R5F21191SP#U0 Renesas Electronics America, R5F21191SP#U0 Datasheet - Page 112

• Manufacturer Part Number: R5F21191SP#U0
• Description: IC R8C MCU FLASH 8K 20SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/19r

Specifications of R5F21191SP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SIO, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 13
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 4x1b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-SSOP
• For Use With: R0K521134S000BE - KIT EVAL STARTER FOR R8C/13R0E521174CPE10 - EMULATOR COMPACT R8C/18/19/1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/18 Group, R8C/19 Group
Rev.1.30
REJ09B0222-0130
Figure 12.20
12.5.5
The IR bit in the interrupt control register may be set to 1 (interrupt requested) when the interrupt
source changes. When using an interrupt, set the IR bit to 0 (no interrupt requested) after changing
the interrupt source.
In addition, changes of interrupt sources include all factors that change the interrupt sources
assigned to individual software interrupt numbers, polarities, and timing. Therefore, if a mode change
of a peripheral function involves interrupt sources, edge polarities, and timing, set the IR bit to 0 (no
interrupt requested) after the change. Refer to the individual peripheral function for its related
interrupts.
Figure 12.20 shows an Example of Procedure for Changing Interrupt Sources.
Apr 14, 2006
Changing Interrupt Sources
Example of Procedure for Changing Interrupt Sources
NOTES:
1. Execute the above settings individually. Do not execute
2. Use the I flag for the INTi (i = 0 to 3) interrupts.
3. Refer to 12.5.6 Changing Interrupt Control Register
IR bit: The interrupt control register bit of an
To prevent interrupt requests from being generated when
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two or more settings at once (by one instruction).
using peripheral function interrupts other than the INTi
interrupt, disable the peripheral function before changing
the interrupt source. In this case, use the I flag if all
maskable interrupts can be disabled. If all maskable
interrupts cannot be disabled, use bits ILVL0 to ILVL2 of
the interrupt whose source is changed.
Contents for the instructions to be used and usage notes.
Set the IR bit to 0 (interrupt not requested) using
interrupt whose source is changed.
Change interrupt source (including mode
Interrupt source change
the MOV instruction
Disable interrupts
of peripheral function)
Enable interrupts
Change completed
(2, 3)
(2, 3)
(3)
12. Interrupts