参数资料
型号: LC4256B-5FN256AI
厂商: Lattice Semiconductor Corporation
文件页数: 9/99页
文件大小: 0K
描述: IC PLD 256MC 128I/O 5NS 256FPBGA
标准包装: 90
系列: ispMACH® 4000B
可编程类型: 系统内可编程
最大延迟时间 tpd(1): 5.0ns
电压电源 - 内部: 2.3 V ~ 2.7 V
逻辑元件/逻辑块数目: 16
宏单元数: 256
输入/输出数: 160
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 256-BGA
供应商设备封装: 256-FPBGA(17x17)
包装: 托盘
Lattice Semiconductor
ispMACH 4000V/B/C/Z Family Data Sheet
Output Routing Pool (ORP)
The Output Routing Pool allows macrocell outputs to be connected to any of several I/O cells within an I/O block.
This provides greater flexibility in determining the pinout and allows design changes to occur without affecting the
pinout. The output routing pool also provides a parallel capability for routing macrocell-level OE product terms. This
allows the OE product term to follow the macrocell output as it is switched between I/O cells. Additionally, the out-
put routing pool allows the macrocell output or true and complement forms of the 5-PT bypass signal to bypass the
output routing multiplexers and feed the I/O cell directly. The enhanced ORP of the ispMACH 4000 family consists
of the following elements:
? Output Routing Multiplexers
? OE Routing Multiplexers
? Output Routing Pool Bypass Multiplexers
Figure 7 shows the structure of the ORP from the I/O cell perspective. This is referred to as an ORP slice. Each
ORP has as many ORP slices as there are I/O cells in the corresponding I/O block.
Figure 7. ORP Slice
OE Routing Multiplexer
From PTOE
5-PT Fast Path
From Macrocell
ORP
Bypass
Multiplexer
OE
To I/O
Cell
To I/O
Cell
Output
Output Routing Multiplexer
Output Routing Multiplexers
The details of connections between the macrocells and the I/O cells vary across devices and within a device
dependent on the maximum number of I/Os available. Tables 5-9 provide the connection details.
Table 6. ORP Combinations for I/O Blocks with 8 I/Os
I/O Cell
I/O 0
I/O 1
I/O 2
I/O 3
I/O 4
I/O 5
I/O 6
I/O 7
Available Macrocells
M0, M1, M2, M3, M4, M5, M6, M7
M2, M3, M4, M5, M6, M7, M8, M9
M4, M5, M6, M7, M8, M9, M10, M11
M6, M7, M8, M9, M10, M11, M12, M13
M8, M9, M10, M11, M12, M13, M14, M15
M10, M11, M12, M13, M14, M15, M0, M1
M12, M13, M14, M15, M0, M1, M2, M3
M14, M15, M0, M1, M2, M3, M4, M5
9
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