Figure 2-16. Memory Core Reset For further information about sysMEM EBR block, please see the" />
參數(shù)資料
型號: LFEC1E-4TN144I
廠商: Lattice Semiconductor Corporation
文件頁數(shù): 73/163頁
文件大小: 0K
描述: IC FPGA 1.5KLUTS 144TQFP
標(biāo)準(zhǔn)包裝: 60
系列: EC
邏輯元件/單元數(shù): 1500
RAM 位總計: 18432
輸入/輸出數(shù): 97
電源電壓: 1.14 V ~ 1.26 V
安裝類型: 表面貼裝
工作溫度: -40°C ~ 100°C
封裝/外殼: 144-LQFP
供應(yīng)商設(shè)備封裝: 144-TQFP(20x20)
2-14
Architecture
LatticeECP/EC Family Data Sheet
Figure 2-16. Memory Core Reset
For further information about sysMEM EBR block, please see the the list of technical documentation at the end of
this data sheet.
EBR Asynchronous Reset
EBR asynchronous reset or GSR (if used) can only be applied if all clock enables are low for a clock cycle before the
reset is applied and released a clock cycle after the reset is released, as shown in Figure 2-17. The GSR input to the
EBR is always asynchronous.
Figure 2-17. EBR Asynchronous Reset (Including GSR) Timing Diagram
If all clock enables remain enabled, the EBR asynchronous reset or GSR may only be applied and released after
the EBR read and write clock inputs are in a steady state condition for a minimum of 1/fMAX (EBR clock). The reset
release must adhere to the EBR synchronous reset setup time before the next active read or write clock edge.
If an EBR is pre-loaded during configuration, the GSR input must be disabled or the release of the GSR during
device Wake Up must occur before the release of the device I/Os becomes active.
These instructions apply to all EBR RAM and ROM implementations.
Note that there are no reset restrictions if the EBR synchronous reset is used and the EBR GSR input is disabled.
sysDSP Block
The LatticeECP-DSP family provides a sysDSP block, making it ideally suited for low cost, high performance Digital
Signal Processing (DSP) applications. Typical functions used in these applications are Finite Impulse Response
(FIR) filters; Fast Fourier Transforms (FFT) functions, correlators, Reed-Solomon/Turbo/Convolution encoders and
Q
SET
D
LCLR
Output Data
Latches
Memory Core
Port A[17:0]
Q
SET
D
Port B[17:0]
RSTB
GSRN
Programmable Disable
RSTA
LCLR
Reset
Clock
Enable
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