lm96163cisdx-1 National Semiconductor Corporation, lm96163cisdx-1 Datasheet - Page 23

• Manufacturer Part Number: lm96163cisdx-1
• Description: Remote Diode Digital Temperature Sensor With Integrated Fan Control And Trutherm Bjt Transistor Beta Compensation Technology
• Manufacturer: National Semiconductor Corporation

Address
Hex
54
55
56
57
reg 4A
reg 4A
Read/
Read.
(Write
only if
5 = 1)
Read.
(Write
only if
5 = 1)
Write
bit
bit
Bits
6:0
7:6
5:0
6:0
7:6
5:0
7
7
Value
0x7F
0x3F
0x7F
0x3F
POR
00
00
0
0
E3D7:E3D6
E3D5:E3D0
E4D7:E4D6
E4D5:E4D0
E3T6:E3T0
E4T6:E4T0
Name
E3T7
E4T7
Lookup Table Temperature Entry 3
Bit 7 is unused and always set to 0 in the low resolution temperature LUT mode.
In the high resolution temperature LUT mode bit 7 in conjunction with bits 6:0 of
this register are used to determine the limit temperature that the remote diode
temperature is compared to. In high resolution the range is 0°C to 127.5°C. In
low resolution mode the range is 0°C to 127°C. If the remote diode temperature
exceeds this value, the PWM output will be the value in Register 0x55. Only 9-
bits of the temperature reading are used in high resolution and 8-bits in low
resolution. Only positive temperature values can be programed in this register
and in all cases the sign bit is assumed to be zero. Temperatures greater than
127 °C or 127.5 °C can be programmed through the use of the Lookup Table
Temperature Offset Register (4Eh).
Lookup Table PWM Duty Cycle Extended Entry 3
These bits are unused and always set to 0 in the low resolution duty cycle LUT
mode. In the high resolution duty cycle LUT mode these bits in association with
bits 5:0 of this register are used for the PWM value associated with the
temperature limit in register 0x54. These bits can only be activated when PWM
frequency of 22.5kHz is chosen.
Lookup Table PWM Duty Cycle Entry 3
The PWM value corresponding to the temperature limit in register 0x54 for the
low resolution PWM mode.
Lookup Table Temperature Entry 4
Bit 7 is unused and always set to 0 in the low resolution temperature LUT mode.
In the high resolution temperature LUT mode bit 7 in conjunction with bits 6:0 of
this register are used to determine the limit temperature that the remote diode
temperature is compared to. In high resolution the range is 0°C to 127.5°C. In
low resolution mode the range is 0°C to 127°C. If the remote diode temperature
exceeds this value, the PWM output will be the value in Register 0x57. Only 9-
bits of the temperature reading are used in high resolution and 8-bits in low
resolution. Only positive temperature values can be programed in this register
and in all cases the sign bit is assumed to be zero. Temperatures greater than
127 °C or 127.5 °C can be programmed through the use of the Lookup Table
Temperature Offset Register (4Eh).
Lookup Table PWM Duty Cycle Extended Entry 4
These bits are unused and always set to 0 in the low resolution duty cycle LUT
mode. In the high resolution duty cycle LUT mode these bits in association with
bits 5:0 of this register are used for the PWM value associated with the
temperature limit in register 0x56. These bits can only be activated when PWM
frequency of 22.5kHz is chosen.
Lookup Table PWM Duty Cycle Entry 4
The PWM value corresponding to the temperature limit in register 0x56 for the
low resolution PWM mode.
23
Description
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