HD404654 Datasheet, PDF (20/111 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

HD404654 Series
$ 000,0
IE
INT₀ interrupt
$ 000,2
IFO
$ 000,3
IMO
INT₁ interrupt
$ 001,0
IF1
$ 001,1
IM1
$ 001,2
Timer A interrupt IFTA
$ 001,3
IMTA
Sequence control
• Push PC/CA/ST
• Reset IE
• Jump to vector
address
Priority control logic
Vector
address
Not used
$ 002,2
Timer C interrupt IFTC
$ 002,3
IMTC
$ 003,0
Timer D interrupt IFTD
Serial interrupt
$ 003,1
IMTD
$ 003,2
IFS1
$ 003,3
IMS1
Note: $m,n is RAM address $m, bit number n.
Figure 8 Interrupt Control Circuit
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