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CHAPTER 22
µ
PD78F0974
22.2 Flash Memory Programming
On-board writing of flash memory (with device mounted on target system) is supported.
On-board writing is done after connecting a dedicated flash writer (Flashpro II) to the host machine and target
system.
Moreover, writing to flash memory can also be performed using a flash memory writing adapter connected to
Flashpro II.
Remark
Flashpro II is a product of Naitou Densei Machidaseisakusho Co., Ltd.
22.2.1 Selection of transmission method
Writing to flash memory is performed using Flashpro II and serial communication. Select the transmission method
for writing from Table 22-3. For the selection of the transmission method, a format like the one shown in Figure
22-2 is used. The transmission methods are selected with the V
PP
pulse numbers shown in Table 22-3.
Table 22-3. Transmission Method List
Transmission Method
Number of Channels
Pin Used
Number of V
PP
Pulses
3-wire serial I/O
1
SI/P52
0
SO/P51
SCK/P50
UART
1
RxD/P53
8
TxD/P54
Pseudo 3-wire serial I/O
2
P05 (serial clock input)
12
P06 (serial data output)
P07 (serial data input)
P95/S7 (serial clock input)
13
P96/S6 (serial data output)
P97/S5 (serial data input)
Cautions 1. Be sure to select the number of V
PP
pulses shown in Table 22-3 for the transmission method.
2. If performing write operations to flash memory with the UART transmission method, set the
main system clock oscillation frequency to 4.19 MHz or higher.
Figure 22-2. Transmission Method Selection Format
10 V
V
PP
RESET
V
DD
V
SS
V
DD
V
SS
V
PP
pulses
Flash write mode
Содержание mPD780973 Series
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