iDP3420/3421/3423 User’sMa nual
36 CITIZEN
10.3.3 ErrorDetection
A parity error, framingerror, and overrun error are detected. When an error is detected,that data is
storedin the buffer as "?".
(1) Framingerror
Thiserror results when a space is detectedin detectingthe stopbit . Thatdata is stored in the buffer
as"?".
(2) Parityerror
If a parity checkhas been specified and an error is detected at the timeof parity check, that data is
storedin the buffer as "?".
(3) Overrunerror
Ifan overrun error is detected, that data is stored in the buffer as "?".
10.3.4 Data Receiving Control
Whenthe DTR signal is a space, the data from the host side can berece ived. When it is a mark, howe ver,
the data cannot be received.
10.3.5 Buffering
The DTR and TXD signa ls are ava ilable as cont rol signals to transfer the data to the input buffer.