ADT7462ACPZ-R7 datasheet(70/81 Pages) ONSEMI

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ADT7462

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Table 60. Register 0x26 — PWM3, PWM4 Frequency (Note 1)

Bit

Name

R/W

Description

Min 3

R/W

When the ADT7462 is in automatic fan control mode, this bit defines whether PWM3 is off

(0% duty cycle) or at minimum PWM3 duty cycle when the controlling temperature is below its

TMIN − hysteresis value.

0 = 0% duty cycle below TMIN − hysteresis (default); 1 = minimum PWM3 duty cycle below

TMIN − hysteresis.

Min 4

R/W

When the ADT7462 is in automatic fan control mode, this bit defines whether PWM4 is off

(0% duty cycle) or at minimum PWM4 duty cycle when the controlling temperature is below its

TMIN − hysteresis value.

0 = 0% duty cycle below TMIN − hysteresis (default); 1 = minimum PWM4 duty cycle below

TMIN − hysteresis.

[4:2]

Low Freq 3

R/W

These bits set the frequency of PWM3 when configured in low frequency mode.

000 = 11 Hz

001 = 14.7 Hz

010 = 22.1 Hz

011 = 29.4 Hz

100 = 35.3 Hz (default)

101 = 44.1 Hz

110 = 58.8 Hz

111 = 88.2 Hz

[7:5]

Low Freq 4

R/W

These bits set the frequency of PWM4 when configured in low frequency mode.

000 = 11 Hz

001 = 14.7 Hz

010 = 22.1 Hz

011 = 29.4 Hz

100 = 35.3 Hz (default)

101 = 44.1 Hz

110 = 58.8 Hz

111 = 88.2 Hz

1. POR = 0x90, Lock = Y, SW Reset = Y.

Table 61. Minimum PWMx Duty Cycle (Note 1)

R/W

Description

POR Default

0x28

R/W

Minimum PWM1 duty cycle

0x80

0x29

R/W

Minimum PWM2 duty cycle

0x80

0x2A

R/W

Minimum PWM3 duty cycle

0x80

0x2B

R/W

Minimum PWM4 duty cycle

0x80

1. Lock = Y, SW Reset = Y.

Table 62. Register 0x2C — Maximum PWM Duty Cycle (Note 1)

Bit

Name

R/W

Description

[7:0]

Maximum PWM

Duty Cycle

R/W

This register sets the maximum % duty cycle output in automatic fan speed control mode for all

four PWM outputs.

1. POR = 0xC0, Lock = Y, SW Reset = Y.

Table 63. Register 0x30 — Thermal Mask Register 1 (Note 1)

Bit

Name

R/W

Description

Reserved

R/W

Reserved for future use.

Local Temp

R/W

1 masks ALERTs for an out−of−limit condition on the local temperature channel.

Remote 1 Temp

R/W

1 masks ALERTs for an out−of−limit condition on the Remote 1 temperature channel.

Remote 2 Temp

R/W

1 masks ALERTs for an out−of−limit condition on the Remote 2 temperature channel.

Remote 3 Temp

R/W

1 masks ALERTs for an out−of−limit condition on the Remote 3 temperature channel.

Diode 1 Error

R/W

1 masks ALERTs for an open or short condition on the Remote 1 channel.

Diode 2 Error

R/W

1 masks ALERTs for an open or short condition on the Remote 2 channel.

Diode 3 Error

R/W

1 masks ALERTs for an open or short condition on the Remote 3 channel.

1. POR = 0x00, Lock = N, SW Reset = Y.

ADT7462ACPZ-R7 Datasheet(PDF) 70 Page - ON Semiconductor

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