R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 57
![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
6.
The voltage detection circuit is a circuit to monitor the input voltage to the VCC pin. This circuit monitors the VCC
input voltage by the program. And the voltage monitor 1 reset, voltage monitor 2 interrupt and voltage monitor 2 reset
can be used.
Table 6.1 lists the Specifications of Voltage Detection Circuit and Figures 6.1 to 6.3 show the Block Diagrams.
Figures 6.4 to 6.6 show the Associated Registers.
Table 6.1
VCC Monitor
Process When Voltage Is
Detected
Digital Filter
Voltage Detection Circuit
Specifications of Voltage Detection Circuit
Page 35 of 501
Item
Voltage to monitor
Detection target
Monitor
Reset
Interrupt
Switch
enabled/disabled
Sampling time
Vdet1
Whether passing
through Vdet1 by rising
or falling
None
Voltage monitor 1 reset
Reset at Vdet1 > VCC;
Restart CPU operation at
VCC > Vdet1
None
Available
(Divide-by-n of fOCO-S)
x 4
n: 1, 2, 4 and 8
Voltage Detection 1
Vdet2
Whether passing
through Vdet2 by rising
or falling
VCA13 bit in VCA1
register
Whether VCC is higher
or lower than Vdet2
Voltage monitor 2 reset
Reset at Vdet2 > VCC
Restart CPU operation
after a specified time
Voltage monitor 2
interrupt
Interrupt request at
Vdet2 > VCC and VCC >
Vdet2 when digital filter
is enabled;
Interrupt request at
Vdet2 > VCC or VCC >
Vdet2 when digital filter
is disabled
Available
(Divide-by-n of fOCO-S)
x 4
n: 1, 2, 4 and 8
6. Voltage Detection Circuit
Voltage Detection 2
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