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HD404458 Datasheet(PDF) 21 Page - Renesas Technology Corp

Part # HD404458
Description  4-bit HMCS400-series microcomputers
PDF  122 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD404458 Datasheet(HTML) 21 Page - Renesas Technology Corp

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HD404459 Series
19
Table 3
Interrupt Processing and Activation Conditions
Interrupt Source
Interrupt
Control Bit
INT
0
INT
1
Timer D
Timer A or
INT
2
Timer B or
INT
3
Timer C or
Serial
Wakeup
IE
11
11
11
1
IF0 ·
IM0
10
00
00
0
IF1 ·
IM1
*
10
00
00
IFTD ·
IMTD
**
10
00
0
IFTA ·
IMTA
+ IF2 ·
IM2
**
*
10
00
IFTB ·
IMTB
+ IF3 ·
IM3
**
**
10
0
IFTC ·
IMTC
+ IFS ·
IMS
**
**
*
10
IFWU ·
IMWU
**
**
**
1
Note:
Bits marked by * can be either 0 or 1. Their values have no effect on operation.
Instruction cycles
12
3
4
5
6
Instruction
execution*
IE reset
Interrupt
acceptance
Execution of JMPL
instruction at vector address
Execution of
instruction at
start address
of interrupt
routine
Vector address
generation
Note: * The stack is accessed and the IE reset after the instruction
is executed, even if it is a two-cycle instruction.
Stacking
Figure 9 Interrupt Processing Sequence



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