R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 420

• 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
18.14.3 Suggestions to Reduce Power Consumption
Table 18.5
NOTES:
Table 18.6
NOTES:
Rs Pin
Power Consumption
in CAN Transceiver
CAN Communication
Connection
STB Pin
EN Pin
Power Consumption
in CAN Transceiver
CAN Communication
Connection
1. The pin which controls the operation mode of CAN transceiver.
2. In case of Topr = 25°C
3. Connect to enabled port to control CAN transceiver.
1. The pin which controls the operation mode of CAN transceiver.
2. In case of Topr = 25°C
3. Connect to enabled port to control CAN transceiver.
When not performing CAN communication, the operation mode of CAN transceiver should be set to “standby
mode” or “sleep mode”.
When performing CAN communication, the power consumption in CAN transceiver in not performing CAN
communication can be substantially reduced by controlling the operation mode pins of CAN transceiver.
Table 18.5 and Table 18.6 show Recommended Pin Connections.
(1)
(1)
(1)
Recommended Pin Connections (In Case of PCA82C250: Philips Product)
Recommended Pin Connections (In Case of PCA82C252: Philips Product)
(2)
(2)
Page 398 of 501
R8C/22, R8C/23
R8C/22, R8C/23
CRX0
Por
CRX0
Por
Por
CTX0
CTX0
less than 170 µA
t
t
t
less than 50 µA
(3)
(3)
(3)
Standby Mode
Sleep Mode
impossible
impossible
“L” output
“H”output
“H”
“L”
“L”
PCA82C250
PCA82C252
TXD
RXD
Rs
TXD
RXD
STB
EN
CANH
CANH
CANL
CANL
R8C/22, R8C/23
R8C/22, R8C/23
Normal Operation Mode
CRX0
Por
CRX0
Por
Por
CTX0
CTX0
High-speed Mode
less than 70 mA
t
less than 35 mA
t
t
(3)
(3)
(3)
“H” output
“L” output
possible
possible
“H”
“H”
“L”
PCA82C250
PCA82C252
TXD
RXD
Rs
TXD
RXD
STB
EN
18. CAN Module
CANH
CANH
CANL
CANL