User’s Manual U11969EJ3V0UM00
219
CHAPTER 8 SERIAL INTERFACE FUNCTION
Figure 8-4. Asynchronous Serial Interface Reception Completion Interrupt Timing
(d) Reception error flag
Three error flags, parity error, framing error, and overrun error flags, are related with the reception
operation.
The receive error interrupt request occurs as a result of ORing these three error flags.
By reading the contents of the ASIS registers, the error which caused the receive error interrupt (INTSER)
can be identified.
The contents of the ASIS registers are reset to 0 when the receive buffer (RXB or RXBL) is read or the
next data frame is received (if the next data contains an error, the corresponding error flag is set).
Receive
Error Cause
Parity error
Parity specified during transmission does not coincide with parity of receive data
Framing error
Stop bit is not detected
Overrun error
Next data is completely received before data is read from receive buffer
Figure 8-5. Receive Error Timing
RXD (input)
INTSR interrupt
Start
D0
D1
D2
D6
D7
Parity/
extend
Stop
RXD (input)
INTSR interrupt
Start
D0
D1
D2
D6
D7
Stop
INTSER interrupt
Parity/
extend
Содержание V854 UPD703006
Страница 2: ...2 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 22: ...22 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 80: ...80 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 134: ...134 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 156: ...156 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 294: ...294 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 320: ...320 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 324: ...324 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 336: ...336 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 376: ...376 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 382: ...382 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 394: ...394 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 396: ...396 User s Manual U11969EJ3V0UM00 MEMO ...