CHAPTER 10 SERIAL INTERFACE FUNCTION
User’s Manual U12688EJ4V0UM00
298
Figure 10-4. Asynchronous Serial Interface Reception Complete Interrupt Timing
Start
Stop
D0
D1
D2
D6
D7
RXDn (input)
INTSRn interrupt
Parity/
expansion
Remark
n = 0, 1
(d) Receive error flag
In synchronization with the receive operation, three types of error flags, the parity error flag, framing error
flag, and overrun error flag, are affected.
A receive error interrupt request is generated by ORing these three error flags.
By reading out the contents of the ASISn register in the receive error interrupt (INTSERn), which error
occurred during reception can be detected.
As for the contents of the ASISn register, either the receive buffer (RXBn or RXBnL) are read or it is reset
(0) by reception of the next data (if there is an error in the next receive data, that error flag is set).
Receiving Error
Cause
Parity error
The parity specification during transmission does not match with
the parity of the receive data.
Framing error
A stop bit was not detected.
Overrun error
Reception of the next data was completed before data was read
from the receive buffer.
Figure 10-5. Receive Error Timing
Start
Stop
D0
D1
D2
D6
D7
RXDn (input)
INTSRn interrupt
Parity/
expansion
INTSTn interrupt
Remark
n = 0, 1
Summary of Contents for V850E/MS1 UPD703100
Page 2: ...User s Manual U12688EJ4V0UM00 2 MEMO ...
Page 6: ...User s Manual U12688EJ4V0UM00 6 MEMO ...
Page 8: ...User s Manual U12688EJ4V0UM00 8 MEMO ...
Page 12: ...User s Manual U12688EJ4V0UM00 12 MEMO ...
Page 26: ...User s Manual U12688EJ4V0UM00 26 MEMO ...
Page 68: ...User s Manual U12688EJ4V0UM00 68 MEMO ...
Page 124: ...User s Manual U12688EJ4V0UM00 124 MEMO ...
Page 198: ...User s Manual U12688EJ4V0UM00 198 MEMO ...
Page 230: ...User s Manual U12688EJ4V0UM00 230 MEMO ...