UPD78F0034A NEC, UPD78F0034A Datasheet - Page 21

• Manufacturer Part Number: UPD78F0034A
• Description: 8 Bit Single Chip Microcontroller
• Manufacturer: NEC

w w w . d a t a s h e e t 4 u . c o m
Caution Be sure to select a communication mode using the number of V
3-wire serial I/O
I
UART
Pseudo 3-wire serial I/O
2
C bus
Communication Mode
RESET
V
PP
Table 6-2. List of Communication Mode ( µ PD78F0034AY)
Figure 6-1. Format of Communication Mode Selection
10 V
V
V
V
V
DD
SS
DD
SS
1
1
1
1
Channels
Data Sheet U14040EJ4V0DS
1
SI30/P20
SO30/P21
SCK30/P22
SDA0/P32
SCL0/P33
RxD0/P23
TxD0/P24
P72/TI50/TO50
(serial clock input)
P71/TI01
(serial data output)
P70/TI00/TO0
(serial data input)
Flash write mode
2
V
PP
Pin Used
pulses
µ PD78F0034A, 78F0034AY
PP
n
pulses shown in Table 6-2.
0
4
8
12
V
PP
Pulses
21