R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 109
![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 10.11
Step (1)
Step (2)
Step (3)
Step (4)
Step (5)
Step (6)
Step (7)
Step (8)
10.4.2.5
NOTES:
VCA20: Bit in VCA2 register
1. Execute this handling to all interrupt handlings generated around the WAIT instruction. If it is not necessary to start the high-speed
2. Do not set the VCA20 bit to 0 with the instruction immediately after setting the VCA20 bit to 1. Also, do not do the opposite.
3. When the VCA20 bit is set to 1, do not set the CM10 bit to 1 (stop mode).
4. When entering wait mode, follow 10.6.2 Wait Mode.
Internal power consumption can be reduced by using low-speed on-chip oscillator mode.
Figure 10.11 shows the Procedure for Enabling Reduced Internal Power Consumption Using VCA20 bit.
When enabling reduced internal power consumption using the VCA20 bit, follow Figure 10.11 Procedure for
Enabling Reduced Internal Power Consumption Using VCA20 bit.
clock or the high-speed on-chip oscillator in the interrupt handling, it does not need to be started.
VCA20 ← 1 (internal power low consumption
VCA20 ← 0 (internal power low consumption
Enter high-speed clock mode or high-speed
(Wait until XIN clock oscillation stabilizes)
Enter low-speed on-chip oscillator mode
low consumption enabled by VCA20 bit
Stop XIN clock and high-speed on-chip
Handling procedure of internal power
Start XIN clock or high-speed on-chip
Reducing Internal Power Consumption
Procedure for Enabling Reduced Internal Power Consumption Using VCA20 bit
on-chip oscillator mode
Enter wait mode
oscillator clock
oscillator clock
disabled)
enabled)
Page 87 of 501
(2)
(2)
(4)
Exit wait mode by
Step (5)
Step (6)
Step (7)
Step (8)
Step (1)
Step (2)
Step (3)
interrupt
VCA20 ← 0 (internal power low consumption
VCA20 ← 1 (internal power low consumption
Enter high-speed clock mode or high-speed
(Wait until XIN clock oscillation stabilizes)
Enter low-speed on-chip oscillator mode
Stop XIN clock and high-speed on-chip
Start XIN clock or high-speed on-chip
Interrupt handling completed
In interrupt handling routine
on-chip oscillator mode
Interrupt handling
oscillator clock
oscillator clock
enabled)
disabled)
(2,3)
(2)
(Note 1)
10. Clock Generation Circuit
If it is necessary to start
the high-speed clock or
the high-speed on-chip
oscillator in the interrupt
handling routine, execute
steps (5) to (7) in the
interrupt routine.
If the high-speed clock or
high-speed on-chip
oscillator is started in the
interrupt handling routine,
execute steps (1) to (3) at
the last of the interrupt
routine.
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