R5F21236KFP#U0 Renesas Electronics America, R5F21236KFP#U0 Datasheet - Page 127

• Manufacturer Part Number: R5F21236KFP#U0
• Description: IC R8C/23 MCU FLASH 48LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/23r

Specifications of R5F21236KFP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: CAN, I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, Voltage Detect, WDT
• Number Of I /o: 41
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 48-LQFP
• For Use With: RCDK8C - KIT DEV EVAL FOR CAN R8C/23R0E521237CPE00 - EMULATOR COMPACT R8C/20/21/22/23
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/22 Group, R8C/23 Group
Rev.2.00 Aug 20, 2008
REJ09B0251-0200
Figure 12.6
Address bus
12.1.6.4
CPU clock
Data bus
An interrupt sequence is performed between an interrupt request acknowledgement and interrupt routine
execution.
When an interrupt request is generated while an instruction is executed, the CPU determines its interrupt
priority level after the instruction is completed. The CPU starts the interrupt sequence from the following
cycle. However, in regards to the SMOVB, SMOVF, SSTR or RMPA instruction, if an interrupt request is
generated while executing the instruction, the MCU suspends the instruction to start the interrupt sequence.
The interrupt sequence is performed as follows.
Figure 12.6 shows the Time Required for Executing Interrupt Sequence.
After the interrupt sequence is completed, the instructions are
NOTES:
NOTE:
WR
RD
(1) The CPU gets interrupt information (interrupt number and interrupt request level) by reading the
(2) The FLG register immediately before entering the interrupt sequence is saved to the CPU internal
(3) The I, D and U flags in the FLG register are set as follows:
(4) The CPU’s internal temporary register
(5) The PC is saved to the stack.
(6) The interrupt priority level of the acknowledged interrupt is set in the IPL.
(7) The starting address of the interrupt routine set in the interrupt vector is stored in the PC.
1. The indeterminate state depends on the instruction queue buffer. A read cycle occurs when the instruction queue
buffer is ready to acknowledge instructions.
1. This register cannot be used by user.
2. For operations of the IR bit, refer to 12.6 Timer RD Interrupt, Clock Synchronous Serial I/O with
address 00000h. The IR bit for the corresponding interrupt is set to 0 (interrupt not requested)
temporary register
The I flag is set to 0 (disables interrupts).
The D flag is set to 0 (disables single-step interrupt).
The U flag is set to 0 (ISP selected).
However, the U flag does not change state if an INT instruction for software interrupt number 32 to 63
is executed.
Chip Select Interrupts and I
Request Sources).
1
Interrupt Sequence
Time Required for Executing Interrupt Sequence
2
Address
0000h
information
Interrupt
3
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4
(1)
.
5
Indeterminate
Indeterminate
Indeterminate
6
2
7
C bus Interface Interrupts (Interrupts with Multiple Interrupt
8
(1)
SP-2 SP-1
is saved to the stack.
9
contents
SP-2
10
contents
SP-1
SP-4
11
contents
SP-4
12
SP-3
contents
SP-3
13
VEC
14
contents
VEC
15
VEC+1
contents
VEC+1
16
17
VEC+2
contents
VEC+2
18
12. Interrupts
19
(2)
PC
.
20