參數(shù)資料
型號: M4A3-256/128-10VI
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, 10 ns, PQFP176
封裝: TQFP-176
文件頁數(shù): 60/61頁
文件大?。?/td> 1169K
代理商: M4A3-256/128-10VI
8
MACH 4 Family
Table 7. Architectural Summary of MACH 4 devices
Table 8. Architectural Summary of MACH 4A devices
The Macrocell-I/O cell ratio is dened as the number of macrocells versus the number of I/O
cells internally in a PAL block (Tables 7 and 8).
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 MACH
4 devices communicate with each other with consistent, predictable delays.
The central switch matrix makes a MACH 4 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.
MACH 4A Devices
M4-64/32, M4LV-64/32
M4-96/48, M4LV-96/48
M4-128/64, M4LV-128/64
M4-128N/64, M4LV-128N/64
M4-192/96, M4LV-192/96
M4-256/128, M4LV-256/128
M4-32/32
M4LV-32/32
Macrocell-I/O Cell
Ratio
2:1
1:1
Input Switch Matrix
Yes
Input Registers
Yes
No
Central Switch Matrix
Yes
Output Switch Matrix
Yes
MACH 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
M4A3-256/160
M4A3-256/192
Macrocell-I/O Cell
Ratio
2:1
1:1
Input Switch Matrix
Yes
Input Registers
Yes
No
Central Switch Matrix
Yes
Output Switch Matrix
Yes
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