参数资料
型号: 71M6541F-DB
厂商: Maxim Integrated Products
文件页数: 159/166页
文件大小: 0K
描述: DEMO BOARD 71M6541F
标准包装: 1
系列: *
71M6541D/F/G and 71M6542F/G Data Sheet
6.9
6.9.1
Pin Descriptions
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 6.9.4 I/O Equivalent Circuits .
.
Table 119: Power and Ground Pins
Pin
(64 pin)
50
42
Pin
(100-pin)
72, 80
62
Name
GNDA
GNDD
Type
P
P
Circuit
Description
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
53
85
V3P3A
P
connected to this pin. V3P3A must be the same
voltage as V3P3SYS.
45
69
V3P3SYS
P
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
41
61
V3P3D
O
13
selection switch. In BRN mode, it is internally
connected to VBAT. V3P3D is floating in LCD and
sleep mode. A 0.1 μF bypass capacitor to ground
must be connected to this pin.
The output of the 2.5V regulator. This pin is powered
40
60
VDD
O
in MSN and BRN modes. A 0.1 μF bypass capacitor to
ground should be connected to this pin.
57
89
VLCD
O
The 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,
46
70
VBAT
P
12
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-
47
71
VBAT_RTC
P
12
capacitor is to be connected between VBAT and
GNDD. If no battery is used, connect VBAT_RTC to
V3P3SYS.
Rev 4
159
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