ADM1026
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
GPIO16/THERM
A
IN0
(0V – 3V)
A
IN1
(0V – 3V)
A
IN2
(0V – 3V)
39
A
IN3
(0V – 3V)
38
GPIO10
GPIO11
GPIO12
GPIO13
GPIO14
48
47
46
45
44
43
GPIO15
42
41
40
37
A
IN4
(0V – 3V)
36
A
IN5
(0V – 3V)
35
A
IN6
(0V – 2.5V)
34
A
IN7
(0V – 2.5V)
33
+V
CCP
32
+12 V
IN
31
–12 V
IN
30
+5 V
IN
29
V
BAT
28
D2+/A
IN8
(0V – 2.5V)
27
D2–/A
IN9
(0V – 2.5V)
26
D1+
25
D1–/NTESTIN
GPIO9
1
GPIO8
2
FAN0/GPIO0
3
PIN 1 IDENTIFIER
FAN1/GPIO1
4
FAN2/GPIO2
5
FAN3/GPIO3
6
3.3V MAIN
7
DGND
8
FAN4/GPIO4
9
FAN5/GPIO5
10
FAN6/GPIO6
11
FAN7/GPIO7
12
ADM1026
TOP VIEW
(Not to Scale)
SCL
13
SDA
14
ADD/NTESTOUT
15
CI
16
INT
17
PWM
18
RESETSTBY
19
RESETMAIN
20
AGND
21
3.3V STBY
22
DAC
23
V
REF
24
Figure 3. Pin Configuration
Table 3.
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Mnemonic
GPIO9
GPIO8
FAN0/GPIO0
FAN1/GPIO1
FAN2/GPIO2
FAN3/GPIO3
3.3 V MAIN
DGND
FAN4/GPIO4
FAN5/GPIO5
FAN6/GPIO6
FAN7/GPIO7
SCL
SDA
ADD/NTESTOUT
CI
Type
Digital I/O
Digital I/O
Digital I/O
Digital I/O
Digital I/O
Digital I/O
Analog Input
Ground
Digital I/O
Digital I/O
Digital I/O
Digital I/O
Digital Input
Digital I/O
Digital Input
Digital Input
Description
General-purpose I/O pin that can be configured as digital inputs or outputs.
General-purpose I/O pin that can be configured as digital inputs or outputs.
Fan tachometer input with internal 10 kΩ pull-up resistor to 3.3 V STBY. Can be
reconfigured as a general-purpose, open drain, digital I/O pin.
Fan tachometer input with internal 10 kΩ pull-up resistor to 3.3 V STBY. Can be
reconfigured as a general-purpose, open drain, digital I/O pin.
Fan tachometer input with internal 10 kΩ pull-up resistor to 3.3 V STBY. Can be
reconfigured as a general-purpose, open drain, digital I/O pin.
Fan tachometer input with internal 10 kΩ pull-up resistor to 3.3 V STBY. Can be
reconfigured as a general-purpose, open drain, digital I/O pin.
Monitors the main 3.3 V system supply. Does not power the device.
Ground pin for digital circuits.
Fan tachometer input with internal 10 kΩ pull-up resistor to 3.3 V STBY. Can be
reconfigured as a general-purpose, open drain, digital I/O pin.
Fan tachometer input with internal 10 kΩ pull-up resistor to 3.3 V STBY. Can be
reconfigured as a general-purpose, open drain, digital I/O pin.
Fan tachometer input with internal 10 kΩ pull-up resistor to 3.3 V STBY. Can be
reconfigured as a general-purpose, open drain, digital I/O pin.
Fan tachometer input with internal 10 kΩ pull-up resistor to 3.3 V STBY. Can be
reconfigured as a general-purpose, open drain, digital I/O pin.
Open Drain Serial Bus Clock. Requires a 2.2 kΩ pull-up resistor.
Serial Bus Data. Open drain I/O. Requires a 2.2 kΩ pull-up resistor.
This is a three-state input that controls the two LSBs of the serial bus address. It also
functions as the output for NAND tree testing.
An active high input that captures a chassis intrusion event in Bit 6 of Status Register 4.
This bit remains set until cleared, as long as battery voltage is applied to the V
BAT
input,
even when the ADM1026 is powered off.
Interrupt Request (Open Drain). The output is enabled when Bit 1 of the configuration
register is set to 1. The default state is disabled. It has an on-chip 100 kΩ pull-up resistor.
Rev. A | Page 6 of 56
17
INT
Digital Output
02657-A-003
AD [ ANALOG DEVICES ]
