 ®
2 ^
2 ^
2 ®
7-bit,
with parity
Start
bs\
Data bit (7 bits)
Parity bit Stop bit (1 or 2 bits)
7-bit,
without parity
Start bit
------Y-------
Data bit (7 bits)
Stop bit
8*bit,
with parity
Start bit
Data bit (8 bits)
Parity bit Stop bit <1 or 2 bits)
8-bit,
without parity
Start bit
Data bit 18 bits)
Stop bit (1 or 2 bits)
Example: 7-bits, even parity, 1 stop bit
2 ° 2 ' 2 ^ 2 ® 2 ' * 2 ® 2 ®
Start bit
Stop bit of preceding data
7-bit data {26H}
Panty bit
Stop bit
Start bit of
succeeding data
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