User`s manual

23
User system
interface cable
P20, P22 to P27
MCU
VHCT125
VHC125
Vcc
47 kΩ
CB3Q3306
P20, P22 to P27
User system
interface cable
P21
MCU
VHCT125
VHC125
Vcc
47 kΩ
CB3Q3306
P21
CBTS3306
SUB MCU
P21
Figure 3.2 User System Interface Circuits (4)