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18.5.4 Interrupt Function
The expanded I/O serial interface generates the interrupt requests for the CPU.
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Interrupt function of expanded I/O serial interface
An interrupt request is output to the CPU when the SIR bit, which acts as an interrupt flag, is set
at the end of data transfer provided that the SIE bit of the SMCS, which enables interrupts, is
"1".
Figure 18.5-9 shows the timing for output of interrupt signals.
SCK1,SCK2
BUSY
SIR
SDR RD/WR
SOT1,SOT2
Figure 18.5-9 Timing for interrupt signal output
(Transfer end)
SIE=1
DO6
CHAPTER 18 EXPANDED I/O SERIAL INTERFACE
* For MODE = 1
DO7 (Data hold)
403
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