r5f21346mnfp Renesas Electronics Corporation., r5f21346mnfp Datasheet - Page 186

• Manufacturer Part Number: r5f21346mnfp
• Description: Single-chip Mcus Incorporates The R8c Cpu Core
• Manufacturer: Renesas Electronics Corporation.

R8C/34M Group
R01UH0131EJ0100 Rev.1.00
Jun 21, 2011
Figure 11.4
11.3.5
11.3.6
Table 11.5
Watchdog timer, oscillation stop detection, voltage monitor 1/comparator A1,
voltage monitor 2/comparator A2, address break
Software, address match, single-step
Figure 11.4 shows the Interrupt Response Time. The interrupt response time is the period from when an
interrupt request is generated until the first instruction in the interrupt routine is executed. The interrupt
response time includes the period from when an interrupt request is generated until the currently executing
instruction is completed (refer to (a) in Figure 11.4) and the period required for executing the interrupt sequence
(20 cycles, refer to (b) in Figure 11.4).
When a maskable interrupt request is acknowledged, the interrupt priority level of the acknowledged interrupt
is set in the IPL.
When a software interrupt or special interrupt request is acknowledged, the level listed in Table 11.5 is set in
the IPL.
Table 11.5 lists the IPL Value When Software or Special Interrupt is Acknowledged.
Interrupt request generation
Interrupt Response Time
IPL Change when Interrupt Request is Acknowledged
IPL Value When Software or Special Interrupt is Acknowledged
Interrupt Response Time
Interrupt Source without Interrupt Priority Level
(a) The period from when an interrupt request is generated until the currently executing instruction is completed.
(b) 21 cycles for address match and single-step interrupts.
The length of time varies depending on the instruction being executed. The DIVX instruction requires
the longest time, 30 cycles (no wait states if the divisor is a register).
Instruction
(a)
Interrupt response time
Interrupt request acknowledgement
Interrupt sequence
20 cycles (b)
interrupt routine
Instruction in
Time
Value Set in IPL
Not changed
7
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11. Interrupts