Fintek

Feature Integration Technology Inc.

V0.16P

20

F75125

Note:

*1 SVID_IN[7] is output by the processor to the F75125

*2 SVID_OUT[7] is output by the F75125 to the Vcore voltage regulator

6.6 CORE_TYPE

The CORE_TYPE is used to indicate which kind of processor placed and which kind of VID codes should be issued

by the processor. According to AMD’s reference circuit, the VID[1] is recommended tied with CORE_TYPE. In AM2,

CORE_TYPE is floating, and VID[1] is driven to VDDIO by the processor. The processor will issue the parallel VID

codes. In AM2+, CORE_TYPE is tied to VSS at the package, and VID[1] is driven low via strap to ground. The

processor will issue the serial VID codes. CORE_TYPE is also connected to the F75125 to indicate which kind of

VID codes will be decoded.

6.7 Voltage Sense Input/ Voltage Sense Output

The Voltage Sense Input (VSI) and Voltage Sense Output (VSO) are designed for another option of over voltage,

especially beyond the VID table, 1.55V. Every step of over voltage is 1.5% more of the current voltage. Total tuning

steps are 32 steps, so the maximum tuning range up is to 2.325V.

Figure 4 VSI/VSO function illustration

VSI

VSO

VREF

_

+

F72815

F75125

VSI

VI

_

+

Multi-phase PWM

F75125

VREF

Vout

Vout

Vout=VREF*(1+n*0.01613)

n=0,1,2……31

VSO