R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 96
![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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- Download datasheet (6Mb)
R8C/22 Group, R8C/23 Group
Rev.2.00 Aug 20, 2008
REJ09B0251-0200
Figure 10.3
System Clock Control Register 1
b7 b6 b5 b4 b3 b2 b1
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
Set the PRC0 bit in the PRCR register to 1 (enables w riting) before rew riting to the CM1 register.
When entering stop mode, the CM15 bit is set to 1 (drive capacity high).
When the CM06 bit is set to 0 (CM16, CM17 bits enabled), the CM16 to CM17 bits become enabled.
If the CM10 bit is 1 (stop mode), the internal feedback resistor becomes disabled.
When the OCD2 bit is set to 0 (selects XIN clock), the CM14 bit is set to 1 (stops low -speed on-chip oscillator). When
the OCD2 bit is set to 1 (selects on-chip oscillator clock), the CM14 bit is set to 0 (low -speed on-chip oscillator on). It
remains unchanged even if it is set to 1.
When using the low voltage 2 detection interrupt (w hen using the digital filter), set the CM14 bit to 0 (low -speed on-
chip oscillator on).
When the CM10 bit is set to 1 (stop mode) and the CM13 bit is set to 1 (XIN-XOUT pin), the XOUT
(P4_7) pin becomes “H”. When the CM13 bit is set to 0 (input ports, P4_6, P4_7), the P4_7 (XOUT) enters
input mode.
In count source protect mode (Refer to 13.2 Count Source Protection Mode Enabled), the value remains
unchanged even if the CM10 and CM14 bits are set.
Once the CM13 bit is set to 1, it can not to 0 in a program.
0 0
CM1 Register
b0
Bit Symbol
(b2-b1)
Symbol
CM10
CM13
CM14
CM15
CM16
CM17
Page 74 of 501
CM1
—
All clock stop control bit
Reserved bits
Port XIN-XOUT sw itch bit
Low -speed on-chip oscillation stop
bit
XIN-XOUT drive capacity select bit
System clock division select bits 1
(1)
(5,6,8)
Address
Bit Name
0007h
(4,7,8)
(7,9)
(3)
(2)
b7 b6
0 0 : No division mode
0 1 : Divide-by-2 mode
1 0 : Divide-by-4 mode
1 1 : Divide-by-16 mode
0 : Oscillates clock
1 : Stops all clocks (stop mode)
Set to 0
0 : Input ports P4_6, P4_7
1 : XIN-XOUT pin
0 : Low -speed on-chip oscillator on
1 : Low -speed on-chip oscillator off
0 : Low
1 : High
After Reset
00100000b
Function
10. Clock Generation Circuit
RW
RW
RW
RW
RW
RW
RW
RW
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