ON Semiconductor ADT7476AARQZ-R Manual page 58

Table 66. T
RANGE
Register Address
0x5F
0x60
0x61
Bit No. Name
[2:0] FREQ
[3] HF/LR
[7:4] RANGE
1. These registers become read-only when the Configuration Register 1 Lock bit is set. Any further attempts to write to these registers have
no effect.
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/PWM FREQUENCY REGISTERS
R/W
R/W Remote 1 T
R/W Local T
RANGE
R/W Remote 2 T
R/W
R/W These bits control the PWMx frequency (only apply when PWM channel is in low frequency
mode).
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
R/W HF/LF = 1, High Frequency PWM Mode is Enabled for PWMx
HF/LF = 0, Low Frequency PWM Mode is Enabled for PWMx.
R/W These bits determine the PWM duty cycle vs. the temperature range 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
ADT7476A
(Note 1)
Description
/PWM1 Frequency
RANGE
/PWM2 Frequency
/PWM3 Frequency
RANGE
Description
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58
Power-On Default
0xC4
0xC4
0xC4