参数资料
型号: RPIXP2800BC
厂商: INTEL CORP
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 650 MHz, RISC PROCESSOR, PBGA1356
封装: 37.50 X 37.50 MM, 1 MM PITCH, FCBGA-1356
文件页数: 6/130页
文件大小: 1782K
代理商: RPIXP2800BC
Intel IXP2800 and IXP2850 Network Processors
Electrical Specifications
Datasheet
103
4.4.5.3
PCI AC Specifications
The AC specifications consist of input requirements and output responses. The input requirements
consist of setup and hold times, pulse widths, and high and low times. Output responses are delays
from clock to signal.
The PCI pins support the basic set of PCI electrical specifications in the PCI Local Bus
Specification, Version 2.2*, which describes the PCI I/O protocol and pin AC specifications.
4.4.5.4
PCI Clock Signal AC Parameter Measurements
1. Design requirement. Guaranteed by design.
Table 36. Maximum Loading
Bus Interface
Maximum Number of Loads
Trace Length (inches)
PCI
Four loads at 66-MHz bus frequency
Eight loads at 33-MHz bus frequency
5 to 7
Figure 12. PCI Clock Signal AC Parameter Measurements
Table 37. 66 MHz PCI Clock Signal AC Parameters
Symbol
Parameter
Minimum
Maximum
Unit
Tcyc
PCI_CLK cycle time
15
ns
Thigh
PCI_CLK high time1
1. Not tested. Guaranteed by design.
6—
ns
Tlow
PCI_CLK low time1
6—
ns
PCI_CLK slew rate1, 2
2. 0.2 Vcc33 to 0.6 Vcc33.
1.5
4
V/ns
A9392-01
Tcyc
Tf
Tr
Vt3
Notes:
Vt1 = 0.5 ± VCC 33
Vt2 = 0.4 ± VCC 33
Vt2 = 0.3 ± Vx 33
Vt1
Vt2
Thigh
Tlow
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