CHAPTER 13
µµµµ
PD78F9026A
User's Manual U11919EJ3V0UM00
180
13.1 Flash Memory Programming
The program memory provided to the
µ
PD78F9026A is flash memory.
The flash memory can be written on-board, i.e., with the
µ
PD78F9026A mounted on the target system.
To do so, connect a dedicated flash writer (Flashpro III (Part number: FL-PR3, PG-FP3)) to the host machine
and target system.
Remark
FL-PR3 is a product of Naito Densei Machida Mfg. Co., Ltd.
13.1.1 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 13-2. To select a communication mode, the format shown in Figure
13-1 is used. Each communication mode is selected depending on the number of V
PP
pulses shown in Table 13-2.
Table 13-2. Communication Modes
Communication Mode
Pins Used
Number of V
PP
Pulses
3-wire serial I/O
SCK0/ASCK/P20
SO0/TxD/P21
SI0/RxD/P22
0
UART
TxD/SO0/P21
RxD/SI0/P22
8
P00 (Serial clock input)
P01 (Serial data output)
P02 (Serial data input)
12
Pseudo 3-wire mode
Note
P40/KR0 (serial clock input)
P41/KR1 (serial data output)
P42/KR2 (serial data input)
13
Note
Serial transfer is performed by controlling the port with software.
Caution
Be sure to select a communication mode by the number of V
PP
pulses shown in Table 13-2.
Figure 13-1. Communication Mode Selection Format
1
2
n
10 V
V
DD
V
SS
V
PP
V
DD
V
SS
RESET
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