Flash Memory Characteristics; Programming Environment; Environment For Writing Program To Flash Memory - NEC switch User Manual

14.1 Flash Memory Characteristics

Flash memory programming is performed by connecting a dedicated flash programmer (Flashpro III (part no. FL-
PR3, PG-FP3)/Flashpro IV (part no. FL-PR4, PG-FP4)) to the target system with the µ PD78F9801 mounted on the
target system (on-board). A flash memory program adapter (FA adapter), which is a target board used exclusively for
programming, is also provided.
Remark FL-PR3, FL-PR4, and the program adapter are products made by Naito Densei Machida Mfg. Co., Ltd.
(TEL +81-45-475-4191).
Programming using flash memory 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

14.1.1 Programming environment

The following shows the environment required for µ PD78F9801 flash memory programming.
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 the manuals for Flashpro III/Flashpro IV.
Remark USB is supported by Flashpro IV only.
Figure 14-1. Environment for Writing Program to Flash Memory
Host machine
µ µ µ µ PD78F9801
CHAPTER 14
RS-232C
USB
Dedicated flash
programmer
User's Manual U12978EJ3V0UD
V
PP
V
DD
V
SS
RESET
3-wire serial I/O
µ
PD78F9801
or pseudo-3-wire
191