Intel Core 2 Quad Q6700 Datasheet download pdf (Page 26)

Electrical Specifications

26 Datasheet

2.6.3.1 GTL+ Front Side Bus Specifications

In most cases, termination resistors are not required as these are integrated into the

processor silicon. See Table 8 for details on which GTL+ signals do not include on-die

termination.

Valid high and low levels are determined by the input buffers by comparing with a

reference voltage called GTLREF. Table 14 lists the GTLREF specifications. The GTL+

reference voltage (GTLREF) should be generated on the system board using high

precision voltage divider circuits.

2.7 Clock Specifications

2.7.1 Front Side Bus Clock (BCLK[1:0]) and Processor Clocking

BCLK[1:0] directly controls the FSB interface speed as well as the core frequency of the

processor. As in previous generation processors, the processor’s core frequency is a

multiple of the BCLK[1:0] frequency. The processor bus ratio multiplier will be set at its

default ratio during manufacturing.

The processor uses a differential clocking implementation. For more information on the

processor clocking, contact your Intel field representative.

Table 14. GTL+ Bus Voltage Definitions

Symbol Parameter Min Typ Max Units Notes

NOTES:

1. Unless otherwise noted, all specifications in this table apply to all processor frequencies.

GTLREF_PU GTLREF pull-up resistor 124 * 0.99 124 124 * 1.01 Ω

2. GTLREF is to be generated from V

by a voltage divider of 1% resistors (one divider for each

GTLEREF land). Refer to the applicable platform design guide for implementation details.

GTLREF_PD GTLREF pull-down resistor 210 * 0.99 210 210 * 1.01 Ω

Termination Resistance 45 50 55 Ω

3. R

is the on-die termination resistance measured at V

/3 of the GTL+ output driver.

COMP[3:0] COMP Resistance 49.40 49.90 50.40 Ω

4. COMP resistance must be provided on the system board with 1% resistors. COMP[3:0] and

COMP8 resistors are to V

COMP8 COMP Resistance 24.65 24.90 25.15 Ω

Table 15. Core Frequency to FSB Multiplier Configuration

Multiplication of System

Core Frequency to FSB

Frequency

Core Frequency

(266 MHz BCLK/

1066 MHz FSB)

Core Frequency

(333 MHz BCLK/

1333 MHz FSB)

Notes

1, 2

NOTES:

1. Individual processors operate only at or below the rated frequency.

2. Listed frequencies are not necessarily committed production frequencies.

1/6 1.60 GHz 2.00 GHz -

1/7 1.87 GHz 2.33 GHz -

1/8 2.13 GHz 2.66 GHz -

1/9 2.40 GHz 3.00 GHz -

1/10 2.66 GHz 3.33 GHz -

1/11 2.93 GHz 3.66 GHz -

1/12 3.20 GHz 4.00 GHz -

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 97 98

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Intel Core 2 Quad Q6700 Datasheet Page 26

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