R5F21324CNSP#U0 Renesas Electronics America, R5F21324CNSP#U0 Datasheet - Page 529

• 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 500 of 573
Figure 29.14
29.4.11.6 Read Lock Bit Status Command
This command is used to read the lock bit status of any address in the program ROM area.
When 71h written in the first bus cycle and D0h is written in the second cycle to the starting block address, the
lock bit status of the specified block is stored in the LBDATA bit in the FST register. After the FST7 bit in the
FST register has been set to 1 (ready), read the LBDATA bit.
Figure 29.14 shows a Read Lock Bit Status Flowchart.
Read Lock Bit Status Flowchart
Write the command code 71h
Write D0h to the starting
block address
Full status check
Completed
FST7 = 1?
Start
Yes
No
FST7: Bit in FST register
29. Flash Memory