Intel E2140 BX80557E2140 Data Sheet

Datasheet

27

1.

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

GTLREF_PU

GTLREF pull up resistor on 
Intel 975X and 96x Express 
Chipset family boards

124 * 0.99

124

124 * 1.01

Ω

2

2. GTLREF is to be generated from V

TT

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

GTLEREF land). 

GTLREF_PD

GTLREF pull down resistor 
on Intel 975X and 96x 
Express Chipset family 
boards

210 * 0.99

210

210 * 1.01

Ω

GTLREF_PU

GTLREF pull up resistor on 
Intel Series 3 Express 
Chipset family boards

100 * 0.99

100

100 * 1.01

Ω

GTLREF_PD

GTLREF pull down resistor 
on Intel Series 3 Express 
Chipset family boards

200 * 0.99

200

200 * 1.01

Ω

R

TT

Termination Resistance

45

50

55

Ω

3

3. R

TT

 is the on-die termination resistance measured at V

TT

/3 of the GTL+ output driver. 

COMP[3:0]

COMP Resistance

49.40

49.90

50.40

Ω

4

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

COMP8 resistors are to V

SS

.

COMP8

COMP Resistance

24.65

24.90

25.15

Ω