Interrupt Function Of The Extended Serial I/O Interface - Fujitsu MB90390 Series Hardware Manual

22.4.4

Interrupt Function of the Extended Serial I/O Interface

This block can issue an interrupt request to the CPU. At the end of data transfer, the SIR
bit is set as an interrupt flag. When "1" is written to the interrupt enable bit (SIE bit) of
SMCS, an interrupt request is issued to the CPU.
■ Interrupt Function of the Extended Serial I/O Interface
Figure 22.4-8 Interrupt Signal Output Timing of the Extended Serial I/O Interface
SCK4
BUSY
SIR
SDR RD/WR
SOT4
SCK4
BUSY
SIR
SDR RD/WR
SOT4
DO6
SIE=1
DO6 DO7 (Data is maintained.)
SIE=1
DO7 (Data is maintained.)
(Transfer end)
When MODE=1
(Transfer end)
When MODE=0
CHAPTER 22 SERIAL I/O
(Transfer start)
DO0
453