Intel 366 MHz 80524RX366128 Data Sheet

126

 through 

 list attributes of the Celeron processor output, input, and I/O signals.

V

COREDET

(PGA packages 
only)

O

The V

COREDET

 signal will float for 2.0 V core processors and will be grounded for the 

Celeron

®

 FC-PGA/FC-PGA2 processor with a 1.5V core voltage.

VID[4:0] 
(S.E.P.P.)

VID[3:0] 
(PGA packages 
only)

O

The VID (Voltage ID) pins can be used to support automatic selection of power 
supply voltages. These pins are not signals, but are either an open circuit or a short 
circuit to V

SS

 on the processor. The combination of opens and shorts defines the 

voltage required by the processor. The VID pins are needed to cleanly support 
voltage specification variations on Intel Celeron processors. See 

 for 

definitions of these pins. The power supply must supply the voltage that is requested 
by these pins, or disable itself.

V

REF

[7:0] 

(PGA packages 
only)

I

These input signals are used by the AGTL+ inputs as a reference voltage. AGTL+ 
inputs are differential receivers and will use this voltage to determine whether the 
signal is a logic high or logic low. 

For the FC-PGA/FC-PGA2 packages, V

REF

 is typically 2/3 of V

TT

CPUPRES# (PGA 

packages only)

Low

Asynch

Power/Other

FERR#

Low

Asynch

CMOS Output

IERR#

Low

Asynch

CMOS Output

PRDY#

Low

BCLK

AGTL+ Output

SLOTOCC# 

(S.E.P.P. only)

Low

Asynch

Power/Other

TDO

High

TCK

TAP Output

THERMDN

N/A

Asynch

Power/Other

THERMTRIP#

Low

Asynch

CMOS Output

V

COREDET

(PGA packages only)

High

Asynch

Power/Other

VID[4:0] (S.E.P.P.)

VID[3:0] (PGA 

packages)

High

Asynch

Power/Other