ADT7476
Table 66. T RANGE /PWM FREQUENCY REGISTERS (Note 1)
Register Address
0x5F
0x60
0x61
R/W
R/W
R/W
R/W
Description
Remote 1 T RANGE /PWM1 Frequency
Local T RANGE /PWM2 Frequency
Remote 2 T RANGE /PWM3 Frequency
Power-On Default
0xC4
0xC4
0xC4
Bit No.
[2:0]
Name
FREQ
R/W
R/W
Description
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
[3]
[7:4]
HF/LR
RANGE
R/W
R/W
HF/LF = 1, High frequency PWM mode is enabled for PWMx.
HF/LF = 0, Low frequency PWM mode is enabled for PWMx.
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
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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