参数资料
型号: LCMXO640C-5T144C
厂商: Lattice Semiconductor Corporation
文件页数: 14/88页
文件大小: 0K
描述: IC PLD 640LUTS 113I/O 144-TQFP
标准包装: 60
系列: MachXO
可编程类型: 系统内可编程
最大延迟时间 tpd(1): 3.5ns
电压电源 - 内部: 1.71 V ~ 3.465 V
宏单元数: 320
输入/输出数: 113
工作温度: 0°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 144-LQFP
供应商设备封装: 144-TQFP(20x20)
包装: 托盘
Architecture
MachXO Family Data Sheet
Bus Size Matching
All of the multi-port memory modes 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.
RAM Initialization and ROM Operation
If desired, the contents of the RAM can be pre-loaded during device configuration. By preloading the RAM block
during the chip configuration cycle and disabling the write controls, the sysMEM block can also be utilized as a
ROM.
Memory Cascading
Larger and deeper blocks of RAMs can be created using EBR sysMEM Blocks. Typically, the Lattice design tools
cascade memory transparently, based on specific design inputs.
Single, Dual, Pseudo-Dual Port and FIFO Modes
Figure 2-12 shows the five basic memory configurations and their input/output names. In all the sysMEM RAM
modes, the input data and address for the ports are registered at the input of the memory array. The output data of
the memory is optionally registered at the memory array output.
Figure 2-12. sysMEM Memory Primitives
AD[12:0]
DI[35:0]
CLK
CE
RST
EBR
DO[35:0]
ADA[12:0]
DIA[17:0]
CLKA
CEA
RSTA
WEA
EBR
ADB[12:0]
DIB[17:0]
CEB
CLKB
RSTB
WEB
WE
CS[2:0]
AD[12:0]
Single Port RAM
CSA[2:0]
DOA[17:0]
ADW[12:0]
DI[35:0]
True Dual Port RAM
CSB[2:0]
DOB[17:0]
ADR[12:0]
CLK
CE
RST
CS[2:0]
EBR
DO[35:0]
CLKW
CEW
WE
RST
CS[2:0]
EBR
DO[35:0]
CER
CLKR
ROM
Pseudo-Dual Port RAM
DO[35:0]
DI[35:0]
CLKW
RSTA
WE
CEW
EBR
CLKR
RSTB
RE
RCE
FF
AF
EF
AE
FIFO
2-11
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