參數(shù)資料
型號(hào): MCF54454VR266
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 266 MHz, RISC PROCESSOR, PBGA360
封裝: 23 X 23 MM, ROHS COMPLIANT, TEPBGA-360
文件頁數(shù): 20/48頁
文件大?。?/td> 945K
代理商: MCF54454VR266
Electrical Characteristics
MCF5445x ColdFire Microprocessor Data Sheet, Rev. 6
Freescale Semiconductor
27
Figure 12. DDR Read Timing
5.9
PCI Bus Timing Specifications
The PCI bus on the device is PCI 2.2 compliant. The following timing numbers are mostly from the PCI 2.2 spec. Refer to the
PCI 2.2 spec for a more detailed timing analysis.
Table 14. PCI Timing Specifications1,2
Num
Characteristic
33 MHz3
66 MHz3
Min
Max
Min
Max
Unit
Frequency of Operation
33.33
66.66
MHz
P1
Clock Period
30
15
30
ns
P2
Bused PCI signals — input setup
7.0
3.0
ns
P3
PCI_GNT[3:0]/PCI_REQ[3:0] — input setup
10.0
5.0
ns
P4
All PCI signals — input hold
0
0
ns
P5
Bused PCI signals — output valid
11.0
6.0
ns
SD_CLK
SD_CSn,SD_WE,
SD_DQS3/SD_DQS2
D[31:24]/D[23:16]
SD_A[13:0]
SD_RAS, SD_CAS
CMD
ROW
DD1
DD5
DD4
WD1WD2WD3WD4
SD_DQS3/SD_DQS2
DD9
SD_CLK
DD3
DD2
D[31:24]/D[23:16]
WD1 WD2 WD3 WD4
DD10
CL=2
CL=2.5
COL
DQS Read
Preamble
DQS Read
Postamble
DQS Read
Preamble
DQS Read
Postamble
CL
=
2.
5
CL
=
2
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