CHAPTER 17 µPD78F9436, 78F9456
17.1 Flash Memory Programming
The on-chip program memory in the µPD78F9436 and 78F9456 is a flash memory.
The flash memory can be written with the µPD78F9436 and 78F9456 mounted on the target system (on-board).
Connect the dedicated flash writer (Flashpro III (part no. FL-PR3, PG-FP3)) to the host machine and target system to
write the flash memory.
Remark FL-PR3 is made by Naito Densei Machida Mfg Co., Ltd.
17.1.1 Selecting communication mode
The flash memory is written by using Flashpro III and by means of serial communication. Select a communication
mode from those listed in Table 17-2. To select a communication mode, the format shown in Figure 17-1 is used.
Each communication mode is selected by the number of VPP pulses shown in Table 17-2.
Table 17-2. Communication Mode
Communication Mode
3-wire serial I/O
Pins Used
Number of VPP Pulses
SCK20/ASCK20/P23
SO20/TxD20/P24
SI20/RxD20/P25
0
8
UART
TxD20/SO20/P24
RxD20/SI20/P25
Caution Be sure to select a communication mode depending on the number of VPP pulses
shown in Table 17-2.
Figure 17-1. Communication Mode Selection Format
10 V
V
PP
V
DD
1
2
n
V
SS
V
DD
RESET
V
SS
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User’s Manual U15075EJ1V0UM00
NEC [ NEC ]
