參數資料
型號: LC5256MB-5F256I
廠商: Lattice Semiconductor Corporation
文件頁數: 13/99頁
文件大小: 0K
描述: IC XPLD 256MC 5NS 256FPBGA
標準包裝: 90
系列: ispXPLD® 5000MB
可編程類型: 系統(tǒng)內可編程
最大延遲時間 tpd(1): 5.0ns
電壓電源 - 內部: 2.3 V ~ 2.7 V
邏輯元件/邏輯塊數目: 8
宏單元數: 256
輸入/輸出數: 141
工作溫度: -40°C ~ 105°C
安裝類型: 表面貼裝
封裝/外殼: 256-BGA
供應商設備封裝: 256-FPBGA(17x17)
包裝: 托盤
Lattice Semiconductor
ispXPLD 5000MX Family Data Sheet
16
Figure 15. PLL Block Diagram
Figure 16. Connection of Optional PLL Inputs and Outputs
In order to facilitate the multiply and divide capabilities of the PLL, each PLL has dividers associated with it: M, N
and K. The M divider is used to divide the clock signal, while the N divider is used to multiply the clock signal. The
K divider is only used when a secondary clock output is needed. This divider divides the primary clock output and
feeds to a separate global clock net. The V divider is used to provide lower frequency output clocks, while maintain-
ing a stable, high frequency output from the PLL’s VCO circuit. The PLL also has a delay feature that allows the out-
put clock to be advanced or delayed to improve set-up and clock-to-out times for better performance. For more
information on the PLL, please refer to TN1003, sysCLOCK PLL Usage Guide for ispXPGA, ispGDX2, ispXPLD
SEC_OUT
CLK_OUT
PLL_LOCK
CLK_IN
PLL_RST
PLL_FBK
Input Clock
(M) Divider
Post-scalar
(V) Divider
VCO
and
Phase
Detector
Programable
Delay
Secondary
Clock
(K) Divider
Feedback
Loop
(N) Divider
Clock Net
PLL_LOCK
To GRP
CLK_OUT
From Macrocell
To GRP
PLL_RST
From Macrocell
To GRP
PLL_FBK
From Macrocell
I/O Pin*
*See pinout table for details
SELECT
DEVICES
DISCONTINUED
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