ADT7462 Datasheet, PDF (77/92 Pages) Analog Devices – Flexible Temperature and Voltage Monitor and System Fan Controller

ADT7462
Table 61. PWM Configuration Registers¹
Register
Address
R/W Description
0x21
R/W PWM1 Configuration Register
0x22
R/W PWM2 Configuration Register
0x23
R/W PWM3 Configuration Register
0x24
R/W PWM4 Configuration Register
Bit
Name
[2:0]
Spin-Up Timeout
Power On
Default
0x11
0x31
0x51
0x71
R/W
R/W
3
SLOW
R/W
4
INV
R/W
[7:5]
BHVR
R/W
1 _{Lock = Y, SW Reset = Y.}
Description
These bits set the duration of the fan start-up timeout and the
timeout for the fan freewheeling test.
000 = no start-up timeout
001 = 100 ms
010 = 250 ms
011 = 400 ms
100 = 667 ms
101 = 1 sec
110 = 2 sec
111 = 32 sec
Setting this bit to 1 makes the ramp rate of the enhance
acoustics mode 4 times longer.
Setting this bit to 0, the PWM outputs are active high
Setting this bit to 1, the PWM outputs are active low.
These bits determine which temperature channel controls the
fans in the automatic fan speed control loop.
000 = local temperature
001 = Remote 1 temperature
010 = Remote 2 temperature
011 = Remote 3 temperature
100 = off
101 = maximum fan speed calculated by the local and Remote 3
temperature channels.
110 = maximum fan speed calculated by all 4 channels.
111 = manual mode.
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