參數(shù)資料
型號(hào)： LC5256MB-5F256I
廠商： Lattice Semiconductor Corporation
文件頁數(shù)： 8/99頁
文件大?。?/td> 0K
描述： IC XPLD 256MC 5NS 256FPBGA
標(biāo)準(zhǔn)包裝： 90
系列： ispXPLD® 5000MB
可編程類型： 系統(tǒng)內(nèi)可編程
最大延遲時(shí)間 tpd(1)： 5.0ns
電壓電源 - 內(nèi)部： 2.3 V ~ 2.7 V
邏輯元件/邏輯塊數(shù)目： 8
宏單元數(shù)： 256
輸入/輸出數(shù)： 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(yīng)商設(shè)備封裝： 256-FPBGA（17x17）
包裝： 托盤
Lattice Semiconductor
ispXPLD 5000MX Family Data Sheet
12
Single-Port SRAM Mode
In Single-Port SRAM Mode the multi-function array is configured as a single-port SRAM. In this mode one ports
accesses 16,384-bits of memory. Data widths of 1, 2, 4, 8, 16 and 32 are supported by the MFB. Figure 11 shows
the block diagram of the single-port SRAM.
Write data, address, chip select and read/write signals are always synchronous (registered.) The output data sig-
nals can be synchronous or asynchronous. Reset is asynchronous. All signals share a common clock, clock
enable, and reset. Table 7 shows the possible sources for the clock, clock enable and reset signals.
Figure 11. Single-Port SRAM Block Diagram
Table 7. Register Clock, Clock Enable, and Reset in Single-Port SRAM Mode
Register
Input
Source
Address, Write Data,
Read Data, Read/
Write, and Chip
Select
Clock
CLK or one of the global clocks (CLK0 - CLK3). Each of these signals can
be inverted if required.
Clock Enable
CEN or one of the global clocks (CLK1 - CLK 2). Each of these signals can
be inverted if required.
Reset
Created by the logical OR of the global reset signal and RST. RST is routed
by the multifunction array from GRP, with inversion if desired.
‘
68 Inputs
from
Routing
RESET
CLK0
CLK3
CLK1
CLK2
16,384-Bit
SRAM
Array
Clock (CLK)
Read/Write Address
(AD[0-8:13])
Write/Read (WR)
Chip Select (CS0,1)
Reset (RST)
Clk Enable (CEN)
Write Data
(DI[0-0,1,3,7,15,31])
Read Data
(DO[0-0,31])
SELECT
DEVICES
DISCONTINUED
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