Datasheet

Section 19 Flash Memory

Rev. 3.00 Sep. 28, 2009 Page 549 of 710

REJ09B0384-0300

11. The parameter which is required for programming is set.

The start address of the programming destination of the user MAT (FMPAR) is set to general

ER0.

⎯ Example of the FMPAR setting

FMPAR specifies the programming destination address. When an address other than one in

the user MAT area is specified, even if the programming program is executed,

programming is not executed and an error is returned to the return value parameter FPFR.

Since the unit is 128 bytes, the lower eight bits of the address must be H'00 or H'80 as the

boundary of 128 bytes.

⎯ Example of the FMPDR setting

When the storage destination of the program data is flash memory, even if the program

execution routine is executed, programming is not executed and an error is returned to the

FPFR parameter. In this case, the program data must be transferred to the on-chip RAM

and then programming must be executed.

12. Programming

There is an entry point of the programming program in the area from the start address specified

by FTDAR + 16 bytes of the on-chip RAM. The subroutine is called and programming is

executed by using the following steps.

MOV.L #DLTOP+16,ER2 ; Set entry address to ER2

JSR @ER2 ; Call programming routine

NOP

⎯ The general registers other than R0L are held in the programming program.

⎯ R0L is a return value of the FPFR parameter.

⎯ Since the stack area is used in the programming program, a stack area of 128 bytes at the

maximum must be allocated in RAM.

13. The return value in the programming program, FPFR (general register R0L) is determined.

14. Determine whether programming of the necessary data has finished.

If more than 128 bytes of data are to be programmed, specify FMPAR and FMPDR in 128-

byte units, and repeat steps 12 to 14. Increment the programming destination address by 128

bytes and update the programming data pointer correctly. If an address which has already been

programmed is written to again, not only will a programming error occur, but also flash

memory will be damaged.