ADM1027ARQZ-RL71 ONSEMI [ON Semiconductor], ADM1027ARQZ-RL71 Datasheet - Page 54

• Manufacturer Part Number: ADM1027ARQZ-RL71
• Manufacturer: ONSEMI [ON Semiconductor]

ADM1027
Bit
<0>
<1>
<2>
<3>
<4>
<5>
<6>
<7>
This register becomes read-only when the Configuration Register 1 lock bit is set to 1. Any further attempts to write to this register
will have no effect.
Bit
<1:0>
<3:2>
<5:4>
<7:6>
Name
ALERT
Reserved
Reserved
FAST
DC1
DC2
DC3
DC4
Name
FAN1
FAN2
FAN3
FAN4
Table XXXIV. Register 0x7B – Fan Pulses Per Revolution Register (Power On Default = 0x55)
Table XXXIII. Register 0x78 – Configuration Register 3 (Power-On Default = 0x00)
R/W
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
R/W
Read/Write
Read/Write
Read/Write
Read/Write
Description
ALERT = 1, Pin 10 (PWM2/SMBALERT) is configured as an SMBALERT interrupt
output to indicate out-of-limit error conditions. Default = 0 = PWM2.
Reserved for future use.
Reserved for future use.
FAST = 1 enables fast TACH measurements on all channels. This increases the
TACH measurement rate from once per second, to once per 250 ms (4 ).
DC1 = 1 enables TACH measurements to be continuously made on TACH1.
DC2 = 2 enables TACH measurements to be continuously made on TACH2.
DC3 = 1 enables TACH measurements to be continuously made on TACH3.
DC4 = 1 enables TACH measurements to be continuously made on TACH4.
Description
Sets number of pulses to be counted when measuring FAN1 speed. Can be used to
determine fan’s pulses per revolution number for unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
Sets number of pulses to be counted when measuring FAN2 speed. Can be used to
determine fan’s pulses per revolution number for unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
Sets number of pulses to be counted when measuring FAN3 speed. Can be used to
determine fan’s pulses per revolution for unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
Sets number of pulses to be counted when measuring FAN4 speed. Can be used to
determine fan’s pulses per revolution for unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
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