W83627UHG Nuvoton Technology Corporation of America, W83627UHG Datasheet - Page 50

• 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

Agent to report whether the W83627UHG (PECI host) detects the PECI client or not and whether the
PECI client returns invalid FCS values from the polling for three successive times.
(4). Calculate TBase. For example, if PECI = -10 and the digital thermometer is 50’C, then TBase
could be set to 60’C. (60 – 10 = 50).
7. The temperature values in Bank 1 and Bank 2 Index 50h & 51h are:
Bank 1, Index 50h & 51h = (TBase) + (PECI Agent relative temperature)
Bank 2, Index 50h & 51h = (TBase) + (PECI Agent relative temperature)
selects PECI Agent 1 as the temperature source, the reported temperature will be 62°C (-10 + 72).
the Bank 1 Index 50h & 51h or Bank 2 Index 50h & 51h reading does not reflect the actual
temperature of the processor.
8. In addition, each PECI Agent relative temperature can be read in Logical Device C, CR[E0h] ~
CR[E7h], as long as Logical Device C, CR[E8h] bit 3 is set to “1”. When this bit is “1”, Logical Device
C, CR[E0h] ~ CR[E7h] become “Read Only” registers.
6. There are two temperature reading registers in the W83627UHG: Bank1, Index 50h & 51h, and
Bank2, Index 50h & 51h. The source of the Bank 1, Index 50h & 51h value is determined by the
value programmed into the CPUFANOUT monitor Temperature source select register (Hardware
Monitor Device, Bank 0, Index 49h, bits (2..0)). The source of Bank 2, Index 50h & 51h value is
determined by the value programmed into the SYSFANOUT monitor Temperature source select
register (Hardware Monitor Device, Bank 0, Index 4Ah, bits(7..5)).
Example:
If the PECI relative temperature of agent 1 is -10; TBase is set to 72°C, and Bank0 Index 49h
Please be noted that when the temperature source is selected as PECI temperature source,
9. A warning flag register at Logical Device C, CR[E8h] bit (7..4) is designed for each PECI
W83627UHG
(PECI Host)
Figure 7-8 PECI Illustration
PECI
Fan Control
-39-
Publication Release Date: May 25, 2007
PECI
CPU
W83627UHG
Revision 1.0