W83627UHG Nuvoton Technology Corporation of America, W83627UHG Datasheet - Page 60

• Manufacturer Part Number: W83627UHG
• Description: IC I/O CONTROLLER 128-QFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627UHG

• Applications: PC's, PDA's
• Interface: LPC
• Voltage - Supply: 3.3V, 5V
• Package / Case: 128-XFQFN
• Mounting Type: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.7
7.7.1
The SMI#/OVT# pin (pin 95) is a multi-function pin. It can be in SMI# mode or in OVT# mode by
setting Configuration Register CR[29h], bit 6 to one or zero, respectively. In SMI# mode, it can monitor
voltages, fan counts, or temperatures.
7.7.1.1
The SMI# pin can create an interrupt if a voltage exceeds a specified high limit or falls below a
specified low limit. This interrupt must be reset by reading all the interrupt status registers, or
subsequent events do not generate interrupts. This mode is illustrated in the following figure.
S
S
CPUFANOUT
CPUFANOUT
MART
MART
Interrupt Detection
MODE
MODE
SMI#
Low limit
F
F
High limit
AN
SMI# Interrupt Mode
Voltage SMI# Mode
AN
TM
TM
III
III
Table 7-10 Relative Register – at S
TEMPERATURE
OUTPUT STEP
Bank0, Index
Bank0, Index
*Interrupt Reset when Interrupt Status Registers are read
TARGET
Figure 7-17 SMI Mode of Voltage and Fan Inputs
*
06h
68h
*
*
Bank0, Index
Bank0, Index
TOLERANCE
STEP DOWN
07h, bit 4-7
TIME
*
0Fh
-49-
MART
F
Index 0Eh
Index 09h
(MIN. FAN
OUTPUT)
STEP UP
AN
VALUE
Bank0,
Bank0,
Fan Count limit
STOP
TIME
TM
SMI#
Publication Release Date: May 25, 2007
III Control Mode
Bank0, Index
Bank0, Index
KEEP MIN.
MAX. FAN
12h, bit 4
OUTPUT
OUTPUT
VALUE
W83627UHG
FAN
67h
*
Index 0Dh
Revision 1.0
*
Bank0,
STOP
TIME