r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 678

• Manufacturer Part Number: r5f21368sdfp
• Description: Renesas Mcu R8c Family / R8c/3xt-a Series
• Manufacturer: Renesas Electronics Corporation.

Under development
R8C/36T-A Group
R01UH0240EJ0001 Rev.0.01
Apr 28, 2011
Figure 26.14
26.5.7.6
This command is used to read the lock bit status of any block in the program ROM area.
When 71h is written in the first bus cycle and D0h is written in the second cycle to the start address of the block,
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 26.14 shows a Read Lock Bit Status Flowchart.
Read Lock Bit Status Command
Preliminary document
Specifications in this document are tentative and subject to change.
Read Lock Bit Status Flowchart
Write the command code
Write D0h to the start
address of the block
Full status check
Completed
FST7 = 1?
Start
71h
Yes
No
FST7: Bit in FST register
26. Flash Memory
Page 647 of 725