M30280F6HP RENESAS [Renesas Technology Corp], M30280F6HP Datasheet - Page 97
M30280F6HP
Manufacturer Part Number
M30280F6HP
Description
16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/Tiny SERIES
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.M30280F6HP.pdf
(423 pages)
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M
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1
. v
Table 9.5 IPL Level That is Set to IPL When A Software or Special Interrupt Is Accepted
J
6
Figure 9.6 Interrupt response time
0
9.4.1 Interrupt Response Time
9.4.2 Variation of IPL when Interrupt Request is Accepted
C
2
9
2 /
Figure 9.6 shows the interrupt response time. The interrupt response or interrupt acknowledge time
denotes the time from when an interrupt request is generated till when the first instruction in the interrupt
routine is executed. Specifically, it consists of the time from when an interrupt request is generated till
when the instruction then executing is completed ((a) in Figure 9.6) and the time during which the inter-
rupt sequence is executed ((b) in Figure 9.6).
When a maskable interrupt request is accepted, the interrupt priority level of the accepted interrupt is set
in the IPL.
When a software interrupt or special interrupt request is accepted, one of the interrupt priority levels listed
in Table 9.5 is set in the IPL. Shown in Table 9.5 are the IPL values of software and special interrupts
when they are accepted.
Watchdog timer, NMI, Oscillation stop and re-oscillation detection,
low voltage detection
Software, address match, DBC, single-step
0 .
B
0
0
8
0
G
4
J
7
a
o r
0 -
. n
u
2
3
p
Interrupt request generated
0
, 1
(a) The time from when an interrupt request is generated till when the instruction then
(b) The time during which the interrupt sequence is executed. For details, see the table
0
(
M
2
executing is completed. The length of this time varies with the instruction being
executed. The DIVX instruction requires the longest time, which is equal to 30 cycles
(without wait state, the divisor being a register).
below. Note, however, that the values in this table must be increased 2 cycles for the
DBC interrupt and 1 cycle for the address match and single-step interrupts.
0
1
Interrupt sources
0
6
7
C
Interrupt vector address
_______
2 /
, 8
page 77
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Instruction
1
6
Even
Even
Odd
Odd
_________
C
(a)
2 /
f o
Interrupt response time
8
3
) B
8
5
Interrupt request acknowledged
Interrupt sequence
SP value
Even
Even
Odd
Odd
(b)
Without wait
18 cycles
19 cycles
19 cycles
20 cycles
interrupt routine
Instruction in
Level that is set to IPL
Time
Not changed
7
9. Interrupts
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