DS_6618_005
78M6618 Data Sheet
5 I/O Equivalent Circuits
V3P3D
V3P3A
V3P3D
110K
from
internal
reference
LCD SEG
Output
Pin
VREF
Pin
LCD
Driver
Digital
CMOS
Input
Input
Pin
GNDD
GNDA
GNDD
LCD Output Equivalent Circuit
Type 5:
LCD SEG or
pin configured as LCD SEG
VREF Equivalent Circuit
Type 9:
VREF
Digital Input Equivalent Circuit
Type 1:
Standard Digital Input or
pin configured as DIO Input
with Internal Pull-Up
V3P3A
V3P3D
V3P3D
Analog
from
internal
reference
V2P5
Pin
To
Input
MUX
Pin
Digital
CMOS
Input
Input
Pin
GNDA
GNDD
110K
GNDD
GNDD
Analog Input Equivalent Circuit
V2P5 Equivalent Circuit
Type 10:
Type 6
:
ADC Input
V2P5
Digital Input
Type 2:
Pin configured as DIO Input
with Internal Pull-Down
V3P3A
Comparator
Input
V3P3D
To
VLCD
Pin
LCD
Drivers
Comparator
Pin
GNDA
GNDD
Digital
Input
Pin
CMOS
Input
Comparator Input Equivalent
Circuit Type 7:
VLCD Equivalent Circuit
Type 11:
Comparator Input
VLCD Power
GNDD
Oscillator
Pin
To
Oscillator
Power
Down
Circuits
VBAT
Pin
Digital Input Type 3:
Standard Digital Input or
pin configured as DIO Input
GNDD
GNDD
V3P3D
V3P3D
Oscillator Equivalent Circuit
Type 8:
VBAT Equivalent Circuit
Type 12:
Oscillator I/O
VBAT Power
10
40
from
V3P3SYS
Digital
Output
Pin
CMOS
Output
V3P3D
Pin
GNDD
GNDD
from
VBAT
Digital Output Equivalent Circuit
Type 4:
V3P3D Equivalent Circuit
Type 13:
Standard Digital Output or
pin configured as DIO Output
V3P3D
Figure 9: I/O Equivalent Circuits
Rev. 1.4
29
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
