Analog Devices dBCool ADT7467 Manual page 75

Table 52. Register 0x7B—TACH Pulses per Revolution Register (Power-On Default = 0x55)
Bit Name R/W
<1:0> FAN1 Read/write
<3:2> FAN2 Read/write
<5:4> FAN3 Read/write
<7:6> FAN4 Read/write
Table 53. Register 0x7C—Configuration Register 5 (Power-On Default = 0x00)
1
Bit Name R/W
<0> 2sC Read/write
<1> HF/LF
<2> GPIOD
<3> GPIOP
<4:7> RES
1 This register becomes read-only when the Configuration Register 1 lock bit is set to 1. Any further attempts to write to this register have no effect.
Description
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
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
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
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
Description
2sC = 1, sets the temperature range to twos complement temperature range.
2sC = 0, changes the temperature range to Offset 64. When this bit is changed, the ADT7467
interprets all relevant temperature register values as defined by this bit.
Sets the PWM drive frequency to high frequency mode (0) or low frequency mode (1).
GPIO direction. When GPIO function is enabled, this determines whether the GPIO is an input (0) or an
output (1).
GPIO polarity. When the GPIO function is enabled and is programmed as an output, this bit
determines whether the GPIO is active low (0) or high (1).
Unused.
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ADT7467