R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 441

• 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
20.3
Figure 20.3
20.3.1
Standard serial I/O mode contains an ID code check function, and the parallel I/O mode contains a ROM code
protect function to prevent the flash memory from reading or rewriting easily.
Use this function in standard serial I/O mode. Unless the flash memory is blank, the ID codes sent from the
programmer and the ID codes written in the flash memory are determined whether they match. If the ID codes
do not match, the commands sent from the programmer are not acknowledged. The ID code consists of 8-bit
data, the areas of which, beginning with the first byte, are 00FFDFh, 00FFE3h, 00FFEBh, 00FFEFh, 00FFF3h,
00FFF7h, and 00FFFBh. Write a program in which the ID codes are set at these addresses and write them in the
flash memory.
Functions to Prevent Rewriting of Flash Memory
ID Code Check Function
Address for Stored ID Code
Page 419 of 501
00FFDFh to 00FFDCh
00FFE3h to 00FFE0h
00FFE7h to 00FFE4h
00FFEBh to 00FFE8h
00FFEFh to 00FFECh
00FFF3h to 00FFF0h
00FFF7h to 00FFF4h
00FFFBh to 00FFF8h
00FFFFh to 00FFFCh
NOTE:
1. The OFS register is assigned to 00FFFFh. Refer to
Address
Figure 20.4 OFS Register for the OFS register
details.
ID1
ID2
ID3
ID4
ID5
ID6
ID7
(1)
Undefined instruction vector
Overflow vector
BRK instruction vector
Address match vector
Single step vector
Oscillation stop detection/watchdog
timer/voltage monitor 2 vector
Address break
Reset vector
4 bytes
(Reserved)
20. Flash Memory