m30833fjgp Renesas Electronics Corporation., m30833fjgp Datasheet - Page 123

• Manufacturer Part Number: m30833fjgp
• Description: Renesas 16/32-bit Single-chip Microcomputer M16c Family / M32c/80 Series
• Manufacturer: Renesas Electronics Corporation.

R
R
M
e
E
3
. v
J
Figure 10.6 Interrupt Response Time
2
0
10.6.4 Interrupt Response Time
1
9
C
3 .
B
Figure 10.6 shows an interrupt response time. Interrupt response time is the period between an interrupt
generation and the execution of the first instruction in an interrupt service routine. An interrupt response
time includes the period between an interrupt request generation and the completed execution of an in-
struction ((a) in Figure 10.6) and the period required to perform an interrupt sequence ((b) in Figure 10.6).
8 /
Time (a) varies depending on the instruction being executed. The DIV instruction requires the longest
time (a); 40 cycles when an immediate value or register is set as the divisor .
When the divisor is a value in the memory, the following value is added.
X is the number of wait states for a divisor space. Y is the number of wait states for the space that stores
indirect addresses. If X and Y are in an odd address or in 8-bit bus space, the X and Y value must be
doubled.
Table 10.4 lists time (b).
0
1
3
0
3
J
G
4
a
Interrupt request is generated
0 -
n
o r
(a) Period between an interrupt request generation and the completed execution of an instruction.
(b) Period required to perform an interrupt sequence.
3 .
1
u
, 1
3
p
1
2
(
M
0
0
• Normal addressing
• Index addressing
• Indirect addressing
• Indirect index addressing
3
6
2
C
8 /
Page 100
, 3
M
3
2
C
Instruction
f o
8 /
4
3
8
Interrupt response time
) T
8
(a)
Interrupt request is acknowledged
Interrupt sequence
: 2 + X
: 3 + X
: 5 + X + 2Y
: 6 + X + 2Y
(b)
Instruction in an
interrupt routine
Time
10. Interrupts