參數(shù)資料
型號: LFEC20E-5F672C
廠商: Lattice Semiconductor Corporation
文件頁數(shù): 94/163頁
文件大?。?/td> 0K
描述: IC FPGA 19.7KLUTS 400I/O 672-BGA
標準包裝: 40
系列: EC
邏輯元件/單元數(shù): 19700
RAM 位總計: 434176
輸入/輸出數(shù): 400
電源電壓: 1.14 V ~ 1.26 V
安裝類型: 表面貼裝
工作溫度: 0°C ~ 85°C
封裝/外殼: 672-BBGA
供應商設備封裝: 672-FPBGA(27x27)
其它名稱: 220-1288
LFEC20E-5F672C-ND
2-33
Architecture
LatticeECP/EC Family Data Sheet
Oscillator
Every LatticeECP/EC device has an internal CMOS oscillator which is used to derive a master clock for configura-
tion. The oscillator and the master clock run continuously. The default value of the master clock is 2.5MHz. Table 2-
15 lists all the available Master Clock frequencies. When a different Master Clock is selected during the design pro-
cess, the following sequence takes place:
1.
User selects a different Master Clock frequency.
2.
During configuration the device starts with the default (2.5MHz) Master Clock frequency.
3.
The clock configuration settings are contained in the early configuration bit stream.
4.
The Master Clock frequency changes to the selected frequency once the clock configuration bits are received.
For further information about the use of this oscillator for configuration, please see the list of technical documenta-
tion at the end of this data sheet.
Table 2-15. Selectable Master Clock (CCLK) Frequencies During Configuration
Density Shifting
The LatticeECP/EC family has been designed to ensure that different density devices in the same package have
the same pin-out. Furthermore, the architecture ensures a high success rate when performing design migration
from lower density parts to higher density parts. In many cases, it is also possible to shift a lower utilization design
targeted for a high-density device to a lower density device. However, the exact details of the final resource utiliza-
tion will impact the likely success in each case.
CCLK (MHz)
2.5*
13
45
4.3
15
51
5.4
20
55
6.9
26
60
8.1
30
130
9.2
34
10.0
41
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