参数资料
型号: BX80552651
厂商: INTEL CORP
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 3400 MHz, MICROPROCESSOR, PBGA775
封装: FLIP CHIP, LGA-775
文件页数: 34/108页
文件大小: 3283K
代理商: BX80552651
Datasheet
33
Electrical Specifications
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 2-7 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 2-15 lists the GTLREF specifications. The GTL+ reference voltage
(GTLREF) should be generated on the system board using high precision voltage divider circuits.
NOTES:
1. Unless otherwise noted, all specifications in this table apply to all processor frequencies.
2. GTLREF is to be generated from VTT by a voltage divider of 1% resistors (one divider for each GTLREF
land). Refer to the applicable platform design guide for additional implementation details.
3. RTT is the on-die termination resistance measured at VTT/2 of the GTL+ output driver. The IMPSEL pin is
used to select a 50
Ω or 60 Ω buffer and RTT value.
4. COMP resistance must be provided on the system board with 1% resistors. COMP[1:0] resistors are to VSS.
COMP[5:4] resistors are to VTT.
5. These pull-ups are to VTT.
Table 2-15. GTL+ Bus Voltage Definitions
Symbol
Parameter
Min
Typ
Max
Units
Notes1
GTLREF_PU
GTLREF pull up resistor
124 * 0.99
124
124 * 1.01
Ω
2
GTLREF_PD
GTLREF pull down resistor
210 * 0.99
210
210 * 1.01
Ω
2
RPULLUP
On die pull-up for BOOTSELECT
signal
500
5000
Ω
5
RTT
60
Ω Platform Termination Resistance
51
60
66
Ω
3
50
Ω Platform Termination Resistance
42
50
55
Ω
3
COMP[1:0]
60
Ω Platform Termination
COMP Resistance
59.8
60.4
61
Ω
4
50
Ω Platform Termination
COMP Resistance
49.9 * 0.99
49.9
49.9 * 1.01
Ω
4
COMP[5:4]
60
Ω Platform Termination
COMP Resistance
59.8
60.4
61
Ω
4
50
Ω Platform Termination
COMP Resistance
49.9 * 0.99
49.9
49.9 * 1.01
Ω
4
相关PDF资料
PDF描述
BX80552651T 32-BIT, 3400 MHz, MICROPROCESSOR, PBGA775
BX80552661 32-BIT, 3600 MHz, MICROPROCESSOR, PBGA775
BX80552651T2 32-BIT, 3400 MHz, MICROPROCESSOR, PBGA775
BX80552641T 32-BIT, 3200 MHz, MICROPROCESSOR, PBGA775
BX80552641T2 32-BIT, 3200 MHz, MICROPROCESSOR, PBGA775
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