LM96000CIMT/NOPB National Semiconductor, LM96000CIMT/NOPB Datasheet
LM96000CIMT/NOPB
Specifications of LM96000CIMT/NOPB
*LM96000CIMT/NOPB
LM96000CIMT
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LM96000CIMT/NOPB Summary of contents
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... Monitors 2 remote thermal diodes ■ Programmable autonomous fan control based on temperature readings Block Diagram © 2008 National Semiconductor Corporation ■ Noise filtering of temperature reading for fan control ■ 1.0°C digital temperature sensor resolution ■ 3 PWM fan speed control outputs ■ ...
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Connection Diagram Pin Descriptions Symbol Pin SMBDAT SMBus SMBCLK VID0 VID1 VID2 Processor VID Lines VID3 VID4 19 3.3V Power GND 5V 20 12V 21 Voltage Inputs 2.5V 22 VCCP_IN 23 www.national.com 24 Pin TSSOP NS Package MTC24E Top View ...
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Symbol Pin Remote1+ 18 Remote1− 17 Remote Diodes Remote2+ 16 Remote2− 15 TACH1 11 TACH2 12 Fan Tachometer TACH3 9 Inputs TACH4/Address 14 Select PWM1/xTest Out 24 PWM2 10 Fan Control PWM3/Address 13 Enable Type Name and Function/Connection Remote Thermal ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage, V+ Voltage on Any Digital Input or Output Pin Voltage on 12V Analog Input Voltage on 5V Analog Input Voltage on Remote1+, Remote2+, Current on Remote1−, Remote2− ...
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Symbol Parameter DIGITAL OUTPUT: PWM1, PWM2, PWM3, XTESTOUT I Logic Low Sink Current OL V Logic Low Level OL SMBUS OPEN-DRAIN OUTPUT: SMBDAT V Logic Low Output Voltage OL I High Level Output Current OH SMBUS INPUTS: SMBCLK. SMBDAT V ...
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Symbol Parameter t Repeated Start Condition Setup Time SU:STA t Stop Condition Setup Time SU:STO t Data Output Hold Time HD:DAT t Data Input Setup Time SU:DAT t Data And Clock Low Time To Reset Of TIMEOUT SMBus Interface Logic(Note ...
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Pin # Pin Name Circuit 1 SMBDAT A 2 SMBCLK 3 GND B 4 3.3V 5 VID0 A 6 VID1 7 VID2 8 VID3 9 TACH3 10 PWM2 11 TACH1 12 TACH2 13 PWM3/AddEnable 14 TACH4/AddSel 15 REMOTE2− ...
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Functional Description 1.0 SMBUS The LM96000 is compatible with devices that are compliant to the SMBus 2.0 specification. More information on this bus can be found at: http://www.smbus.org/. Compatibility of SM- Bus2.0 to other buses is discussed in the SMBus ...
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FAN REGISTER DEVICE SET-UP The BIOS will follow the following steps to configure the fan registers on the LM96000. The registers corresponding to each function are listed. All steps may not be necessary if default values are acceptable. Regardless ...
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REGISTER SET Register Read/ Register Address Write Name 20h R 2.5V 21h R VCCP_IN 22h R 3.3V 23h R 5V 24h R 12V 25h R Processor (Zone1) Temp 26h R Internal (Zone2) Temp 27h R Remote (Zone3) Temp 28h ...
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Register Read/ Register Address Write Name 51h R/W Internal (Zone2) High Temp 52h R/W Remote (Zone3) Low Temp 53h R/W Remote (Zone3) High Temp 54h R/W Tach1 Minimum LSB 55h R/W Tach1 Minimum MSB 56h R/W Tach2 Minimum LSB 57h ...
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Register 20-24h: Voltage Reading Register Read/ Register Address Write Name 20h R 2.5V 21h R VCCP 22h R 3.3V 23h R 5V 24h R 12V The Register Names difine the typical input voltage at which the reading is ¾ ...
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Register 28-2Fh: Fan Tachometer Reading Register Read/ Register Address Write Name 28h R Tach1 LSB 29h R Tach1 MSB 2Ah R Tach2 LSB 2Bh R Tach2 MSB 2Ch R Tach3 LSB 2Dh R Tach3 MSB 2Eh R Tach4 LSB ...
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... R Company ID The company ID register contains the company identification number. For National Semiconductor this is 01h. This number is assigned by Intel and is a method for uniquely identifying the part manufacturer. This register is read only — a write to this register has no effect. 4.6 Register 3Fh: Version/Stepping ...
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Register 40h: Ready/Lock/Start/Override Register Read/ Register Address Write Name 40h R/W Ready/Lock/Start/Override Bit Name R/W Default 0 START R LOCK R READY OVRID R/W 4–7 Reserved R 0 Bit 7 Bit 6 ...
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Register 41h: Interrupt Status Register 1 Register Read/ Register Address Write Name 41h R Interrupt Status 1 The Interrupt Status Register 1 bits will be automatically set, by the LM96000, whenever a fault condition is detected. A fault condition ...
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Register 42h: Interrupt Status Register 2 Register Read/ Register Address Write Name 42h R Interrupt Status Register 2 The Interrupt Status Register 2 bits will be automatically set, by the LM96000, whenever a fault condition is detected. Interrupt Status ...
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Registers 44-4Dh: Voltage Limit Registers Register Read/ Register Address Write Name 44h R/W 2.5V Low Limit 45h R/W 2.5V High Limit 46h R/W VCCP Low Limit 47h R/W VCCP High Limit 48h R/W 3.3V Low Limit 49h R/W 3.3V ...
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Registers 4E-53h: Temperature Limit Registers Register Read/ Register Address Write Name 4Eh R/W Processor (Zone1) Low Temp 4Fh R/W Processor (Zone1) High Temp 50h R/W Processor (Zone2) Low Temp 51h R/W Processor (Zone2) High Temp 52h R/W Processor (Zone3) ...
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Registers 54-5Bh: Fan Tachometer Low Limit Register Read/ Register Address Write Name 54h R/W Tach1 Minimum LSB 55h R/W Tach1 Minimum MSB 56h R/W Tach2 Minimum LSB 57h R/W Tach2 Minimum MSB 58h R/W Tach3 Minimum LSB 59h R/W ...
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Registers 5C-5Eh: Fan Configuration Register Read/ Register Address Write Name 5Ch R/W Fan1 Configuration 5Dh R/W Fan2 Configuration 5Eh R/W Fan3 Configuration This register becomes Read Only when the Ready/Lock/Start/Override register Lock bit is set. Any further attempts to ...
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Registers 5F-61h: Auto Fan Speed Range, PWM Frequency Register Read/ Register Address Write Name 5Fh R/W Zone1 Range/Fan1 Frequency 60h R/W Zone2 Range/Fan2 Frequency 61h R/W Zone3 Range/Fan3 Frequency In Auto Fan Mode, when the temperature for a zone ...
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HLFRQ Freq [2:0] 0 000 0 001 0 010 0 011 0 100 0 101 0 110 0 111 1 000 1 001 1 010 1 011 1 100 1 101 1 110 1 111 Range Selection RAN [3:0] RAN ...
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If the Remote1 or Remote2 pins are connected to a processor or chipset, instantaneous temperature spikes may be sampled by the LM96000. If these spikes are not ignored, the CPU fan (if connected to LM96000) may turn on prematurely and ...
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Registers 64-66h: Minimum PWM Duty Cycle Register Read/ Register Address Write Name 64h R/W Fan1 PWM Minimum 65h R/W Fan2 PWM Minimum 66h R/W Fan3 PWM Minimum These registers specify the minimum duty cycle that the PWM will output ...
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PWM Frequency PWM Duty Cycle Value in Decimal Level (%) 14. 21. 28. 35. 42. 109 50.00 110 - ...
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Temperature 4.19 Registers 6A-6Ch: Absolute Temperature Limit Register Read/ Register Address Write Name 6Ah R/W Zone1 Absolute Temp Limit 6Bh R/W Zone2 Absolute Temp Limit 6Ch R/W Zone3 Absolute Temp Limit In the Auto Fan mode zone exceeds ...
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Registers 6D-6Eh: Zone Hysteresis Registers Register Read/ Register Address Write Name 6Dh R/W Zone1 and Zone2 Hysteresis 6Eh R/W Zone3 Hysteresis If the temperature is above Fan Temp Limit, then drops below Fan Temp Limit, the following will occur: ...
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Setting (Tn[1:0]) Mode Function 00 0 Traditional tach input monitor, false readings when under minimum detctable RPM 01 1 Traditional tach input monitor, FFFFh reading when under minimum detectable RPM 10 2 Most accurate readings, FFFFh reading when under minimum ...
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XOR TEST MODE The LM96000 incorporates a XOR tree test mode. When the test mode is enabled by setting the “XEN” bit high in the Test Register at address 6Fh via the SMBus, the part will enter XOR test ...
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Physical Dimensions inches (millimeters) unless otherwise noted Order Number LM96000CIMT or LM96000CIMTX 24-Lead Molded TSSOP Package, NS Package Number MTC24E JEDEC Registration MO-153, Variation AD 31 www.national.com ...
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