upd78f0124hgba1-8et-a Renesas Electronics Corporation., upd78f0124hgba1-8et-a Datasheet - Page 402

• Manufacturer Part Number: upd78f0124hgba1-8et-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

24.7 Flash Memory Programming by Self-Writing
program, so that the program can be upgraded in the field.
register (FLPMC).
402
The 78K0/KD1+ supports a self-programming function that can be used to rewrite the flash memory via a user
The programming mode is selected by bits 0 and 1 (FLSPM0 and FLSPM1) of the flash programming mode control
The procedure of self-programming is illustrated below.
Remark For details of the self programming function, refer to the 78K0/Kx1+ Flash Memory Self Programming
User’s Manual (U16701E).
Figure 24-17. Self-Programming Procedure
according to parameter contents
FLSPM1, FLSPM0 = 0, 1
FLSPM1, FLSPM0 = 0, 0
End of self-programming
Secure entry RAM area
FLMD0
Start self-programming
FLMD0
Read parameters on RAM
and access flash memory
Mask interrupts again
Mask all interrupts
User’s Manual U16962EJ3V0UD
Set parameters
CALL #8100H
to entry RAM
CHAPTER 24 FLASH MEMORY
pin = High level
pin = Low level
Entry program
(user program)
Firmware
Entry program
(user program)