Self-Programming Enable; Self-Programming Library Functions - NEC V850ES/F 3-L Series User Manual

32-bit single-chip microcontroller

Table of Contents

7.3.1 Self-programming enable

The self-programming functions can be started out of the normal user mode of

the microcontroller.

The microcontroller must be set into self-programming mode via the self-

programming library.

For security reasons writing and erasing of the flash memory must be

additionally permitted by setting the external FLMD0 pin to high level. Note that

FLMD0 holds low level in normal operation mode after reset release.

This requires some external components or wiring, e.g. connecting an output

port to FLMD0.

RESET signal

Self-programming enable

When self-programming has been completed, the voltage on the FLMD0 pin

must be returned to VSS.

Code flash memory self-programming by the user's program is supported by

the self-programming library.

This library provides a set of C function calls to carry out basic functions like

• blank-check/erase/rewrite/verify of the flash

• boot cluster swapping, including definition of boot block clusters

• definition of the variable reset vector

• setting of protection flags

• obtain various information concerning the code flash memory

Detailed information how to use the library functions is given in the Application

Note: "Self-Programming Library for embedded Single Voltage FLASH"

(document no. U16929EE).

The up-to-date version of the self-programming library and the above

mentioned Application Note can be obtained from http://www.eu.necel.com.

User's Manual U18743EE1V2UM00

Self-programming

operation mode

Flash Memory

operation mode