r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 184
r5f21368sdfp
Manufacturer Part Number
r5f21368sdfp
Description
Renesas Mcu R8c Family / R8c/3xt-a Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R5F21368SDFP.pdf
(760 pages)
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Part Number:
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Under development
R8C/36T-A Group
R01UH0240EJ0001 Rev.0.01
Apr 28, 2011
11.9
11.9.1
11.9.2
11.9.3
Do not read address 00000h by a program. When an external interrupt request is acknowledged, the CPU reads
interrupt information (interrupt number and interrupt request level) from address 00000h in the interrupt
sequence. At this time, the corresponding IR bit in the interrupt control register for the acknowledged interrupt
is set to 0.
If a program is used to read address 00000h, the corresponding IR bit for the interrupt which has the highest
priority among the enabled interrupts is set to 0. This may cause the interrupt to be canceled, or an unexpected
interrupt to be generated.
Set a value in the SP before any interrupt is acknowledged. The SP is 0000h after a reset. If an interrupt is
acknowledged before setting a value in the SP, the program may run out of control.
Signal input to pins INT0 to INT4 and pins KI0 to KI3 must meet either the low-level width or the high-level
width requirements shown in External Interrupt INT0 to INT4 Input in the Electrical Characteristics, regardless
of the CPU operating clock.
Notes on Interrupts
Reading Address 00000h
SP Setting
External Interrupt, Key Input Interrupt
Preliminary document
Specifications in this document are tentative and subject to change.
Page 153 of 725
11. Interrupts
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