SMSC EMC6D102
DATASHEET
Revision 0.4 (04-05-05)
Datasheet
PRODUCT FEATURES
EMC6D102
Fan Control Device with
Hardware Monitoring and
Acoustic Noise Reduction
Features
3.3 Volt Operation (5 Volt Tolerant Input Buffers)
SMBus 2.0 compliant interface (Fixed, Not
Discoverable) With Three Slave Address Options
Fan Control
-- PWM (Pulse width Modulation) Outputs (3)
-- Fan Tachometer Inputs (4)
-- Individual status and enable bits per tach input
-- Programmable automatic fan control based on
temperature
-- Fan ramp rate control for acoustic noise reduction
Temperature Monitor
-- Monitoring of Two Remote Thermal Diodes (+/- 3 deg
C accuracy)
-- Internal Ambient Temperature Measurement
-- Limit Comparison of all Monitored Values
-- Individual status and enable bits per thermal input
-- Interrupt Pin for out-of-limit Temperature Indication
-- Configurable offset for internal or external temperature
channels.
-- Supports 4 programmable temperature averaging
modes
-- 2 monitoring modes: Continuous or Cycle (Power
Saving mode)
-- Offers 2 Low Power Modes when monitoring is off:
Sleep and Shutdown
Voltage Monitor
-- Monitor Power supplies (+2.5V, +5V, +12V, Vccp, and
VCC)
-- Individual status and enable bits per voltage input
-- Limit Comparison of all Monitored Values
-- Interrupt Pin for out-of-limit Voltage Indication
-- Supports 4 programmable voltage averaging modes
-- 2 monitoring modes: Continuous or Cycle (Power
Saving mode)
-- Offers 2 Low Power Modes when monitoring is off:
Sleep and Shutdown
5 VID (Voltage Identification) inputs
XOR Tree test mode
Mechanical Package (24-pin SSOP); green, lead-free
package also available
ORDER NUMBER(S):
EMC6D102-CK FOR 24 PIN SSOP PACKAGE
EMC6D102-CK-TR FOR 24 PIN SSOP PACKAGE
EMC6D102-CZC FOR 24 PIN SSOP PACKAGE (GREEN, LEAD-FREE)
EMC6D102-CZC-TR FOR 24 PIN SSOP PACKAGE (GREEN, LEAD-FREE)
80 Arkay Drive
Hauppauge, NY 11788
(631)
435-6000
FAX (631) 273-3123
Copyright SMSC 2005. All rights reserved.
Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently,
complete information sufficient for construction purposes is not necessarily given. Although the information has been checked and is believed to be
accurate, no responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any
time without notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this
information does not convey to the purchaser of the described semiconductor devices any licenses under any patent rights or other intellectual
property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated
version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product may
contain design defects or errors known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly
sheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life support or other
application where product failure could cause or contribute to personal injury or severe property damage. Any and all such uses without prior written
approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of this document or other
SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSC's website at http://www.smsc.com. SMSC is a
registered trademark of Standard Microsystems Corporation ("SMSC"). Product names and company names are the trademarks of their respective
holders.
SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND AGAINST INFRINGEMENT AND THE LIKE,
AND ANY AND ALL WARRANTIES ARISING FROM ANY COURSE OF DEALING OR USAGE OF TRADE.
IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT, INCIDENTAL, INDIRECT, SPECIAL, PUNITIVE, OR CONSEQUENTIAL
DAMAGES; OR FOR LOST DATA, PROFITS, SAVINGS OR REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION,
WHETHER BASED ON CONTRACT; TORT; NEGLIGENCE OF SMSC OR OTHERS; STRICT LIABILITY; BREACH OF WARRANTY; OR
OTHERWISE; WHETHER OR NOT ANY REMEDY OF BUYER IS HELD TO HAVE FAILED OF ITS ESSENTIAL PURPOSE, AND WHETHER
OR NOT SMSC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
Fan Control Device with Hardware Monitoring and Acoustic Noise Reduction Features
Datasheet
Revision 0.4 (04-05-05)
2
SMSC EMC6D102
DATASHEET
Fan Control Device with Hardware Monitoring and Acoustic Noise Reduction Features
Datasheet
SMSC EMC6D102
3
Revision 0.4 (04-05-05)
DATASHEET
Table of Contents
Chapter 1 General Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Chapter 2 Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Chapter 3 Pin Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1
Pin Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2
Buffer Type Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3
3.3V Operation, 5V Tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Chapter 4 SMBus Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1
Slave Address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2
Slave Bus Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3
Bus Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.4
Invalid Protocol Response Behavior. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.4.1
Undefined Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.5
General Call Address Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.6
Slave Device Time-Out. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.7
Stretching the SCLK Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.8
SMBus Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.9
Bus Reset Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.10 SMBus Alert Response Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Chapter 5 Hardware Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1
Input Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.2
Resetting the EMC6D102 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.2.1
Power-On Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.2.2
Soft Reset (Initialization) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.3
Monitoring Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.3.1
Continuous Monitoring Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.3.2
Cycle Monitoring Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4
Interrupt Status Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.4.1
Diode Fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.5
Interrupt Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.6
Low Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.6.1
Sleep Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.6.2
Shutdown Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.7
Analog Voltage Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.8
Voltage ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.9
Temperature Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.9.1
Internal Temperature Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.9.2
External Temperature Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.9.3
Temperature Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.9.4
Offset Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.10 Thermal Zones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Chapter 6 Fan Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.1
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.1.1
Limit and Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.1.2
Device Set-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.1.3
PWM Fan Speed Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.1.4
Fan Speed Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Fan Control Device with Hardware Monitoring and Acoustic Noise Reduction Features
Datasheet
Revision 0.4 (04-05-05)
4
SMSC EMC6D102
DATASHEET
6.1.5
Linking Fan Tachometers to PWMs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Chapter 7 Register Set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.1
Undefined Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
7.2
Defined Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.2.1
Register 10h: SMSC Test Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.2.2
Register 1Dh, 1Eh, 1Fh: Offset Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.2.3
Registers 20-24h: Voltage Reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.2.4
Registers 25-27h: Temperature Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
7.2.5
Registers 28-2Fh: Fan Tachometer Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
7.2.6
Registers 30-32h: Current PWM Duty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.2.7
Register 3Eh: Company ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.2.8
Register 3Fh: Version / Stepping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.2.9
Register 40h: Ready/Lock/Start Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.2.10
Register 41h: Interrupt Status Register 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
7.2.11
Register 42h: Interrupt Status Register 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.2.12
Register 43h: VID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
7.2.13
Registers 44-4Dh: Voltage Limit Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.2.14
Registers 4E-53h: Temperature Limit Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.2.15
Registers 54-5Bh: Fan Tachometer Low Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
7.2.16
Registers 5C-5Eh: PWM Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
7.2.17
Registers 5F-61h: Zone Temperature Range, PWM Frequency . . . . . . . . . . . . . . . . . . . 60
7.2.18
Register 62h, 63h: Min/Off, PWM Ramp Rate Control . . . . . . . . . . . . . . . . . . . . . . . . . . 62
7.2.19
Registers 64-66h: Minimum PWM Duty Cycle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
7.2.20
Registers 67-69h: Zone Low Temperature Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
7.2.21
Registers 6A-6Ch: Absolute Temperature Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
7.2.22
Registers 6D-6Eh: Zone Hysteresis Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
7.2.23
Register 6F: XOR Test Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
7.2.24
Register 79h: SMSC Test Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
7.2.25
Register 7Ah: SMSC Test Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
7.2.26
Register 7Bh: SMSC Test Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
7.2.27
Register 7Ch: Special Function Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
7.2.28
Register 7Eh: Interrupt Enable 1 Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
7.2.29
Register 7Fh: Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
7.2.30
Register 80h: Interrupt Enable 2 Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
7.2.31
Register 81h: TACH_PWM Association Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
7.2.32
Register 82h: Interrupt Enable 3 Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
7.2.33
Registers 85h-88h: A/D Converter LSbs Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
7.2.34
Register 89h: SMSC Test Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
7.2.35
Registers 8Ah: SMSC Test Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
7.2.36
Registers 8Bh: SMSC Test Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
7.2.37
Registers 8Ch: SMSC Test Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
7.2.38
Registers 8Dh: SMSC Test Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
7.2.39
Registers 8Eh: SMSC Test Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
7.2.40
Registers 90h-93h: TachX Option Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
7.2.41
Registers 94h-96h: PWMx Option Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
7.2.42
Register 97h: SMSC Test Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
7.2.43
Register 98h:SMSC Test Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
7.2.44
Register FFh: SMSC Test Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Chapter 8 Operational Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
8.1
Maximum Guaranteed Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
8.2
Ratings for Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Chapter 9 Timing Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
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