Flash Memory Programming; Selecting Communication Mode - NEC mPD789101 User Manual

18.1 Flash Memory Programming

The on-chip program memory in the µ PD78F9116, 78F9136 is flash memory.
The flash memory can be written with the µ PD78F9116 mounted on the target system (on-board). Connect the
dedicated flash programmer (Flashpro III (part number: 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.

18.1.1 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 18-2. To select a communication mode, the format shown in Figure 18-1 is used.
Each communication mode is selected by the number of V
Communication Mode
3-wire serial I/O
UART
Pseudo 3-wire mode
Note Serial transfer is performed by controlling a port by software.
Caution Be sure to select a communication mode based on the V
10 V
V V
PP DD
V
SS
V
DD
RESET
V
SS
232
CHAPTER 18 µ PD78F9116, 78F9136
Table 18-2. Communication Mode
Pins Used
SCK20/ASCK20/P20
SO20/TxD20/P21
SI20/RxD20/P22
TxD20/SO20/P21
RxD20/SI20/P22
Note
P00 (Serial clock input)
P01 (Serial data output)
P02 (Serial data input)
Figure 18-1. Communication Mode Selection Format
User's Manual U13045EJ2V0UM00
pulses shown in Table 18-2.
PP
Number of V
0
8
12
pulse number shown in Table 18-2.
PP
1 2
Pulses
PP
n