5.6DATA Construction
5.6.1 Serial Data format
1.Start BIT
2.DATA BIT (+ Parity BIT)
3.Stop BIT (1 ~ 2 BIT)
(1)START BIT
At 1 / 2 BIT after (a), signal level is checked out, (b). When signal level is MARK, continuous search for START BIT is made for the next bit.
(2)DATA BIT + PARITY BIT
DATA BIT and PARITY BIT are checked out every 1 / 2 BIT from the half point of START BIT, (b). Signal level of these points (MARK = 1, SPACE = 0) are read as input DATA.
The sequence of these BIT is BIT 0, BIT 1 ~ PARITY BIT from START BIT.
(3)STOP BIT
STOP BIT is 1 or 2 BIT and its signal level is MARK. If SPACE LEVEL is read at STOP BIT, FRAMING ERROR occurs.
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