R5F21346CNFP#U0 Renesas Electronics America, R5F21346CNFP#U0 Datasheet - Page 681

• Manufacturer Part Number: R5F21346CNFP#U0
• Description: MCU 1KB FLASH 32K ROM 48-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/34Cr

Specifications of R5F21346CNFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, PWM, Voltage Detect, WDT
• Number Of I /o: 43
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/34C Group
REJ09B0586-0100 Rev.1.00 Jan 13, 2010
Page 648 of 723
31.5
31.5.1
In standard serial I/O mode, a serial programmer which supports the MCU can be used to rewrite the user ROM
area while the MCU is mounted on-board.
There are three types of standard serial I/O modes:
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•
•
Standard serial I/O mode 2 and standard serial I/O mode 3 can be used for the MCU.
Refer to Appendix 2. Connection Examples between Serial Writer and On-Chip Debugging Emulator for
examples of connecting to a serial programmer. Contact the serial programmer manufacturer for more information.
Refer to the user’s manual included with your serial programmer for instructions.
Table 31.7 lists the Pin Functions (Flash Memory Standard Serial I/O Mode 2) and Figure 31.17 shows Pin
Handling in Standard Serial I/O Mode 2. Table 31.8 lists the Pin Functions (Flash Memory Standard Serial I/O
Mode 3) and Figure 31.18 shows Pin Handling in Standard Serial I/O Mode 3.
After handling the pins shown in Table 31.8 and rewriting the flash memory using the programmer, apply a “H”
level signal to the MODE pin and reset the hardware to run a program in the flash memory in single-chip mode.
Standard serial I/O mode 1 .................Clock synchronous serial I/O used to connect to a serial programmer
Standard serial I/O mode 2 .................Clock asynchronous serial I/O used to connect to a serial programmer
Standard serial I/O mode 3 .................Special clock asynchronous serial I/O used to connect to a serial
The ID code check function determines whether the ID codes sent from the serial programmer and those written
in the flash memory match.
Refer to 12. ID Code Areas for details of the ID code check.
Standard Serial I/O Mode
ID Code Check Function
programmer
31. Flash Memory