参数资料
型号: B80547RE061256
厂商: INTEL CORP
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 2530 MHz, MICROPROCESSOR, PBGA775
封装: FLIP CHIP, LGA-775
文件页数: 25/94页
文件大小: 2796K
代理商: B80547RE061256
Datasheet
31
Electrical Specifications
2.13
GTL+ FSB Specifications
Termination resistors are not required for most GTL+ signals, as these are integrated into the
processor silicon.
Valid high and low levels are determined by the input buffers which compare a signal’s voltage
with a reference voltage called GTLREF.
Table 2-17 lists the GTLREF specifications. The GTL+ reference voltage (GTLREF) should be
generated on the system board using high precision voltage divider circuits.
§
Table 2-17. GTL+ Bus Voltage Definitions
Symbol
Parameter
Min
Typ
Max
Units
Notes1
NOTES:
1.
Unless otherwise noted, all specifications in this table apply to all processor frequencies.
GTLREF
Bus Reference
Voltage
(0.98 * 0.67) * VTT 0.67 * VTT (1.02 * 0.67) * VTT
V
2, 3, 4
2.
The tolerances for this specification have been stated generically to enable the system designer to calculate the minimum
and maximum values across the range of VTT.
3.
GTLREF should be generated from VTT by a voltage divider of 1% resistors or 1% matched resistors.
4.
The VTT referred to in these specifications is the instantaneous VTT.
RPULLUP
On die pullup for
BOOTSELECT
signal
500
5000
Ω
5
5.
These pull-ups are to VTT.
RTT
Termination
Resistance
54
60
66
Ω
6
6.
RTT is the on-die termination resistance measured at VTT/2 of the GTL+ output driver.
COMP[1:0]
COMP Resistance
59.8
60.4
61
Ω
7
7.
COMP resistance must be provided on the system board with 1% resistors. COMP[1:0] resistors are to VSS. COMP[3:2]
resistors are to VTT. COMP[5:4] resistors are to VTT.
COMP[3:2]
COMP Resistance
99
100
101
Ω
COMP[5:4]
COMP Resistance
59.8
60.4
61
Ω
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