EVAL-ADM1026EB datasheet(38/56 Pages) AD

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ADM1026

Rev. A | Page 38 of 56

Hex

Address

Name

Power-On Value

Description

AIN0 Low Limit

00h

Low limit for AIN0 measurement

AIN1 Low Limit

00h

Low limit for AIN1 measurement

AIN2 Low Limit

00h

Low limit for AIN2 measurement

AIN3 Low Limit

00h

Low limit for AIN3 measurement

AIN4 Low Limit

00h

Low limit for AIN4 measurement

AIN5 Low Limit

00h

Low limit for AIN5 measurement

AIN6 Low Limit

00h

Low limit for AIN6 measurement

AIN7 Low Limit

00h

Low limit for AIN7 measurement

FAN0 High Limit

FFh

High limit for Fan 0 speed measurement (no low limit)

FAN1 High Limit

FFh

High limit for Fan 1 speed measurement (no low limit)

FAN2 High Limit

FFh

High limit for Fan 2 speed measurement (no low limit)

FAN3 High Limit

FFh

High limit for Fan 3 speed measurement (no low limit)

FAN4 High Limit

FFh

High limit for Fan 4 speed measurement (no low limit)

FAN5 High Limit

FFh

High limit for Fan 5 speed measurement (no low limit)

FAN6 High Limit

FFh

High limit for Fan 6 speed measurement (no low limit)

FAN7 High Limit

FFh

High limit for Fan 7 speed measurement (no low limit)

Int. Temp. High Limit

50h (80°C)

High limit for local temperature measurement

Int. Temp. Low Limit

80h

Low limit for local temperature measurement

VBAT High Limit

FFh

High limit for VBAT measurement

VBAT Low Limit

00h

Low limit for VBAT measurement

AIN8 High Limit

FFh

High limit for AIN8 measurement

AIN8 Low Limit

00h

Low limit for AIN8 measurement

Ext1 Temp Offset

00h

Offset register for Remote Temperature Channel 1

Ext2 Temp Offset

00h

Offset register for Remote Temperature Channel 2

DETAILED REGISTER DESCRIPTIONS

Table 13. Register 00h, Configuration Register 1 (Power-On Default 00h)

Bit

Name

R/W

Description

Monitor = 0

R/W

When this bit is set the ADM1026 monitors all voltage, temperature and fan channels in a round

robin manner.

Int Enable = 0

R/W

When this bit is set, the INT output pin is enabled.

Int Clear = 0

R/W

Setting this bit clears an interrupt from the voltage, temperature or fan speed channels. Because

GPIO interrupts are level triggered, this bit has no effect on interrupts originating from GPIO

channels. This bit is cleared by writing a 0 to it. If in monitoring mode voltages, temperatures and

fan speeds continue to be monitored after writing to this bit to clear an interrupt, so an interrupt

may be set again on the next monitoring cycle.

Enable Voltage/Ext2 = 0

R/W

When this bit is 1, the ADM1026 monitors voltage (AIN8 and AIN9) on Pins 28 and 27, respectively.

When this bit is 0, the ADM1026 monitors a second thermal diode temperature channel, D2, on

these pins. If the second thermal diode channel is not being used, it is recommended that the bit

be set to 1.

Enable THERM = 0

R/W

When this bit is 1, the THERM pin (Pin 42) is asserted (go low) if any of the THERM limits are

exceeded. If THERM is pulled low as an input, the DAC and PWM outputs are forced to full scale

until THERM is taken high.

Enable DAC AFC = 0

R/W

When this bit is 1, the DAC output is enabled for automatic fan speed control (AFC) based on

temperature. When this bit is 0, the DAC Output reflects the value in Reg 04h, the DAC Control

Enable PWM AFC = 0

R/W

When this bit is 1, the PWM output is enabled for automatic fan speed control (AFC) based on

temperature. When this bit is 0, the PWM Output reflects the value in Reg 05h, the PWM Control

Software Reset = 0

R/W

Writing a 1 to this bit restores all registers to the power-on defaults. This bit is cleared by writing a

0 to it. For more info, see the Software Reset Function section.

EVAL-ADM1026EB Datasheet(PDF) 38 Page - Analog Devices

EVAL-ADM1026EB Datasheet(HTML) 38 Page - Analog Devices

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