W83627UHG Nuvoton Technology Corporation of America, W83627UHG Datasheet - Page 55

• 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

7.6.3.2
Two pairs of fan input sensors and fan outputs in Fan Speed Cruise
Fan Speed Cruise
BIOS by a fan speed count (the amount of time between clock input signals, not the number of clock
input signals in a period of time) and an interval (e.g., 160 ± 10). As long as the fan speed count is in
the specified range, fan output remains the same. If the fan speed count is higher than the high end
(e.g., 170), fan output increases to make the count lower. If the fan speed count is lower than the low
end (e.g., 150), fan output decreases to make the count higher. One example is illustrated in this
figure.
The following tables show current temperature, fan output value and the relative control registers at
Thermal Cruise
Current CPU
Temperature
Current SYS
Temperature
Current
CPUFANOUT
Output Value
Current
SYSFANOUT
Output Value
DESCRIPTION
•
•
SYSFANIN and SYSFANOUT
CPUFANIN and CPUFANOUT
Fan Speed Cruise
TM
Count
and Fan Speed Cruise
TM
Fan
output
170
160
150
mode keeps the fan speed in a specified range. First, this range is defined in
Bank1, Index
50h ,51h
Bank0, Index
27h
Bank0, Index
03h
Bank0 Index
01h
REGISTER
ADDRESS
Table 7-6 Display Registers – at S
Figure 7-12 Mechanism of Fan Speed Cruise
(%)
100
50
0
TM
Mode
A
CPUTIN Temperature
Sensor
SYSTIN Temperature
Sensor
CPUFANOUT Output
Value Select
SYSFANOUT Output
Value Select
TM
REGISTER NAME
mode.
-44-
C
MART
Read only
Read only
80h / FFh by
strapping
80h / FFh by
strapping
F
ATTRIBUTE
AN
TM
TM
TM
mode.
I Mode
Mode
W83627UHG
8 MSB, 1°C bit 7,
0.5 °C
8 MSB, 1°C
Bits 7-0
CPUFANOUT Value
Bits 7-0
SYSFANOUT Value
BIT DATA