R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 433

• 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
19.5
Figure 19.10
Parasitic Diode
Parasitic Diode
Figure 19.10 shows the Internal Equivalent Circuit of Analog Input.
AN0
Control signal
for SW2
Control signal
for SW3
Internal Equivalent Circuit of Analog Input
NOTE:
VREF
AVSS
i = 12
AN11
1. Use only as a standard for designing this data.
VCC
VSS
Mass production may cause some changes in device characteristics.
A/D Control Register 0
Internal Equivalent Circuit of Analog Input
Comparison reference voltage
b4
ON Resistor
Approx. 2k Ω Wiring Resistor
ON Resistor
Approx. 2k Ω Wiring Resistor
VCC VSS
b2
SW1
SW1
i Ladder-type
Switches
(Vref) generator
b1
Page 411 of 501
C onnect to
C onnect to
Sampling C om parison
b0
Approx. 0.2k Ω
Approx. 0.2k Ω
Resistor
ladder
C onnect to
C onnect to
i Ladder-type
Wiring Resistors
ON Resistor
Approx. 0.6k Ω
ON Resistor
Approx. 0.6k f
Control Signal
Control Signal
SW2
Reference
Sampling
SW5
SW1 conducts only on the ports selected for analog input.
SW2 and SW3 are open when A/D conversion is not in progress;
their status varies as shown by the waveforms in the diagrams on the left.
SW4 conducts only when A/D conversion is not in progress.
SW5 conducts when A/D conversion is Comparison.
VIN
Vref
Comparison
Analog Input
voltage
Voltage
C = Approx.1.5pF
SW4
AVSS
AVCC
Conversion Register
ON Resistor
Approx. 5k Ω
A/D Successive
Chopper-type
SW3
AMP
Amplifier
Interrupt Request
A/D Conversion
19. A/D Converter