參數(shù)資料
型號(hào): M4-256/128-15YC
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, 15 ns, PQFP208
封裝: PLASTIC, QFP-208
文件頁(yè)數(shù): 5/46頁(yè)
文件大?。?/td> 754K
代理商: M4-256/128-15YC
MACH 4 Family
13
A reset/preset swapping feature in each macrocell allows for reset and preset to be exchanged,
providing exibility. In asynchronous mode (Figure 8), a single individual product term is
provided for initialization. It can be selected to control reset or preset.
Note that the reset/preset swapping selection feature effects power-up reset as well. The
initialization functionality of the ip-ops is illustrated in Table 9. The macrocell sends its data
to the output switch matrix and the input switch matrix. The output switch matrix can route this
data to an output if so desired. The input switch matrix can send the signal back to the central
switch matrix as feedback.
Note:
1. Transparent latch is unaffected by AR, AP
Table 9. Asynchronous Reset/Preset Operation
AR
AP
CLK/LE1
Q+
00X
See Table 8
01X1
10X0
11X0
Power-Up
Reset
AP
D/L/T
AR
Q
Individual
Reset
Product Term
a. Reset
Power-Up
Preset
AP
D/L/T
AR
Q
Individual
Preset
Product Term
b. Preset
17466G-014
17466G-015
Figure 8. Asynchronous Mode Initialization Congurations
相關(guān)PDF資料
PDF描述
M4-256/128-18YI High Performance E 2 CMOS In-System Programmable Logic
M4-256/128-7YC High Performance E 2 CMOS In-System Programmable Logic
M4-32/32-12JC High Performance E 2 CMOS In-System Programmable Logic
M4-32/32-12JI High Performance E 2 CMOS In-System Programmable Logic
M4-32/32-12VC High Performance E 2 CMOS In-System Programmable Logic
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