R5F21346CNFP#U0 Renesas Electronics America, R5F21346CNFP#U0 Datasheet - Page 678

• 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 645 of 723
Figure 31.15
31.4.11.7 Block Blank Check Command
This command is used to confirm that all addresses in any block are blank data FFh.
When 25h is written in the first bus cycle and D0h is written in the second bus cycle to any block address, blank
checking starts in the specified block. The FST7 bit in the FST register can be used to confirm whether blank
checking has completed. The FST7 bit is set to 0 during the blank-check period and set to 1 when blank
checking completes.
After blank checking has completed, the blank-check result can be confirmed by the FST5 bit in the FST
register. (Refer to 31.4.12 Full Status Check.). This command is used to verify the target block has not been
written to. To confirm whether erasure has completed normally, execute the full status check.
Do not execute the block blank check command when the FST6 bit is set to 1 (during erase-suspend).
Figure 31.15 shows a Block Blank Check Flowchart.
This commanded is intended for programmer manufactures, not for general users.
Block Blank Check Flowchart
Write the command code 25h
Write D0h to the starting
block address
Full status check
FST7 = 1?
Completed
Start
Yes
No
FST7: Bit in FST register
31. Flash Memory