3
TABLE OF CONTENTS
FEATURES ............................................................................................................................................ 1
GENERAL DESCRIPTION .................................................................................................................... 2
TABLE OF CONTENTS......................................................................................................................... 3
Key Specifications ............................................................................................................................... 5
PIN CONFIGURATION .......................................................................................................................... 5
PIN DESCRIPTION................................................................................................................................ 6
DESCRIPTION OF PIN FUNCTIONS ....................................................................................................6
Functional Description ........................................................................................................................ 9
General Description ........................................................................................................................... 9
Access Interface ................................................................................................................................ 9
Analog Inputs ................................................................................................................................... 16
FAN Speed Count and FAN Speed Control ..................................................................................... 19
Temperature Measurement Machine ............................................................................................... 21
REGISTERS AND RAM....................................................................................................................... 25
Address Register (Port x5h) ............................................................................................................. 25
Data Register (Port x6h) .................................................................................................................. 26
Configuration Register
! Index 40h ................................................................................................ 27
Interrupt Status Register 1
! Index 41h........................................................................................... 28
Interrupt Status Register 2
! Index 42h.......................................................................................... 28
nSMI Mask Register 1
! Index 43h................................................................................................. 29
nSMI Mask Register 2
! Index 44h................................................................................................. 29
Reserved Register
! Index 45h ...................................................................................................... 30
Chassis Clear Register -- Index 46h ................................................................................................ 30
VID/Fan Divisor Register
! Index 47h ............................................................................................ 30
Serial Bus Address Register
! Index 48h....................................................................................... 31
Value RAM
! Index 20h- 3Fh or 60h - 7Fh (auto-increment) ......................................................... 31
Voltage ID (VID4) & Device ID -- Index 49h ..................................................................................... 32
Temperature 2 and Temperature 3 Serial Bus Address Register--Index 4Ah.................................. 33
Pin Control Register -- Index4Bh ..................................................................................................... 33
nIRQ/nOVT Property Select -- Index 4Ch ........................................................................................ 34
FAN IN/OUT and BEEP/nGPO Control Register -- Index 4Dh ......................................................... 35
Register 50h ~ 5Fh Bank Select -- Index 4Eh.................................................................................. 36
SMSC Vendor ID -- Index 4Fh ......................................................................................................... 36
SMSC Test Register -- Index 50h - 55h (Bank 0)............................................................................ 37
BEEP Control Register 1-- Index 56h (Bank 0) ................................................................................ 37
BEEP Control Register 2-- Index 57h (Bank 0) ................................................................................ 38
Chip ID -- Index 58h (Bank 0) .......................................................................................................... 38
Reserved Register -- Index 59h (Bank 0)........................................................................................ 39
PWMOUT2 Control -- Index 5Ah (Bank 0) ....................................................................................... 39
PWMOUT1 Control -- Index 5Bh (Bank 0) ....................................................................................... 40
PWMOUT1/2 Clock Select -- Index 5Ch (Bank 0)............................................................................ 41
VBAT Monitor Control Register -- Index 5Dh (Bank 0)..................................................................... 41
PWMOUT3 Control -- Index 5Eh (Bank 0) ....................................................................................... 42
PWMOUT4 Control -- Index 5Fh (Bank 0) ....................................................................................... 42
Temperature Sensor 2 Temperature (High Byte) Register - Index 50h (Bank 1) ............................. 43