NEC uPD78F4225Y, Manual

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17
µ
PD78F4225Y
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
PP
pulses shown in Table 6-1.
Table 6-1. Communication Modes
Communication Mode Number of Channels Pins Used Number of V
PP
Pulses
3-wire serial I/O 3 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
I
2
C bus 1 SCL0/SCK0/P27 4
SDA0/SI0/P25
UART 2 TxD1/SO1/P21 8
RxD1/SI1/P20
TxD2/SO2/P71 9
RxD2/SI2/P70
Psendo-3-wire serial 1 P32/TO2 12
I/O
Note
(serial clock I/O)
P31/TO1
(serial data output)
P30/TO0
(serial data output)
Note Performs serial transfer by controlling port by software.
Caution Be sure to select a communication mode with the number of V
PP
pulses shown in Table 6-1.
Figure 6-1. Communication Mode Selecting Format
1 2 n
10 V
V
DD
V
SS
V
PP
V
DD
V
SS
RESET