71M6543F Maxim, 71M6543F Datasheet - Page 150
71M6543F
Manufacturer Part Number
71M6543F
Description
The 71M6543F/71M6543H are Teridian's 4th-generation polyphase metering system-on-chips (SoCs) with a 5MHz, 8051-compatible MPU core, low-power real-time clock (RTC) with digital temperature compensation, flash memory, and LCD driver
Manufacturer
Maxim
Datasheet
1.71M6543F.pdf
(157 pages)
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71M6543F/H and 71M6543G/GH Data Sheet
6.8
6.8.1 71M6543 Power and Ground Pins
Pin types: P = Power, O = Output, I = Input, I/O = Input/Output. The circuit number denotes the equivalent
circuit, as specified under Section
150
72, 80
Pin
62
85
69
61
60
89
70
71
71M6543 Pin Descriptions
VBAT_RTC
V3P3SYS
V3P3D
V3P3A
GNDD
GNDA
Name
VLCD
VBAT
VDD
Type
O
O
O
P
P
P
P
P
P
© 2008–2011 Teridian Semiconductor Corporation
Table 112: 71M6543 Power and Ground Pins
Circuit
6.8.4 I/O Equivalent Circuits.
—
—
—
—
13
—
—
12
12
Analog Ground. This pin should be connected directly to the
ground plane.
Digital Ground. This pin should be connected directly to the
ground plane.
Analog Power Supply. A 3.3 V power supply should be
connected to this pin. V3P3A must be the same voltage as
V3P3SYS.
System 3.3 V Supply. This pin should be connected to a 3.3 V
power supply.
Auxiliary Voltage Output of the Chip. In mission mode, this
pin is connected to V3P3SYS by the internal selection switch.
In BRN mode, it is internally connected to VBAT. V3P3D is
floating in LCD and sleep mode. A bypass capacitor to ground
should not exceed 0.1 µF.
Output of the 2.5 V Regulator. This pin is powered in MSN and
BRN modes. A 0.1 µF bypass capacitor to ground should be
connected to this pin.
Output of the LCD DAC. A 0.1 µF bypass capacitor to ground
should be connected to this pin.
Battery Backup Pin to Support the Battery Modes (BRN, LCD).
A battery or super capacitor is to be connected between VBAT
and GNDD. If no battery is used, connect VBAT to V3P3SYS.
RTC and Oscillator Power Supply. A battery or super-capacitor
is to be connected between VBAT and GNDD. If no battery is
used, connect VBAT_RTC to V3P3SYS.
Function
v1.2
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