ON Semiconductor ADT7476AARQZ-R Manual page 66

Table 85. REGISTER 0x7B − TACH PULSES PER REVOLUTION REGISTER (POWER-ON DEFAULT = 0x55)
Bit No. Mnemonic
[1:0] FAN1
[3:2] FAN2
[5:4] FAN3
[7:6] FAN4
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ADT7476A
R/W
R/W Sets number of pulses to be counted when measuring Fan 1 speed. Can be used to
determine fan pulses per revolution for unknown fan type.
Pulses Counted
00 = 1
01 = 2 (Default)
10 = 3
11 = 4
R/W Sets number of pulses to be counted when measuring Fan 2 speed. Can be used to
determine fan pulses per revolution for unknown fan type.
Pulses Counted
00 = 1
01 = 2 (Default)
10 = 3
11 = 4
R/W Sets number of pulses to be counted when measuring Fan 3 speed. Can be used to
determine fan pulses per revolution for unknown fan type.
Pulses Counted
00 = 1
01 = 2 (Default)
10 = 3
11 = 4
R/W Sets number of pulses to be counted when measuring Fan 4 speed. Can be used to
determine fan pulses per revolution for unknown fan type.
Pulses Counted
00 = 1
01 = 2 (Default)
10 = 3
11 = 4
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66