UPD78F9177 NEC, UPD78F9177 Datasheet - Page 16

• Manufacturer Part Number: UPD78F9177
• Description: 8-BIT SINGLE-CHIP MICROCONTROLLER
• Manufacturer: NEC

5. FLASH MEMORY PROGRAMMING
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.
5.1
mode from those listed in Table 5-1. To select a communication mode, the format shown in Figure 5-1 is used. Each
communication mode is selected by the number of V
16
The on-chip program memory in the PD78F9177 and PD78F9177Y is flash memory.
The flash memory can be written with the PD78F9177 and PD78F9177Y mounted on the target system (on-
Remark FL-PR3 is made by Naito Densei Machida Mfg. Co., Ltd.
The flash memory is written by using Flashpro III and by means of serial communication. Select a communication
Notes 1.
Caution Be sure to select a communication mode based on the V
RESET
Selecting Communication Mode
V
PP
2. Serial transfer is performed by controlling a port by software.
10 V
V
V
V
V
DD
DD
SS
SS
PD78F9177Y only
Communication Mode
3-wire serial I/O
SMB
UART
Pseudo 3-wire mode
Note1
Figure 5-1. Communication Mode Selection Format
Note2
Table 5-1. Communication Mode
Data Sheet U14022EJ1V0DS00
Pins Used
SCK20/ASCK20/P20
SO20/TxD20/P21
SI20/RxD20/P22
SCL0/P23
SDA0/P24
TxD20/SO20/P21
RxD20/SI20/P22
P00 (Serial clock input)
P01 (Serial data output)
P02 (Serial data input)
PP
pulses shown in Table 5-1.
1
PP
2
pulse number shown in Table 5-1.
Number of V
0
4
8
12
PD78F9177, 78F9177Y
PP
Pulses
n