HD404618 Datasheet, PDF (20/91 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

HD404618 Series
$ 000,0
IE
$ 000,2
IF0
$ 000,3
IM0
$ 001,0
IF1
$ 001,1
IM1
$ 001,2
IFTA
$ 001,3
IMTA
$ 002,0
IFTB
Sequence control
• Push PC/CA/ST
• Reset IE
• Jump to vector
address
Priority control logic
Vector
address
$ 002,1
IMTB
$ 002,2
IFTC
$ 002,3
IMTC
$ 003,0
IFS
$ 003,1
IMS
Note: $m, n is at RAM address $m, bit number n.
Figure 7 Block Diagram of Interrupt Control Circuit
Table 2 Vector Addresses and Interrupt Priorities
Reset/Interrupt
RESET
INT₀
INT₁
Timer A
Timer B
Timer C
Serial
Priority
1
2
3
4
5
6
Vector Address
$0000
$0002
$0004
$0006
$0008
$000A
$000C
18