SCH3112 Datasheet, PDF (203/396 Pages) SMSC Corporation – LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports

LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
Datasheet
Chapter 23 Temperature Monitoring and Fan Control
23.1
The Hardware Monitoring (HWM) block contains the temperature monitoring and fan control functions.
The following sub-sections describe the HWM block features.
Block Diagram
LPC Interface
SIO LOGIC
LPC
Interface
Block
Runtime
Reg's
(Logical
Device A)
HWM BLOCK
Analog
Index
Data
HWM Registers
Digital
THERMTRIP
Monitoring Logic
Fan Control &
Monitoring
Interrupt
Generation Logic
Remote1+
Remote1-
Remote2+
Remote2-
PWM1
PWM2
PWM3
TACH1
TACH2
TACH3
nHWM_INT
23.2
Figure 23.1 HWM Block Embedded in SCH311X
HWM Interface
The SCH311X HWM block registers are accessed through an index and data register located at offset
70h and 71h, respectively, from the the address programmed in the Base I/O Address in Logical
Device A (also referred to as the Runtime Register set).
SMSC SCH311X
187
DATASHEET
Rev 0.2 (09-28-04)