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| 型號(hào)： | ADM1026 |
| 廠(chǎng)商： | Analog Devices, Inc. |
| 英文描述： | Complete Thermal and System Management Controller |
| 中文描述： | 完整的熱和系統(tǒng)管理控制器 |
| 文件頁(yè)數(shù)： | 7/56頁(yè) |
| 文件大小： | 634K |
| 代理商： | ADM1026 |
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ADM1026
Rev. A | Page 7 of 56
Pin No.
18
Mnemonic
PWM
Type
Digital Output
Description
Open drain pulse width modulated output for control of the fan speed. This pin defaults
to high for the 100% duty cycle for use with NMOS drive circuitry. If a PMOS device is used
to drive the fan, the PWM output may be inverted by setting Bit 1 of Test Register 1 = 1.
Power-On Reset. 5 mA driver (weak 100 k pull-up), active low output (100 k pull-up)
with a 180 ms typical pulse width. RESETSTBY is asserted whenever 3.3 V STBY is below
the reset threshold. It remains asserted for approximately 180 ms after 3.3 V STBY rises
above the reset threshold.
Power-On Reset. 5 mA driver (weak 100 k pull-up), active low output (100 k pull-up)
with a 180 ms typical pulse width. RESETMAIN is asserted whenever 3.3 V MAIN is below
the reset threshold. It remains asserted for approximately 180 ms after 3.3 V MAIN rises
above the reset threshold. If, however, 3.3 V STBY rises with or before 3.3 V MAIN, then
RESETMAIN remains asserted for 180 ms after RESETSTBY is deasserted. Pin 20 also
functions as an active low RESET input.
Ground pin for analog circuits.
Supplies 3.3 V power. Also monitors the 3.3 V standby power rail.
Analog Output 0 V to 2.5 V output for analog control of the fan speed.
Analog Output Reference Voltage Output. Can be selected as 1.8 V (default) or 2.5 V.
Analog Input
Connected to a cathode of the first remote temperature sensing diode. If it is held high at
power-on, it activates the NAND tree test mode.
Analog Input
Connected to the anode of the first remote temperature sensing diode.
Programmable Connected to the cathode of the second remote temperature sensing diode, or the
analog input may be reconfigured as a 0 V 2.5 V analog input.
Programmable Connected to the anode of the second remote temperature sensing diode, or the analog
input may be reconfigured as a 0 V 2.5 V analog input.
Analog Input
Monitors battery voltage, nominally +3 V.
Analog Input
Monitors the +5 V supply.
Analog Input
Monitors the
12 V supply.
Analog Input
Monitors the +12 V supply.
Analog Input
Monitors the processor core voltage (0 V to 3.0 V).
Analog Input
General-purpose 0 V to 2.5 V analog inputs.
Analog Input
General-purpose 0 V to 2.5 V analog inputs.
Analog Input
General-purpose 0 V to 3 V analog inputs.
Analog Input
General-purpose 0 V to 3 V analog inputs.
Analog Input
General-purpose 0 V to 3 V analog inputs.
Analog Input
General-purpose 0 V to 3 V analog inputs.
Analog Input
General-purpose 0 V to 3 V analog inputs.
Analog Input
General-purpose 0 V to 3 V analog inputs.
Digital I/O
1
General-purpose I/O pin that can be configured as a digital input or output. Can also be
configured as a bidirectional THERM pin (100 k pull-up).
Digital I/O
1
General-purpose I/O pin that can be configured as a digital input or output.
Digital I/O
1
General-purpose I/O pin that can be configured as a digital input or output.
Digital I/O
1
General-purpose I/O pin that can be configured as a digital input or output.
Digital I/O
1
General-purpose I/O pin that can be configured as a digital input or output.
Digital I/O
1
General-purpose I/O pin that can be configured as a digital input or output.
Digital I/O
1
General-purpose I/O pin that can be configured as a digital input or output.
19
RESETSTBY
Digital Output
20
RESETMAIN
Digital I/O
21
22
23
24
25
AGND
3.3 V STBY
DAC
V
REF
D1–/NTESTIN
Ground
Power Supply
26
27
D1+
D2–/A
IN9
28
D2+/A
IN8
29
30
31
32
33
34
35
36
37
38
39
40
41
42
V
BAT
+5 V
IN
12 V
IN
+12 V
IN
+V
CCP
A
IN7
A
IN6
A
IN5
A
IN4
A
IN3
A
IN2
A
IN1
A
IN0
GPIO16/THERM
43
44
45
46
47
48
GPIO15
GPIO14
GPIO13
GPIO12
GPIO11
GPIO10
1
GPIO pins are open drain and require external pull-up resistors. Fan inputs have integrated 10 k pull-ups, but these pins become open drain when reconfigured as
GPIOs.
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