HD6432646 Hitachi, HD6432646 Datasheet - Page 156
HD6432646
Manufacturer Part Number
HD6432646
Description
(HD64F264x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432646.pdf
(1155 pages)
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5.4.5
The H8S/2646 Series is capable of fast word transfer instruction to on-chip memory, and the
program area is provided in on-chip ROM and the stack area in on-chip RAM, enabling high-
speed processing.
Table 5-9 shows interrupt response times - the interval between generation of an interrupt request
and execution of the first instruction in the interrupt handling routine. The execution status
symbols used in table 5-9 are explained in table 5-10.
Table 5-9
No.
1
2
3
4
5
6
Total (using on-chip memory)
Notes: *1 Two states in case of internal interrupt.
122
Execution Status
Interrupt priority determination
Number of wait states until executing
instruction ends
PC, CCR, EXR stack save
Vector fetch
Instruction fetch
Internal processing
*2 Refers to MULXS and DIVXS instructions.
*3 Prefetch after interrupt acceptance and interrupt handling routine prefetch.
*4 Internal processing after interrupt acceptance and internal processing after vector fetch.
*5 Not available in the H8S/2646 Series.
Interrupt Response Times
Interrupt Response Times
*2
*3
*4
*1
INTM1 = 0
3
1 to
(19+2·S
2·S
S
2·S
2
11 to 31
I
K
I
Normal Mode
I
)
INTM1 = 1
3
1 to
(19+2·S
3·S
S
2·S
2
12 to 32
I
K
I
*5
I
)
INTM1 = 0
3
1 to
(19+2·S
2·S
2·S
2·S
2
12 to 32
K
I
I
Advanced Mode
I
)
INTM1 = 1
3
1 to
(19+2·S
3·S
2·S
2·S
2
13 to 33
K
I
I
I
)
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