R5F21324CNSP#U0 Renesas Electronics America, R5F21324CNSP#U0 Datasheet - Page 530

• Manufacturer Part Number: R5F21324CNSP#U0
• Description: MCU 1KB FLASH 16K ROM 20-LSSOP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/32Cr

Specifications of R5F21324CNSP#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: 15
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-LSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/32C Group
REJ09B0573-0100 Rev.1.00 Dec. 18, 2009
Page 501 of 573
Figure 29.15
29.4.11.7 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 29.4.12 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 29.15 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
29. Flash Memory