Eeprom Features (Program Memory); Programming Environment - NEC PD789860 User Manual

17.1 EEPROM Features (Program Memory)

The on-chip program memory in the
This chapter describes the functions of the EEPROM incorporated in the program memory area.
EEPROM incorporated in data memory, see CHAPTER 5 EEPROM (DATA MEMORY).
EEPROM can be written with the
Connect the dedicated flash writer (Flashpro III (part no. FL-PR3, PG-FP3)/Flashpro IV (part no. FL-PR4, PG-FP4)) to
the host machine and target system to write to EEPROM.
Remark FL-PR3 and FL-PR4 are products of Naito Densei Machida Mfg. Co., Ltd (TEL +81-45-475-4191).
Programming using EEPROM has the following advantages.
• Software can be modified after the microcontroller is solder-mounted on the target system.
• Distinguishing software facilities small-quantity, varied model production
• Easy data adjustment when starting mass production

17.1.1 Programming environment

The following shows the environment required for
When Flashpro III (part no. FL-PR3, PG-FP3) or Flashpro IV (part no. FL-PR4, PG-FP4) is used as a dedicated
flash programmer, a host machine is required to control the dedicated flash programmer. Communication between
the host machine and flash programmer is performed via RS-232C/USB (Rev. 1.1).
For details, refer to the manuals for Flashpro III/Flashpro IV.
Remark USB is supported by Flashpro IV only.
Figure 17-1. Environment for Writing Program to EEPROM (Program Memory)
Host machine
160
µ
CHAPTER 17 PD78E9860A, 78E9861A
µ
PD78E9860A and 78E9861A is EEPROM.
µ
PD78E9860A and 78E9861A mounted on the target system (on-board).
µ
PD78E9860A, 78E9861A EEPROM programming.
RS-232C
USB
Dedicated flash
programmer
User's Manual U14826EJ5V0UD
V
PP
V
DD
V
SS
RESET
µ
PD78E9860A,
Pseudo 3-wire
µ
PD78E9861A
For the