參數(shù)資料
型號: M4A3-32/32-7JC
廠商: LATTICE SEMICONDUCTOR CORP
元件分類: PLD
英文描述: High Performance E 2 CMOS In-System Programmable Logic
中文描述: EE PLD, 7.5 ns, PQCC44
封裝: PLASTIC, LCC-44
文件頁數(shù): 56/62頁
文件大小: 1078K
代理商: M4A3-32/32-7JC
6
ispMACH 4A Family
Table 4. Architectural Summary of ispMACH 4A devices
The Macrocell-I/O cell ratio is defined as the number of macrocells versus the number of I/O cells
internally in a PAL block (Table 4).
The central switch matrix takes all dedicated inputs and signals from the input switch matrices and routes
them as needed to the PAL blocks. Feedback signals that return to the same PAL block still must go through
the central switch matrix. This mechanism ensures that PAL blocks in ispMACH 4A devices communicate
with each other with consistent, predictable delays.
The central switch matrix makes a ispMACH 4A device more advanced than simply several PAL devices on
a single chip. It allows the designer to think of the device not as a collection of blocks, but as a single
programmable device; the software partitions the design into PAL blocks through the central switch matrix
so that the designer does not have to be concerned with the internal architecture of the device.
Each PAL block consists of:
Product-term array
Logic allocator
Macrocells
Output switch matrix
I/O cells
Input switch matrix
Clock generator
Notes:
1. M4A3-64/64 internal switch matrix functionality embedded in central switch matrix.
ispMACH 4A Devices
M4A3-64/32, M4A5-64/32
M4A3-96/48, M4A5-96/48
M4A3-128/64, M4A5-128/64
M4A3-192/96, M4A5-192/96
M4A3-256/128, M4A5-256/128
M4A3-384
M4A3-512
M4A3-32/32
M4A5-32/32
M4A3-64/64
M4A3-256/160
M4A3-256/192
Macrocell-I/O Cell Ratio
2:1
1:1
Input Switch Matrix
Yes
Yes1
Input Registers
Yes
No
Central Switch Matrix
Yes
Output Switch Matrix
Yes
相關(guān)PDF資料
PDF描述
M4A3-32/32-7JI High Performance E 2 CMOS In-System Programmable Logic
M4A3-32/32-7VC High Performance E 2 CMOS In-System Programmable Logic
M4A3-32/32-7VI High Performance E 2 CMOS In-System Programmable Logic
M4A3-64/32-55JC High Performance E 2 CMOS In-System Programmable Logic
M4A3-64/32-55VC High Performance E 2 CMOS In-System Programmable Logic
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