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ADM1025AARQ Folha de dados(PDF) 4 Page - Analog Devices

Nome de Peças ADM1025AARQ
Descrição Electrónicos  Low-Cost PC Hardware Monitor ASIC
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Fabricante Electrônico  AD [Analog Devices]
Página de início  http://www.analog.com
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ADM1025AARQ Folha de dados(HTML) 4 Page - Analog Devices

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REV. A
ADM1025/ADM1025A
–4–
PIN FUNCTION DESCRIPTIONS
Pin
No.
Mnemonic
Description
1
SDA
Digital I/O. Serial bus bidirectional data. Open-drain output.
2
SCL
Digital Input. Serial bus clock.
3
GND
System Ground.
4VCC
Power. Can be powered by +3.3 V standby power if monitoring in low power states is required.
This pin also serves as the analog input to monitor VCC.
5
VID0
Digital Input. Core voltage ID readouts from the processor. This value is read into the VID0–VID3
Status Register. It has an on-chip 100 k
Ω pull-up resistor (ADM1025 only).
6
VID1
Digital Input. Core voltage ID readouts from the processor. This value is read into the VID0–VID3
Status Register. It has an on-chip 100 k
Ω pull-up resistor (ADM1025 only).
7
VID2
Digital Input. Core voltage ID readouts from the processor. This value is read into the VID0–VID3
Status Register. It has an on-chip 100 k
Ω pull-up resistor (ADM1025 only).
8
VID3
Digital Input. Core voltage ID readouts from the processor. This value is read into the VID0–VID3
Status Register. It has an on-chip 100 k
Ω pull-up resistor (ADM1025 only).
9
D–/NTI
Analog/Digital Input. Connected to cathode of external temperature sensing diode. If held high at
power-up, initiates NAND tree test mode.
10
D+
Analog Input. Connected to anode of external temperature sensing diode.
11
12 VIN/VID4
Programmable Analog/Digital Input. Defaults to 12 VIN analog input at power-up, but may be pro-
grammed as VID4 Core Voltage ID readout from the processor. This value is read into the VID4
Status Register. In analog 12 VIN mode it has an on-chip voltage attenuator. In VID4 mode it has an
on-chip 300 k
Ω pull-up resistor.
12
5 VIN
Analog Input. Monitors 5 V supply.
13
3.3 VIN
Analog Input. Monitors 3.3 V supply.
14
2.5 VIN
Analog Input. Monitors 2.5 V supply.
15
VCCPIN
Analog Input. Monitors processor core voltage (0 V to 3.0 V).
16
ADD/
RST/INT/NTO
Programmable Digital I/O. The lowest order programmable bit of the SMBus Address, sampled on
SMB activity as a three-state input. Can also be configured to give a minimum 20 ms low reset
output pulse. Alternatively, can be programmed as an interrupt output for temperature/voltage
interrupts. Functions as the output of the NAND tree in NAND tree test mode.
PIN CONFIGURATION
TOP VIEW
(Not to Scale)
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
SDA
ADD/
RST/INT/NTO
ADM1025/
ADM1025A
SCL
VCCPIN
GND
2.5VIN
VCC
3.3VIN
VID0
5VIN
VID1
12VIN/VID4
VID2
D+
VID3
D–/NTI


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