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| 型號： | LC5256MB-5FN256C |
| 廠商： | Lattice Semiconductor Corporation |
| 文件頁數(shù)： | 5/99頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CPLD 256MACROCELLS 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： | 0°C ~ 90°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 |
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Lattice Semiconductor
ispXPLD 5000MX Family Data Sheet
9
Table 4. MFB Memory Configuration
Input and Output
The data input and control signals to a MFB in memory mode are generated from inputs from the routing. Data sig-
nals are only available in the true non-inverted format. True or complemented versions of the inputs are available
for generating the control signals. Data and flag outputs are fed from the MFB to the GRP and OSA. Unused inputs
and outputs are not accessible in memory mode.
ROM Operation
In each of the memory modes it is possible to specify the power-on state of each bit in the memory array. This
allows the memory to be used as ROM if desired.
Increased Depth And Width
Designs that require a memory depth or width that is greater than that support by a single MFB can be supported
by cascading multiple blocks. For dual port, single port, and pseudo dual port modes additional width is easily pro-
vided by sharing address lines. Additional depth is supported by multiplexing the RAM output. For FIFO and CAM
modes additional width is supported through the cascading of MFBs.
The Lattice design tools automatically combine blocks to support the memory size specified in the user’s design.
Bus Size Matching
All of the memory modes apart from CAM mode support different widths on each of the ports. The RAM bits are
mapped LSB word 0 to MSB word 0, LSB word 1 to MSB word 1 and so on. Although the word size and number of
words for each port varies this mapping scheme applies to each port.
Memory Mode
Max. Configuration
Size
1
Dual-port
8,192 x 1
4,096 x 2
2,048 x 4
1,024 x 8
512 x 16
Single-port, Pseudo Dual Port, FIFO
16,384 x1
8,192 x 2
4,096 x 4
2,048 x 8
1,024 x 16
512 x 32
CAM
128 x 48
1. Smaller configurations are possible.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| LC5256MB-5FN256I | 功能描述:CPLD - 復(fù)雜可編程邏輯器件 PROGRAM EXPANDED LOG RoHS:否 制造商:Lattice 系列: 存儲類型:EEPROM 大電池數(shù)量:128 最大工作頻率:333 MHz 延遲時間:2.7 ns 可編程輸入/輸出端數(shù)量:64 工作電源電壓:3.3 V 最大工作溫度:+ 90 C 最小工作溫度:0 C 封裝 / 箱體:TQFP-100 |
| LC5256MB-5FN484C | 制造商:LATTICE 制造商全稱:Lattice Semiconductor 功能描述:3.3V, 2.5V and 1.8V In-System Programmable eXpanded Programmable Logic Device XPLD⑩ Family |
| LC5256MB-5FN484I | 制造商:LATTICE 制造商全稱:Lattice Semiconductor 功能描述:3.3V, 2.5V and 1.8V In-System Programmable eXpanded Programmable Logic Device XPLD⑩ Family |
| LC5256MB-5FN672C | 制造商:LATTICE 制造商全稱:Lattice Semiconductor 功能描述:3.3V, 2.5V and 1.8V In-System Programmable eXpanded Programmable Logic Device XPLD⑩ Family |
| LC5256MB-5FN672I | 制造商:LATTICE 制造商全稱:Lattice Semiconductor 功能描述:3.3V, 2.5V and 1.8V In-System Programmable eXpanded Programmable Logic Device XPLD⑩ Family |
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