TMP92CZ26A

92CZ26A-68

Figure 3.5.1 Interrupt processing Sequence
Interrupt processing
Interrupt vector calue “V”
read interrupt request F/F clear
Interrupt specified
by DMA
start vector ?
PUSH PC
PUSH SR
SR<IFF2:0> Level of
accepted
interrupt + 1
INTNEST INTNEST + 1
PC (FFFF00H + V)
Interrupt processing
program
RETI instruction
POP SR
POP PC
INTNEST INTNEST 1
End
Clear interrupt request flag
YES
NO
Data transfer by micro
DMA
COUNT COUNT 1
COUNT = 0
NO
Clear vector register
generating micro DMA
transfer end interrupt
(INTTC0)
YES
Micro DMA
processing
General-purpose
interrupt
processing
DMA soft start
request
Start specified
by HDMA YES to HDMA processing flow
NO