32186 datasheet(179/1032 Pages) RENESAS

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INTERNAL MEMORY

6-37

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

6.6 Programming Internal Flash Memory

(3) Lock Bit Program command

The internal flash memory can be protected against programming/erase operation one block at a time. The

Lock Bit Program command is provided for protecting the flash memory blocks.

Write the Lock Bit Program command (H’7777) to any address of the internal flash memory. Next, write the

Verify command (H’D0D0) to the last even address of the flash memory block to be protected, and this

memory block is thereby protected against programming/erase operation. To remove protection, use the

Flash Control Register 2 (FCNT2) FPROT (Rock bit protect control) bit to invalidate protection by a lock bit

and erase the flash memory block whose protection is to be removed. (The content of that memory block is

also erased.)

Lock bit programming is automatically performed by the internal control circuit, and whether the Lock Bit

Program command has finished can be known by checking the Flash Status Register (FSTAT) FBUSY

(Flash busy) bit. While the FBUSY bit = "0," the next programming cannot be performed.

The table below lists the target flash memory blocks and their addresses to be specified when writing the

Verify command data.

Table 6.6.3 Target Blocks and Specified Addresses

Target Block

Specified Address

H'0000 1FFE

H'0000 2FFE

H'0000 3FFE

H'0000 7FFE

H'0000 FFFE

H'0001 FFFE

H'0002 FFFE

H'0003 FFFE

H'0004 FFFE

H'0005 FFFE

H'0006 FFFE

H'0007 FFFE

H'0008 FFFE

H'0009 FFFE

H'000A FFFE

H'000B FFFE

H'000C FFFE

H'000D FFFE

H'000E FFFE

H'000F FFFE

Note: • Block 12 to block 19 exist only in the 32186 and do not exist in the 32185.

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