EMC2101-ACZT-TR SMSC, EMC2101-ACZT-TR Datasheet
EMC2101-ACZT-TR
Specifications of EMC2101-ACZT-TR
Related parts for EMC2101-ACZT-TR
EMC2101-ACZT-TR Summary of contents
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... DD while the PWM output has a range 100% with steps. The EMC2101 has an option to automatically upload the contents of an attached SMBus compatible EEPROM for auto-programming upon power up. Advanced thermal sensing enables reduced validation and characterization time as well as accurately operat- ing with smaller-geometry processors ...
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... EMC2101-ACZL-TR FOR 8-PIN, MSOP LEAD-FREE ROHS COMPLIANT PACKAGE EMC2101-R-ACZL-TR FOR 8-PIN, MSOP LEAD-FREE ROHS COMPLIANT PACKAGE EMC2101-ACZT-TR FOR 8-PIN, SOIC LEAD-FREE ROHS COMPLIANT PACKAGE 80 ARKAY DRIVE, HAUPPAUGE, NY 11788 (631) 435-6000, FAX (631) 273-3123 Copyright © 2009 SMSC or its subsidiaries. All rights reserved. ...
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... Chapter 3 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.1 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.2 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.3 SMBus Client Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.4 EEPROM Loader Electrical Specifications (EMC2101-R only Chapter 4 System Management Bus Interface Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.1 System Management Bus Interface Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.2 Write Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.3 Read Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.4 Send Byte ...
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... Averaging Filter Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 6.24 Product ID Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 6.25 Manufacturer ID Register (FEh 6.26 Revision Register (FFh Chapter 7 Package Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Appendix A Advanced PWM Options Appendix B TACH Reference Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Revision 2.54 (06-16-09) SMBus Fan Control with 1°C Accurate Temperature Monitoring 4 DATASHEET Datasheet SMSC EMC2101 ...
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... List of Figures Figure 2.1 EMC2101 Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 4.1 SMBus Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Figure 5.1 System Diagram for EMC2101 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 5.2 System Diagram for EMC2101- Figure 5.3 Block Diagram of Temperature Monitoring Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Figure 5.4 External Diode configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Figure 5.5 Temperature Filter Step Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Figure 5 ...
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... Table 4.6 Alert Response Address Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Table 4.7 Block Read Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Table 5.1 ALERT/ TACH Pull-up Resistors - SMBus / FAN MODE for EMC2101 Table 5.2 EMC2101 External Temperature Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Table 5.3 EMC2101 Internal Temperature Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Table 6.1 Register Set in Hexadecimal Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Table 6 ...
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... SMBus Fan Control with 1°C Accurate Temperature Monitoring Datasheet Chapter 1 Device Selection The EMC2101 is available with the following options and configurations as shown in PART NUMBER FAN OPERATION EMC2101 PWM Drive, 0% drive EMC2101-R Selected via pull-up SMSC EMC2101 Table 1.1 Device Selection COMMUNICATIONS ...
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... SMCLK 1 SMDATA 7 2 EMC2101 3 ALERT / TACH 6 4 GND 5 Figure 2.1 EMC2101 Pinout Table 2.1 Pin Description FUNCTION 3.3V Power supply External diode positive (anode) connection External diode negative (cathode) connection PWM Output (default - software programmed) DAC Output software programmed Ground ALERT - Open drain I/O operates as ...
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... PIN TYPE Power DIOD OD SMSC EMC2101 Table 2.2 Pin Types DESCRIPTION This pin is used to supply power or ground to the device. Digital Input - this pin is used as a digital input. This pin is 5V tolerant. Analog Input - this pin is used as an input for analog signals. ...
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... AC power is switched on or off. In addition, voltage transients on the AC power line may appear on the DC output. If this possibility exists suggested that a clamp circuit be used. Note 3.1 For the 5V tolerant pins that have a pull-up resistor, the pull-up voltage must not exceed 3.6V when the EMC2101 is unpowered. 3.2 Electrical Specifications V = 3.0V to 3.6V, T ...
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... CONV External Channel Diode Decoupling C FILTER Capacitor Diode Decoupling C FILTER Capacitor Resistance Error R SERIES Correction TACH Accuracy Fan Counter Clock Frequency PWM Resolution PWM Frequency f PWM SMSC EMC2101 Typical values are MIN TYP MAX UNIT 0 200 uA 300 uA 300 400 uA μA 270 Internal Temperature Monitor ± ...
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... DATASHEET Datasheet = 27°C unless otherwise noted CONDITIONS Current Load = ±1mA Measured at 3/4 full scale Capacitive Load = 100pF 8mA Current Source 8mA Current Sink Device powered or unpowered T < 85°C A pull-up voltage < 3.6V = 27°C unless otherwise noted CONDITIONS V = 0.4V OL SMSC EMC2101 ...
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... RISE Capacitive Load C LOAD Note 3.2 300ns rise time max is required for 400kHz bus operation. For lower clock frequencies the maximum rise time is (0 3.4 EEPROM Loader Electrical Specifications (EMC2101-R only) Table 3.4 EEPROM Loader Electrical Specifications V = 3.0V to 3.6V CHARACTERISTIC SYMBOL ...
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... SMBus Fan Control with 1°C Accurate Temperature Monitoring Typical values are MIN TYP MAX UNITS 0.6 us 0.3 us 100 ns 1.3 us 0.6 us 300 ns 300 ns 400 pF 14 DATASHEET Datasheet = 27°C unless otherwise noted CONDITIONS Min = 20+0.1C ns LOAD Min = 20+0.1C ns LOAD per bus line SMSC EMC2101 ...
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... T BUF Start Condition The EMC2101 is SMBus 2.0 compatible and supports Send Byte, Read Byte, Receive Byte and the Alert Response Address as valid protocols as shown below. All of the below protocols use the convention in 4.2 Write Byte The Write Byte is used to write one byte of data to the registers as shown below ...
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... Table 4.4 Send Byte Protocol REGISTER WR ACK ADDRESS 1 1 Table 4.5. Table 4.5 Receive Byte Protocol RD ACK REGISTER DATA 1 1 Table 4.6. DEVICE RD ACK ADDRESS DATASHEET Datasheet Table 4.3. RD ACK Register NACK STOP Data Table 4.4. ACK STOP NACK STOP NACK STOP SMSC EMC2101 ...
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... SMBus Fan Control with 1°C Accurate Temperature Monitoring Datasheet The EMC2101 will respond to the ARA in the following way when the ALERT / TACH pin is configured as an Interrupt: 1. Send Slave Address and verify that full slave address was sent (i.e. the SMBus communication from the device was not prematurely stopped due to a bus contention event) ...
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... The EEPROM should be loaded to mirror the register set of the EMC2101 with the desired configuration set. All undefined registers in the EMC2101 register set should be loaded with 00h in the EEPROM. Likewise, all registers that are read-only in the EMC2101 register set should be loaded with 00h in the EEPROM ...
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... SMBus Fan Control with 1°C Accurate Temperature Monitoring Datasheet Chapter 5 General Description The EMC2101 is an environmental monitoring device with a selectable PWM or DAC fan driver output, one external temperature monitoring channel and one internal temperature monitor. It contains advanced circuitry to remove errors induced by series resistance and CPU thermal diode process differences to provide accurate temperature measurements and accurate fan control ...
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... Power Up (EMC2101-R Only) The EMC2101-R (only) will power up with the fan driver set to either 100% duty cycle or 0% duty cycle, depending on the value of the pull-up resistor on the ALERT / TACH pin. (See in this state until either the Fan Setting Register is written or until the following activities have occurred: 1. The Fan Control Look-Up Table is loaded and the PROG bit is set to ‘ ...
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... Registers as normal) and the MASK bits will do nothing. Likewise, the device will not respond to the ARA command. For the EMC2101-R, the value of this pull-up resistor determines the initial FAN output mode of operation as well as whether the device auto loads from an EEPROM or via an SMBus host per Table 5 ...
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... The MASK bit behaves differently depending on which mode the ALERT / TACH pin is configured to operate in. If the EMC2101 is configured with the ALERT / TACH pin operating in Interrupt Mode, the MASK bit will be set in the following cases: 1. Automatically after the Status Register has been read if any bits in the Status Register have been set (except BUSY and FAULT) (See 2 ...
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... PNP Figure 5.3 Block Diagram of Temperature Monitoring Circuit Figure 5.3 shows a block diagram of the temperature measurement circuit. As shown, the EMC2101 incorporates a delta-sigma analog to digital converter that integrates the temperature diode voltage from multiple bias currents. The external temperature diodes can be connected as shown in ...
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... The EMC2101 measures temperatures from -64°C to 127°C represented as a binary two’s complement number. Internal temperatures are in 1°C steps, external temperatures are in 0.125°C steps. Table 5.2 shows the temperature format for the external diode and format for the internal diode. ...
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... SMBus Fan Control with 1°C Accurate Temperature Monitoring Datasheet 5.5.2 Temperature Filter The EMC2101 contains variable filtering options to suppress thermally or electrically noisy signals on the External Diode lines. This filter can be configured as Level 1, Level 2, or Disabled (see Section 6.23). The typical filter performance is shown in ...
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... Programmable Ideality Factor The EMC2101 is designed for an external diode with an ideality factor of 1.008. When an external diode, processor or discrete, has a different ideality factor, an error is introduced in the temperature measurement which must be corrected. This is typically done using programmable offset registers but this correction is only accurate at one temperature since an ideality factor mismatch introduces an error that is a linear function of temperature ...
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... Datasheet 5.6 Fan Control The EMC2101 includes either a PWM or a linear DAC based fan driver on the shared FAN pin. Both PWM and DAC use the Fan Control Look-Up Table and/or Fan Setting Register interchangeably as well as the Spin-Up Routine. In addition, the EMC2101 can monitor the fan speed using the ALERT / TACH pin. ...
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... If the Fan Control Look-Up Table is not used, the user may program the fan output directly by writing to the Fan Setting Register (4Ch - see Revision 2.54 (06-16-09) SMBus Fan Control with 1°C Accurate Temperature Monitoring Fan Setting Measurement taken Time Section 6.18). 28 DATASHEET Datasheet Fan Setting SMSC EMC2101 ...
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... SMBus Fan Control with 1°C Accurate Temperature Monitoring Datasheet 5.7 Fault Queue The EMC2101 supports a Fault Queue feature to reduce interrupts caused by spurious temperature readings. This feature, (see three consecutive out-of-limit HIGH, LOW, or T_CRIT temperature readings. example of this behavior. The Fault Queue only applies to the External Diode channels. ...
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... Page 33 00h Page 33 00h Page 33 00h Page 34 08h Page 35 (16 / sec) 46h Page 36 (70°C) 46h Page 36 (70°C) 00h Page 36 (0°C) 00h Page 36 00h Page 37 00h Page 33 00h Page 37 00h Page 37 00h Page 36 00h Page 36 A4h Page 37 SMSC EMC2101 ...
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... R/W (See Lookup Table Fan Setting 3 Note 6.1) 56h R/W (See Lookup Table Temp Setting 4 Note 6.1) SMSC EMC2101 FUNCTION Sets ideality factor based on diode type Compensates for transistors with various beta factors Fan will be set to full speed if external temp above this ...
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... Selects averaging function for external diode ID SMSC REV 32 DATASHEET Datasheet DEFAULT VALUE PAGE 3Fh Page 46 7Fh Page 46 3Fh Page 46 7Fh Page 46 3Fh Page 46 7Fh Page 46 3Fh Page 46 7Fh Page 46 3Fh Page 46 00h Page 47 16h or 28h Page 48 5Dh Page 48 01h Page 48 SMSC EMC2101 ...
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... Bit 6 - INT_HIGH - Internal temperature has met or exceeded the high limit. Bit 5 - EEPROM - Indicates that the EEPROM could not be found when the device powers up in the Auto-Program Mode (see for the EMC2101 device. Bit 4 - EXT_HIGH - External Diode temperature has exceeded the high limit. SMSC EMC2101 Table 6 ...
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... Configuration MASK 09h The configuration register controls the basic functionality of the EMC2101. The bits are described below: Bit 7 - MASK - Masks the ALERT / TACH pin functionality when the device is configured as an ALERT output in Interrupt Mode. This bit is ignored if the ALERT / TACH pin is configured as an ALERT output in Comparator Mode configured as a TACH input ...
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... TCRIT limit or drop below the low limit. 6.6 Conversion Rate Register ADDR. R/W REGISTER 04h and Conversion R/W 0Ah Rate Bits CONV[3:0] - The Conversion Rate Register controls the conversion rate per CONV[3: all others SMSC EMC2101 Table 6.5 Conversion Rate Register CONV3 Table 6.6 Conversion Rates ...
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... TEMP = T – T CRIT CRITHYS for ALERT / TACH pin functionality. Table 6.8 External Diode Force Register Sign DATASHEET Datasheet DEFAULT 46h (70° 46h (70° 00h (0° 00h - - - - 00h 55h (85° 0Ah (10°C) [ DEFAULT 00h SMSC EMC2101 ...
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... THIGH and TCRIT limits normally but not used to determine the fan speed. APPLICATION NOTE: This mode is used if the host or system requires temperature data from a source other than the EMC2101 External Diode to be used for fan control. 6.9 One Shot Register ADDR ...
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... Table 6.13 Ideality Factor Look-Up Table SETTING FACTOR 18h 1.0159 19h 1.0172 1Ah 1.0185 1Bh 1.0200 1Ch 1.0212 1Dh 1.0226 38 DATASHEET Datasheet DEFAULT IDCF[5:0] 12h SETTING FACTOR 28h 1.0371 29h 1.0384 2Ah 1.0397 2Bh 1.0410 2Ch 1.0423 2Dh 1.0436 SMSC EMC2101 ...
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... External Diode channel. Care should be taken when setting the BETA[2:0] bits. If the Beta Compensation factor is set at a beta value that is higher than the transistor beta, then the circuit may introduce measurement errors. SMSC EMC2101 SETTING FACTOR 1Eh 1 ...
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... TACH11 TACH10 TACH9 TACH8 (2048) (1024) (512) (256) [3] (see also Appendix B "TACH Where: TACH_COUNT is the decimal representation of the TACH[13:0] bits TACH_ TACH_ TACH_ TACH_ TACH_ TACH_ TACH_ TACH_ L11 L10 L9 L8 SMSC EMC2101 Datasheet DEFAULT FFh FFh [3] DEFAULT FFh FFh ...
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... The value written into the Fan Setting Register will be instantly applied to the fan driver and the Fan Control Look-Up Table will not be used. Bit 4 - POLARITY- sets the polarity of the Fan output driver. For the EMC2101-R, the value of this bit is determined by the value of the pull-up resistor on the ALERT / TACH pin (see PWM default value is set at 100% duty cycle, the default value is set to ‘ ...
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... SMBus Fan Control with 1°C Accurate Temperature Monitoring Table 6.19 TACH Modes TACH_M[ FAST_ - - SPIN_DRIVE[1:0] TACH 42 DATASHEET Datasheet TACH MODE False readings when under minimum detectable RPM (TACH Limit). (Default condition - See Note 6.2) FFFFh reading when under minimum detectable RPM DEFAULT SPIN_TIME[2:0] 3Fh Section 6.5) is SMSC EMC2101 ...
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... If the Fan Control Look-Up Table is disabled, then the fan drive will be set at the last value that was used by the Fan Control Look-Up Table. When the Fan Control Look-Up Table Registers are being used, the register is read-only. SMSC EMC2101 Table 6.21 Spin-Up Drive SPIN UP DRIVE ...
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... SMBus Fan Control with 1°C Accurate Temperature Monitoring [4] below. FAN _ SETTING ⎛ ⎞ -------------------------------------------- × FAN = V ⎝ ⎠ Table 6.24 PWM Frequency Register PWM_D[7:0] 44 DATASHEET Datasheet Section 6.16). Therefore, a value of 00h in = 3.3V) below DEFAULT PWM_F[4:0] 17h Appendix A "Advanced DEFAULT 01h Equation SMSC EMC2101 [4] with DD [5]. ...
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... Fan Control Look- 4Fh R/W Up Table Hysteresis The Fan Control Look-Up Table Hysteresis Register determines the amount of hysteresis applied to the temperature inputs of the fan control Fan Control Look-Up Table. See SMSC EMC2101 PWM_F is the setting of the PWM 1 5806 ⎞ × ---------------- - ...
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... Revision 2.54 (06-16-09) SMBus Fan Control with 1°C Accurate Temperature Monitoring DATASHEET Datasheet DEFAULT 7Fh 3Fh 7Fh 3Fh 7Fh 3Fh 7Fh 3Fh 7Fh 3Fh 7Fh 3Fh 7Fh 3Fh 7Fh 3Fh Section 6.16) is set to ‘0’, these SMSC EMC2101 ...
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... Bit 0 - ALERT_COMP - determines the functionality of the ALERT / TACH pin. ‘0’ (default) - the ALERT / TACH pin is configured to act as an interrupt (see ‘1’ - the ALERT / TACH pin is configured to operate as a temperature comparator (see Section 5.4.1). SMSC EMC2101 Table 6.29 Averaging Filter Register ...
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... Manufacturer ID Register (FEh) ADDR. R/W REGISTER SMSC ID FEh R Register The Manufacturer ID register contains an 8 bit word that identifies the SMSC as the manufacturer of the EMC2101. 6.26 Revision Register (FFh) ADDR. R/W REGISTER FFh R Revision Register The Revision register contains an 8 bit word that identifies the die revision. ...
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Chapter 7 Package Diagrams 3 D PIN 1 IDENTIFIER AREA (D/2 X E1/ TOP VIEW C SEATING PLANE A1 ccc C SIDE VIEW C GAUGE PLANE 0.25 SEATING PLANE 0° - 8° DETAIL ...
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SEE DETAIL "A" INDEX AREA (D/2 X E1/ TOP VIEW END VIEW SEATING PLANE A1 ccc C SIDE VIEW 3-D VIEW H 0.25 ...
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... EFFECTIVE _ DUTY _ CYCLE = ⎝ EFFECTIVE _ RESOLUTION PWM _ FREQUENCY PWM _ FREQUENCY SMSC EMC2101 Equation [8] or (see Section 6.20, "PWM Frequency Divide Register," on page Equation [6] [7]. This is a result of the “on” time determined by Fan Setting changing with FAN _ SETTING Where: PWM_F is the setting of the PWM ⎞ ...
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Table A.1 Fan Effective Duty Cycle Resolution and Frequency EFFECTIVE EFFECTIVE DUTY PWM_F [4:0] RESOLUTION CYCLE (AT 75% SETTING (%) FAN_SETTING) 00h 01h 50.00 100% 02h 25.00% 100% 03h 16.67% 100% 04h 12.50% 100% 05h 10.00% 100% 06h 8.33% 100% ...
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Table A.1 Fan Effective Duty Cycle Resolution and Frequency (continued) EFFECTIVE EFFECTIVE DUTY PWM_F [4:0] RESOLUTION CYCLE (AT 75% SETTING (%) FAN_SETTING) 14h 2.50 100% 15h 2.38 100% 16h 2.27 100% 17h 2.17 100% 18h 2.08 100% 19h 2.00 96% ...
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Appendix B TACH Reference Table DEC HEX RPM DEC HEX 512 200h 10547 1280 500h 528 210h 10227 1296 510h 544 220h 9926 1312 520h 560 230h 9643 1328 530h 576 240h 9375 1344 540h 592 250h 9122 1360 550h ...
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Table B.1 Example TACH Decode 10k RPM to 1k RPM (continued) DEC HEX RPM DEC HEX RPM 832 340h 6490 1600 640h 3375 848 350h 6368 1616 650h 3342 864 360h 6250 1632 660h 3309 880 370h 6136 1648 670h ...
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Table B.1 Example TACH Decode 10k RPM to 1k RPM (continued) DEC HEX RPM DEC HEX RPM 1216 4C0h 4441 1984 7C0h 2722 1232 4D0h 4383 2000 7D0h 2700 1248 4E0h 4327 2016 7E0h 2679 1264 4F0h 4272 2032 7F0h ...
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... Table 2.2, "Pin Types" Table 3.1, "Absolute Maximum Ratings" Table 3.2, "Electrical Specifications" SMSC EMC2101 Customer Revision History Added table and the following application note above the table: “For the 5V tolerant pins that have a pull-up resistor, the voltage difference between VDD and the pull-up voltage must never exceed 3.6V.” ...