Citizen Systems iDP3420 User Manual download pdf (Page 52)

iDP3420/3421/3423 User’s Manual

36 CITIZEN

10.3.3 Error Detection

A parity error, framing error, and overrun error are detected. When an error is detected, that data is

stored in the buffer as "?".

(1) Framing error

This error results when a space is detected in detecting the stop bit. That data is stored in the buffer

as "?".

(2) Parity error

If a parity check has been specified and an error is detected at the time of parity check, that data is

stored in the buffer as "?".

(3) Overrun error

If an overrun error is detected, that data is stored in the buffer as "?".

10.3.4 Data Receiving Control

When the DTR signal is a space, the data from the host side can be received. When it is a mark, however,

the data cannot be received.

10.3.5 Buffering

The DTR and TXD signals are available as control signals to transfer the data to the input buffer.

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Citizen Systems iDP3420 User Manual Page 52