CHAPTER 19 IEBus CONTROLLER (V850/SB2)
User’s Manual U13850EJ4V0UM
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(1) Interrupt (INTIE1) occurrence
If NACK is transmitted in the data field, an interrupt (INTIE1) is not issued to the CPU, and the same data is
retransmitted from the master.
If the receive data is not read in time until the next data is received, NACK is automatically transmitted.
(2) Frame end processing
The vector interrupt processing in <2> judges whether the data has been correctly received within one frame.