Toshiba TLCS-900/H1 Series Manual page 45

read interrupt request F/F clear
General-purpose
interrupt
PUSH
processing
PUSH
SR<IFF2:0> ← Level of
INTNEST ← INTNEST + 1
INTNEST ← INTNEST − 1
Figure 3.4.1 Interrupt and Micro DMA Processing Sequence
Interrupt processing
Interrupt specified
YES
by micro DMA
start vector ?
NO
Interrupt vector calue "V"
PC
SR
accepted
interrupt + 1
PC ← (FFFF00H + V)
Interrupt processing
program
RETI instruction
POP SR
POP PC
End
92CH21-43
Clear interrupt request flag
Data transfer by micro
DMA
COUNT ← COUNT − 1
YES
COUNT = 0
NO
TMP92CH21
Micro DMA soft
start request
Micro DMA
processing
Clear vector register
generating micro DMA
transfer end interrupt
(INTTC0 to 7)
2009-06-19