Functional Outline - NEC 78K0S/KA1+ User Manual

18.3 Functional Outline

The internal flash memory of the 78K0S/KA1+ can be rewritten by using the rewrite function of the dedicated flash
programmer, regardless of whether the 78K0S/KA1+ has already been mounted on the target system or not (on-
board/off-board programming).
The function for rewriting a program with the user program (self programming), which is ideal for an application
when it is assumed that the program is changed after production/shipment of the target system, is provided.
Refer to Figure 18-1 for the flash memory writing control function.
In addition, a security function that prohibits rewriting the user program written to the internal flash memory is also
supported, so that the program cannot be changed by an unauthorized person.
Refer to 18.7.3 Security settings for details on the security function.
Rewrite Method
On-board programming
Off-board programming
Self programming
Remarks 1. The FA series is a product of Naito Densei Machida Mfg. Co., Ltd.
2. Refer to the following sections for details on the flash memory writing control function.
• 18.7 On-Board and Off-Board Flash Memory Programming
• 18.8 Flash Memory Programming by Self Writing
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CHAPTER 18 FLASH MEMORY
Table 18-1. Rewrite Method
Functional Outline
Flash memory can be rewritten after the device is mounted on the
target system, by using a dedicated flash programmer.
Flash memory can be rewritten before the device is mounted on the
target system, by using a dedicated flash programmer and a dedicated
program adapter board (FA series).
Flash memory can be rewritten by executing a user program that has
been written to the flash memory in advance by means of on-board/off-
board programming.
User's Manual U16898EJ3V0UD
Operation Mode
Flash memory
programming mode
Self programming mode