Fsb Frequency Select Signals (Bsel[2:0]); Phase Lock Loop (Pll) And Filter; Bclk[1:0] Specifications; Bsel[2:0] Frequency Table For Bclk[1:0] - Intel E8200 - Cpu Core 2 Duo 2.66Ghz Fsb1333Mhz 6M Lga775 Tray Datasheet

2.8.2

FSB Frequency Select Signals (BSEL[2:0])

The BSEL[2:0] signals are used to select the frequency of the processor input clock
(BCLK[1:0]).
frequency associated with each combination. The required frequency is determined by
the processor, chipset, and clock synthesizer. All agents must operate at the same
frequency.
The Intel
1066 MHz FSB frequency (selected by a 333 MHz BCLK[1:0] or 266 MHz BCLK[1:0]
frequency). The Intel
FSB frequency (selected by a 333 MHz BCLK[1:0] frequency). Individual processors will
only operate at their specified FSB frequency.
For more information about these signals, refer to
Table 17.

BSEL[2:0] Frequency Table for BCLK[1:0]

BSEL2
L
L
L
L
H
H
H
H
2.8.3

Phase Lock Loop (PLL) and Filter

An on-die PLL filter solution will be implemented on the processor. The VCCPLL input is
used for the PLL. Refer to
2.8.4

BCLK[1:0] Specifications

Table 18.

Front Side Bus Differential BCLK Specifications

Symbol
V
L
V
H
V
CROSS(abs)
ΔV
CROSS
V
OS
V
US
V
SWING
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all processor frequencies.
2. Crossing voltage is defined as the instantaneous voltage value when the rising edge of
BCLK0 equals the falling edge of BCLK1.
3. "Steady state" voltage, not including overshoot or undershoot.
32
Table 17 defines the possible combinations of the signals and the
®
Core™2 Duo processor E7000 series operates at a 1333 MHz FSB and
®
Core™2 Duo processor E8000 series operates at a 1333 MHz
BSEL1
L
L
H
H
H
H
L
L
Table 4
Parameter
Input Low Voltage
Input High Voltage
Absolute Crossing Point
Range of Crossing Points
Overshoot
Undershoot
Differential Output Swing
Section
BSEL0 FSB Frequency
L 266 MHz
H Reserved
H Reserved
L Reserved
L Reserved
H Reserved
H Reserved
L 333 MHz
for DC specifications.
Min Typ
-0.30 N/A
N/A N/A
0.300 N/A
N/A N/A
N/A N/A
-0.300 N/A
0.300 N/A
Electrical Specifications
4.2.
Max Unit Figure
N/A V 4
1.15 V 4
0.550 V 4
0.140 V 4
1.4 V 4
N/A V 4
N/A V 5
1
Notes
2
-
3
3
4
Datasheet