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6. PROGRAMMING FLASH MEMORY
The flash memory can be written with the µ PD78F4225Y mounted on the target board (on-board). To do so,
connect a dedicated flash writer (Flashpro II) to the host machine and target system.
Remark Flashpro II is a product of Naito Densei Machida Mfg. Co., Ltd.
6.1 Selecting Communication Mode
To write the flash memory, use Flashpro II and serial communication. Select a serial communication mode from
those listed in Table 6-1 in the format shown in Figure 6-1. Each communication mode is selected by the number
of V
pulses shown in Table 6-1.
PP
Communication Mode
3-wire serial I/O
2
I
C bus
UART
Psendo-3-wire serial
Note
I/O
Note Performs serial transfer by controlling port by software.
Caution
Be sure to select a communication mode with the number of V
V
PP
RESET
Table 6-1. Communication Modes
Number of Channels
3
1
2
1
Figure 6-1. Communication Mode Selecting Format
10 V
V
DD
1
V
SS
V
DD
V
SS
Pins Used
Number of V
SCK0/SCL0/P27
0
SO0/P26
SI0/SDA0/P25
SCK1/ASCK1/P22
1
SO1/TxD1/P21
SI1/RxD1/P20
SCK2/ASCK2/P72
2
SO2/TxD2/P71
SI2/RxD2/P70
SCL0/SCK0/P27
4
SDA0/SI0/P25
TxD1/SO1/P21
8
RxD1/SI1/P20
TxD2/SO2/P71
9
RxD2/SI2/P70
P32/TO2
12
(serial clock I/O)
P31/TO1
(serial data output)
P30/TO0
(serial data output)
pulses shown in Table 6-1.
PP
2
n
µ PD78F4225Y
Pulses
PP
17
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