R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 491
![IC R8C/23 MCU FLASH 48-LQFP](/photos/12/38/123822/r5f21238dfp_u0_sml.jpg)
R5F21238DFP#U0
Manufacturer Part Number
R5F21238DFP#U0
Description
IC R8C/23 MCU FLASH 48-LQFP
Manufacturer
Renesas Electronics America
Series
R8C/2x/23r
Specifications of R5F21238DFP#U0
Core Size
16/32-Bit
Program Memory Size
64KB (64K x 8)
Peripherals
POR, Voltage Detect, WDT
Core Processor
R8C
Speed
20MHz
Connectivity
CAN, I²C, LIN, SIO, SSU, UART/USART
Number Of I /o
41
Program Memory Type
FLASH
Ram Size
3K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
48-LQFP
No. Of I/o's
41
Ram Memory Size
3KB
Cpu Speed
20MHz
No. Of Timers
4
Digital Ic Case Style
LQFP
Embedded Interface Type
CAN, I2C, UART
Rohs Compliant
Yes
Cpu Family
R8C
Device Core Size
16b
Frequency (max)
20MHz
Interface Type
I2C/UART
Total Internal Ram Size
3KB
# I/os (max)
41
Number Of Timers - General Purpose
5
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
3V
On-chip Adc
12-chx10-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
48
Package Type
LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
RCDK8C - KIT DEV EVAL FOR CAN R8C/23R0K521237S000BE - KIT DEV RSK R8C/23R0E521237CPE00 - EMULATOR COMPACT R8C/20/21/22/23
Eeprom Size
-
Lead Free Status / Rohs Status
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
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R8C/22 Group, R8C/23 Group
Rev.2.00 Aug 20, 2008
REJ09B0251-0200
Figure 22.1
22.2.4
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, the changes of interrupt sources include all sources that change the interrupt sources assigned to
individual software interrupt numbers, polarities, and timing. Therefore, when a mode change of the peripheral
functions involves interrupt sources, edge polarities, and timing, Set the IR bit to 0 (no interrupt requested) after
the change. Refer to each peripheral function for the interrupts caused by the peripheral functions.
Figure 22.1 shows an Example of Procedure for Changing Interrupt Sources.
Changing Interrupt Sources
Example of Procedure for Changing Interrupt Sources
NOTES:
IR bit:
1. Execute the above settings individually. Do not execute two
2. To prevent interrupt requests from being generated, disable
3. Refer to 12.6.5 Changing Interrupt Control Register
Page 469 of 501
or more settings at once (by one instruction).
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.
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)
22. Usage Notes
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