ADT7468 Analog Devices, Inc., ADT7468 Datasheet - Page 79

• Manufacturer Part Number: ADT7468
• Description: Dbcool Remote Thermal Controller And Voltage Monitor
• Manufacturer: Analog Devices, Inc.

Table 54. Register 0x7B—TACH Pulses per Revolution Register (Power-On Default = 0x55)
Bit
<1:0>
<3:2>
<5:4>
<7:6>
Table 55. Register 0x7C—Configuration Register 5 (Power-On Default = 0x00)
Bit
<0>
<1>
<2>
<3>
<4:7>
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.
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 ADT7468
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.
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
Rev. A | Page 79 of 84
ADT7468