R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 514
![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
Table 22.6
NOTES:
Mode
EW1 During automatic erasing
22.9.1.4
22.9.1.5
22.9.1.6
1. Do not use the address match interrupt while the command is executed because the vector of the
2. Do not use the non-maskable interrupt while block 0 is automatically erased because the fixed
Write 0 to the corresponding bits before writing 1 when setting the FMR01, FMR02, or FMR11 bit to 1. Do not
generate an interrupt between writing 0 and 1.
In EW0 mode, if the power supply voltage drops while rewriting any block in which the rewrite control
program is stored, the flash memory may not be able to be rewritten because the rewrite control program cannot
be rewritten correctly. In this case, use standard serial I/O mode.
Do not write additions to the already programmed address.
address match interrupt is allocated on ROM.
vector is allocated block 0.
(erase-suspend function
is enabled)
During automatic erasing
(erase-suspend function
is disabled)
During automatic
programming
(program suspend
function enabled)
Auto programming
(program suspend
function disabled)
EW1 Mode Interrupts
How to Access
Rewriting User ROM Area
Program
Status
Page 492 of 501
The auto-erasing is suspended
after td(SR-SUS) and the
interrupt process is executed.
The auto-erasing can be
restarted by setting the FMR41
bit in the FMR4 register to 0
(erase restart) after the
interrupt process completes.
The auto-erasing has a priority
and the interrupt request
acknowledgement is waited.
The interrupt process is
executed after the auto-erasing
completes.
The auto-programming is
suspended after td(SR-SUS)
and the interrupt process is
executed. The auto-
programming can be restarted
by setting the FMR42 bit in the
FMR4 register to 0 (program
restart) after the interrupt
process completes.
The auto-programming has a
priority and the interrupt
request acknowledgement is
waited. The interrupt process is
executed after the auto-
programming completes.
Request is Acknowledged
When Maskable Interrupt
Stop Detection and Voltage Monitor 2
Once an interrupt request is
acknowledged, the auto-
programming or auto-erasing is
forcibly stopped immediately and
resets the flash memory. An interrupt
process starts after the fixed period
and the flash memory restarts. Since
the block during the auto-erasing or
the address during the auto-
programming is forcibly stopped, the
normal value may not be read.
Execute the auto-erasing again and
ensure the auto-erasing is completed
normally.
Since the watchdog timer does not
stop during the command operation,
the interrupt request may be
generated. Reset the watchdog timer
regularly using the erase-suspend
function.
Interrupt Request are Acknowledged
When Watchdog Timer, Oscillation
22. Usage Notes
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