參數(shù)資料
型號: MPC8275VR
廠商: Motorola, Inc.
英文描述: PowerQUICC II Family Hardware Specifications
中文描述: 的PowerQUICC II系列硬件規(guī)格
文件頁數(shù): 19/76頁
文件大小: 496K
代理商: MPC8275VR
MOTOROLA
MPC8280 PowerQUICC II Family Hardware Specifications
19
AC Electrical Characteristics
6.2
SIU AC Characteristics
NOTE: CLKIN Jitter and Duty Cycle
The CLKIN input to the MPC8280 should not exceed +/– 150 psec. This
represents total input jitter—the combination of short term (peak-to-peak)
and long term (cumulative). The duty cycle of CLKIN should not exceed
the ratio of 40:60.
NOTE: PCI AC Timing
The MPC8280 meets the timing requirements of
PCI Specification
Revision 2.2
. Refer to Sections 7.2 and 7.3 and “Note: Tval (Output Hold)”
to determine if a specific clock configuration is compliant.
Table 11 lists SIU input characteristics.
Table 11. AC Characteristics for SIU Inputs
1
1
Input specifications are measured from the 50% level of the signal to the 50% level of the rising edge of CLKIN. Timings
are measured at the pin.
Spec Number
Characteristic
Value (ns)
Setup
Hold
Setup
Hold
66 MHz
83 MHz 100 MHz 66 MHz
83 MHz 100 MHz
sp11
sp10 AACK/TA/TS/DBG/BG/BR
6
5
3.5
0.5
0.5
0.5
sp11a
sp10 ARTRY/ TEA
6
5
4
0.5
0.5
0.5
sp12
sp10 Data bus in normal mode
5
4
3.5
0.5
0.5
0.5
sp13
sp10 Data bus in ECC and PARITY modes
7
5
3.5
0.5
0.5
0.5
sp13a
sp10 Pipeline mode—
Data bus in ECC and PARITY modes
5
4
2.5
0.5
0.5
0.5
sp14
sp10 DP pins
7
5
3.5
0.5
0.5
0.5
sp14a
sp10 Pipeline mode—DP pins
4
2.5
0.5
0.5
sp15
sp10 All other pins
5
4
3.5
0.5
0.5
0.5
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