R5F211B1SP#U0 Renesas Electronics America, R5F211B1SP#U0 Datasheet - Page 316
![IC R8C MCU FLASH 4K 20SSOP](/photos/12/35/123585/r5f211b1sp_u0_sml.jpg)
R5F211B1SP#U0
Manufacturer Part Number
R5F211B1SP#U0
Description
IC R8C MCU FLASH 4K 20SSOP
Manufacturer
Renesas Electronics America
Series
M16C™ M16C/R8C/Tiny/1Br
Datasheets
1.R5F211A2SPU0.pdf
(51 pages)
2.R5F211A2SPU0.pdf
(300 pages)
3.R5F211A2SPU0.pdf
(341 pages)
Specifications of R5F211B1SP#U0
Core Processor
R8C
Core Size
16-Bit
Speed
20MHz
Connectivity
I²C, SIO, SSU, 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 4x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 85°C
Package / Case
20-SSOP
For Use With
R0K5211B4S001BE - KIT STARTER FOR R8C/18191A1BR0K5211B4S000BE - KIT DEV EVALUATION R8C/1BR0E521174CPE10 - EMULATOR COMPACT R8C/18/19/1
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
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R8C/1A Group, R8C/1B Group
Rev.1.30
REJ09B0252-0130
Figure 20.1
20.2.5
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 20.1 shows an Example of Procedure for Changing Interrupt Sources.
Dec 08, 2006
Changing Interrupt Sources
Example of Procedure for Changing Interrupt Sources
NOTES:
IR bit:
1. Execute the above settings individually. Do not execute two
2. Use the I flag for the INTi (i = 0 to 3) interrupts.
3. Refer to 12.5.6 Changing Interrupt Control Register for
Page 298 of 315
or more settings at once (by one instruction).
To prevent interrupt requests from being generated when
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.
the instructions to be used and usage notes.
The interrupt control register bit of an
interrupt whose source is changed.
Set the IR bit to 0 (interrupt not requested)
Change interrupt source (including mode
using the MOV instruction
Interrupt source change
of peripheral function)
Disable interrupts
Enable interrupts
Change completed
(2, 3)
(2, 3)
(3)
20. Usage Notes
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