EP2C8 datasheet(35/168 Pages) ALTERA

Nome de Peças	EP2C8

Descrição Electrónicos	Section I. Cyclone II Device Family Data Sheet

PDF	168 Pages

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Fabricante Electrônico	ALTERA [Altera Corporation]

Página de início	http://www.altera.com

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35 / 168 page

Altera Corporation

2–23

February 2007

Cyclone II Device Handbook, Volume 1

Cyclone II Architecture

Global Clock Network Distribution

Cyclone II devices contains 16 global clock networks. The device uses

multiplexers with these clocks to form six-bit buses to drive column IOE

clocks, LAB row clocks, or row IOE clocks (see Figure 2–14). Another

multiplexer at the LAB level selects two of the six LAB row clocks to feed

the LE registers within the LAB.

Figure 2–14. Global Clock Network Multiplexers

LAB row clocks can feed LEs, M4K memory blocks, and embedded

multipliers. The LAB row clocks also extend to the row I/O clock regions.

IOE clocks are associated with row or column block regions. Only six

global clock resources feed to these row and column regions. Figure 2–15

shows the I/O clock regions.

Clock [15 or 7..0]

Row I/O Region

IO_CLK [5..0]

Column I/O Region

IO_CLK [5..0]

LAB Row Clock

LABCLK[5..0]

Global Clock

Network

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