NEC 78K0S/KA1+ Preliminary User's Manual page 201

www.DataSheet4U.com
(f) Reception error
www.DataSheet4U.com
CHAPTER 11 SERIAL INTERFACE UART6
Three types of errors may occur during reception: a parity error, framing error, or overrun error. If the error
flag of asynchronous serial interface reception error status register 6 (ASIS6) is set as a result of data
reception, a reception error interrupt request (INTSR6/INTSRE6) is generated.
Which error has occurred during reception can be identified by reading the contents of ASIS6 in the reception
error interrupt servicing (INTSR6/INTSRE6) (see Figure 11-6).
The contents of ASIS6 are reset to 0 when ASIS6 is read.
Reception Error
Parity error The parity specified for transmission does not match the parity of the receive data.
Framing error Stop bit is not detected.
Overrun error Reception of the next data is completed before data is read from receive buffer
register 6 (RXB6).
The error interrupt can be separated into reception completion interrupt (INTSR6) and error interrupt
(INTSRE6) by clearing bit 0 (ISRM6) of asynchronous serial interface operation mode register 6 (ASIM6) to
0.
Figure 11-20. Reception Error Interrupt
1. If ISRM6 is cleared to 0 (reception completion interrupt (INTSR6) and error interrupt (INTSRE6) are
separated)
(a) No error during reception
INTSR6
INTSRE6
2. If ISRM6 is set to 1 (error interrupt is included in INTSR6)
(a) No error during reception
INTSR6
INTSRE6
Table 11-3. Cause of Reception Error
INTSRE6
INTSRE6
Preliminary User's Manual U16898EJ1V0UD
Cause
(b) Error during reception
INTSR6
(b) Error during reception
INTSR6
201