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EPM240T100C5N Datasheet

  • EPM240T100C5N

  • MAX II ISP CPLD 240, TQFP100, 240; CPLD Type:FLASH; No. of M...

  • 1035.40KB

  • 101頁

  • Altera   Altera

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Chapter 2: MAX II Architecture
Logic Array Blocks
2鈥?
Figure 2鈥?.
DirectLink Connection
DirectLink interconnect from
left LAB or IOE output
DirectLink interconnect from
right LAB or IOE output
LE0
LE1
LE2
LE3
LE4
DirectLink
interconnect
to left
Local
Interconnect
LE5
LE6
LE7
LE8
LE9
Logic Element
LAB
DirectLink
interconnect
to right
LAB Control Signals
Each LAB contains dedicated logic for driving control signals to its LEs. The control
signals include two clocks, two clock enables, two asynchronous clears, a
synchronous clear, an asynchronous preset/load, a synchronous load, and
add/subtract control signals, providing a maximum of 10 control signals at a time.
Although synchronous load and clear signals are generally used when implementing
counters, they can also be used with other functions.
Each LAB can use two clocks and two clock enable signals. Each LAB鈥檚 clock and
clock enable signals are linked. For example, any LE in a particular LAB using the
labclk1
signal also uses
labclkena1.
If the LAB uses both the rising and falling
edges of a clock, it also uses both LAB-wide clock signals. Deasserting the clock
enable signal turns off the LAB-wide clock.
Each LAB can use two asynchronous clear signals and an asynchronous load/preset
signal. By default, the Quartus II software uses a
NOT
gate push-back technique to
achieve preset. If you disable the
NOT
gate push-back option or assign a given register
to power-up high using the Quartus II software, the preset is then achieved using the
asynchronous load signal with asynchronous load data input tied high.
With the LAB-wide addnsub control signal, a single LE can implement a one-bit adder
and subtractor. This saves LE resources and improves performance for logic functions
such as correlators and signed multipliers that alternate between addition and
subtraction depending on data.
The LAB column clocks [3..0], driven by the global clock network, and LAB local
interconnect generate the LAB-wide control signals. The MultiTrack interconnect
structure drives the LAB local interconnect for non-global control signal generation.
The MultiTrack interconnect鈥檚 inherent low skew allows clock and control signal
distribution in addition to data.
Figure 2鈥?
shows the LAB control signal generation
circuit.
漏 October 2008
Altera Corporation
MAX II Device Handbook

EPM240T100C5N 產(chǎn)品屬性

  • 270

  • 集成電路 (IC)

  • 嵌入式 - CPLD（復(fù)雜可編程邏輯器件）

  • MAX® II

  • 系統(tǒng)內(nèi)可編程

  • 4.7ns

  • 2.5V，3.3V

  • 240

  • 192

  • -

  • 80

  • 0°C ~ 85°C

  • 表面貼裝

  • 100-TQFP

  • 100-TQFP（14x14）

  • 托盤

  • 544-1964EPM240T100C5N-ND

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