EVAL-ADM1026EB datasheet(36/56 Pages) AD

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ADM1026

Rev. A | Page 36 of 56

REGISTERS

Table 11. Address Pointer Register

Bit

Name

R/W

Description

7–0

Address Pointer

Write

Address of ADM1026 registers. See the following tables for details.

Table 12. List of Registers

Hex

Address

Name

Power-On Value

Description

Configuration 1

00h

Configures various operating parameters

Configuration 2

00h

Configures Pins 3–6 and 9–12 as fan inputs or GPIO

Fan 0–3 Divisor

55h

Sets oscillator frequency for Fan 0–3 speed measurement

Fan 4–7 Divisor

55h

Sets oscillator frequency for Fan 4–7 speed measurement

DAC Control

FFh

Contains value for fan speed DAC (analog fan speed control) or minimum

value for automatic fan speed control

PWM Control

FFh

Contains value for PWM fan speed control or minimum value for automatic

fan speed control

EEPROM Register

100h

For factory use only

Configuration Register

300h

Configuration register for THERM, VREF and GPIO16

GPIO Config 1

00h

Configures GPIO0 to GPIO3 as input or output and as active high or active low

GPIO Config 2

00h

Configures GPIO4 to GPIO7 as input or output and as active high or active low

GPIO Config 3

00h

Configures GPIO8 to GPIO11 as input or output and as active high or active

low

GPIO Config 4

00h

Configures GPIO12 to GPIO15 as input or output and as active high or active

low

EEPROM Register 2

00h

For factory use only

Int Temp THERM Limit

37h (55°C)

High limit for THERM interrupt output based on internal temperature

measurement

TDM1 THERM Limit

50h (80°C)

High limit for THERM interrupt output based on Remote Channel 1 (D1)

temperature measurement

TDM2 THERM Limit

50h (80°C)

High limit for THERM interrupt output based on Remote Channel 2 (D2)

temperature measurement

Int Temp TMIN

28h (40°C)

TMIN value for automatic fan speed control based on internal temperature

measurement

TDM1 TMIN

40h (64°C)

TMIN value for automatic fan speed control based on Remote Channel 1 (D1)

temperature measurement

TDM2 TMIN

40h (64°C)

TMIN value for automatic fan speed control based on Remote Channel 2 (D2)

temperature measurement

EEPROM Register 3

00h

Configures EEPROM for read/write/erase, etc.

Test Register 1

00h

Manufacturer’s test register

Test Register 2

00h

For manufacturer’s use only

Manufacturer’s ID

41h

Contains manufacturer’s ID code

Revision

4xh

Contains code for major and minor revisions

Mask Register 1

00h

Interrupt mask register for temperature and supply voltage faults

Mask Register 2

00h

Interrupt mask register for analog input faults

Mask Register 3

00h

Interrupt mask register for fan faults

Mask Register 4

00h

Interrupt mask register for local temp, VBAT, AIN8, THERM, AFC, CI and GPIO16

Mask Register 5

00h

Interrupt mask register for GPIO0 to GPIO7

Mask Register 6

00h

Interrupt mask register for GPIO8 to GPIO15

Int Temp Offset

00h

Offset register for internal temperature measurement

Int Temp Value

00h

Measured temperature from on–chip sensor

Status Register 1

00h

Interrupt status register for external temp and supply voltage faults

Status Register 2

00h

Interrupt status register for analog input faults

Status Register 3

00h

Interrupt status register for fan faults

Status Register 4

00h

Interrupt status register for local temp, VBAT, AIN8, THERM, AFC, CI, and GPIO16

EVAL-ADM1026EB Datasheet(PDF) 36 Page - Analog Devices

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