71M6531D Datasheet, PDF (112/115 Pages) Teridian Semiconductor Corporation – Energy Meter IC

Data Sheet 71M6531D/F-71M6532D/F
5.9.4 I/O Equivalent Circuits
V3P3D
V3P3D
Digital
Input
Pin
110K
CMOS
Input
GNDD
Digital Input Equivalent Circuit
Type 1:
Standard Digital Input or
pin configured as DIO Input
with Internal Pull-Up
V3P3D
LCD
Driver
LCD SEG
Output
Pin
GNDD
LCD Output Equivalent Circuit
Type 5:
LCD SEG or
pin configured as LCD SEG
V3P3A
FDS 6531/6532 005
V3P3A
from
internal
reference
VREF
Pin
GNDA
VREF Equivalent Circuit
Type 9:
VREF
V3P3D
Digital
Input
Pin
GNDD
110K
GNDD
CMOS
Input
Digital Input
Type 2:
Pin configured as DIO Input
with Internal Pull-Down
V3P3D
Digital
Input
Pin
GNDD
CMOS
Input
Analog
Input
Pin
To
MUX
GNDA
Analog Input Equivalent Circuit
Type 6:
ADC Input
V3P3A
Comparator
Input
Pin
To
Comparator
GNDA
Comparator Input Equivalent
Circuit Type 7:
Comparator Input
from
internal
reference
V2P5
Pin
GNDD
V2P5 Equivalent Circuit
Type 10:
V2P5
VLCD
Pin
LCD
Drivers
GNDD
VLCD Equivalent Circuit
Type 11:
VLCD Power
Digital Input Type 3:
Standard Digital Input or
pin configured as DIO Input
V3P3D
V3P3D
CMOS
Output
Digital
Output
Pin
GNDD
GNDD
Digital Output Equivalent Circuit
Type 4:
Standard Digital Output or
pin configured as DIO Output
Oscillator
Pin
To
Oscillator
GNDD
Oscillator Equivalent Circuit
Type 8:
Oscillator I/O
10
from
V3P3SYS
40
from
VBAT
VBAT
Pin
Power
Down
Circuits
GNDD
VBAT Equivalent Circuit
Type 12:
VBAT Power
V3P3D
Pin
V3P3D Equivalent Circuit
Type 13:
V3P3D
Figure 51: I/O Equivalent Circuits
112
© 2005-2009 TERIDIAN Semiconductor Corporation
v1.2