ADT7467 Analog Devices, Inc., ADT7467 Datasheet - Page 75

• Manufacturer Part Number: ADT7467
• Description: Dbcool Remote Thermal Monitor And Fan Controller
• Manufacturer: Analog Devices, Inc.

Table 53. Register 0x7B—TACH Pulses per Revolution Register (Power-On Default = 0x55)
Bit
<1:0>
<3:2>
<5:4>
<7:6>
Table 54. Register 0x7C—Configuration Register 5 (Power-On Default = 0x00)
Bit
<0>
<1>
<2>
<3>
<4:7>
1
This register becomes a read-only register when the Configuration Register 1 lock bit is set to 1. Any subsequent attempts to write to this register fail.
Name
FAN1
FAN2
FAN3
FAN4
Name
2sC
HF/LF
GPIOD
GPIOP
RES
R/W
Read/write
Read/write
Read/write
Read/write
R/W
Read/write
1
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 programmed as an output, this bit determines
whether the GPIO is active low (0) or high (1).
Unused.
Description
Sets the number of pulses to be counted when measuring Fan 1 speed. Can be used to determine
fan pulses per revolution for an unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
Sets the number of pulses to be counted when measuring Fan 2 speed. Can be used to determine
fan pulses per revolution for an unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
Sets the number of pulses to be counted when measuring Fan 3 speed. Can be used to determine
fan pulses per revolution for an unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
Sets the number of pulses to be counted when measuring Fan 4 speed. Can be used to determine
fan pulses per revolution for an unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
Rev. A | Page 75 of 80
ADT7467