ADT7468 Analog Devices, Inc., ADT7468 Datasheet - Page 72

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

ADT7468
Table 35. TEMP T
Register Address
0x5F
0x60
0x61
Bit
<2:0>
<3>
<7:4>
1
These registers become read-only when the Configuration Register 1 lock bit is set. Any further attempts to write to these registers have no effect.
Name
FREQ
THRM
RANGE
RANGE
/PWM Frequency Registers
R/W
Read/write
Read/write
Read/write
R/W
Read/write
Read/write
Read/write
1
Description
Remote 1 T
Local temperature T
Remote 2 T
Description
These bits control the PWMx frequency.
000 = 11.0 Hz
001 = 14.7 Hz
010 = 22.1 Hz
011 = 29.4 Hz
100 = 35.3 Hz (default)
101 = 44.1 Hz
110 = 58.8 Hz
111 = 88.2 Hz
THRM = 1 causes the THERM pin (Pin 14/20) to assert low as an output when this
temperature channel’s THERM limit has been exceeded by 0.25°C. The THERM pin
remains asserted until the temperature is equal to or below the THERM limit. The
minimum time that THERM asserts is one monitoring cycle. This allows clock
modulation of devices that incorporate this feature.
THRM = 0 makes the THERM pin act as an input only, for example, for Pentium 4
PROCHOT monitoring, when Pin 14/20 is configured as THERM .
These bits determine the PWM duty cycle vs. the temperature slope for automatic fan
control.
0000 = 2°C
0001 = 2.5°C
0010 = 3.33°C
0011 = 4°C
0100 = 5°C
0101 = 6.67°C
0110 = 8°C
0111 = 10°C
1000 = 13.33°C
1001 = 16°C
1010 = 20°C
1011 = 26.67°C
1100 = 32°C (Default)
1101 = 40°C
1110 = 53.33°C
1111 = 80°C
Rev. A | Page 72 of 84
RANGE
RANGE
/PWM1 frequency.
/PWM3 frequency.
RANGE
/PWM2 frequency.
Power-On Default
0xC4
0xC4
0xC4