R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 61

• 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

R8C/22 Group, R8C/23 Group
Rev.2.00 Aug 20, 2008
REJ09B0251-0200
Figure 6.5
Voltage Monitor 1 Circuit Control Register
b7 b6 b5 b4
NOTES:
1.
2.
3.
4.
Set the PRC3 bit in the PRCR register to 1 (w rite enable) before w riting to the VW1C register.
The value other than the VW1CO and VW1C6 bits remains unchanged after softw are reset, w atchdog timer reset,
and voltage monitor 2 reset.
The VW1C0 bit is enabled w hen the VCA26 bit in the VCA2 register is set to 1 (voltage detection 1 circuit
enabled). Set the VW1C0 bit to 0 (disable), w hen the VCA26 bit is set to 0 (voltage detection 1 circuit disabled).
The VW1C7 bit is enabled w hen the VW1C1 bit is set to 1 (digital filter disabled mode).
b3 b2
0
VW1C Register
b1 b0
Bit Symbol
VW1C0
VW1C2
VW1C6
VW1C7
VW1C1
VW1F0
VW1F1
Symbol
VW1C
Page 39 of 501
(b3)
—
Voltage monitor 1 reset enable
bit
Voltage monitor 1 digital filter
disable mode select bit
Reserved bit
Reserved bit
Sampling clock select bits
Voltage monitor 1 circuit mode
select bit
Voltage monitor 1 reset generation
condition select bit
(3)
(1)
Address
Bit Name
0036h
(4)
b5 b4
0 0 : fOCO-S divide-by-1
0 1 : fOCO-S divide-by-2
1 0 : fOCO-S divide-by-4
1 1 : fOCO-S divide-by-8
The LVD1ON bit in the OFS register is set to 1: 0000X000b
Power-on reset, v oltage monitor 1 reset or the LVD1ON bit
in the OFS register is set to 0: 0100X001b
0 : Disable
1 : Enable
0 : Digital filter enabled mode
1 : Digital filter disabled mode
Set to 0
When read, the content is undefined.
When the VW1C0 bit is set to 1 (enables
voltage monitor 1 reset), set to 1.
When the VW1C1 bit is set to 1 (digital filter
disabled mode), set to 1.
(digital filter circuit enabled)
(digital filter circuit disabled)
Function
After Reset
6. Voltage Detection Circuit
(2)
RW
RW
RW
RW
RW
RW
RW
RW
RO