ADT7467ARQZ-R7 datasheet(68/77 Pages) ONSEMI

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ADT7467

Rev. 3 | Page 68 of 77 | www.onsemi.com

Table 35. TRANGE/PWM Frequency Registers

R/W1

Description

Power-On Default

0x5F

Read/write

Remote 1 TRANGE/PWM1 frequency.

0xC4

0x60

Read/write

Local TRANGE/PWM2 frequency.

0xC4

0x61

Read/write

Remote 2 TRANGE/PWM3 frequency.

0xC4

1 These registers become read-only registers when the Configuration Register 1 LOCK bit is set to 1. Any subsequent attempts to write to these registers fail.

Table 36. Register 0x5F, Register 0x60, and Register 0x61—Remote 1, Local, and Remote 2 TRANGE/PWMx Frequency Registers

(Power-On Default = 0xC4)

Bit

Name

R/W1

Description

<2:0>

FREQ

Read/write

These bits control the PWMx frequency.

000 = 11.0 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

<3>

THRM

Read/write

THRM = 1 causes the THERM pin (Pin 9) to assert low as an output when this temperature channel’s THERM

limit is exceeded by 0.25°C. The THERM pin remains asserted until the temperature is equal to or below the

THERM limit. The minimum time that THERM asserts is one monitoring cycle. This allows clock modulation

of devices that incorporate this feature.

THRM = 0 makes the THERM pin act as an input when Pin 9 is configured as THERM, for example, for

Pentium 4 PROCHOT monitoring.

<7:4>

RANGE

Read/write

These bits determine the PWM duty cycle vs. the temperature slope for automatic fan control.

0000 = 2°C

0001 = 2.5°C

0010 = 3.33°C

0011 = 4°C

0100 = 5°C

0101 = 6.67°C

0110 = 8°C

0111 = 10°C

1000 = 13.33°C

1001 = 16°C

1010 = 20°C

1011 = 26.67°C

1100 = 32°C (default)

1101 = 40°C

1110 = 53.33°C

1111 = 80°C

1 These registers become read-only registers when the Configuration Register 1 LOCK bit is set to 1. Any subsequent attempts to write to these registers fail.

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