EPF10K100 datasheet(38/128 Pages) ALTERA

38 / 128 page

Altera Corporation

FLEX 10K Embedded Programmable Logic Device Family Data Sheet

Figure 17. Enabling ClockLock & ClockBoost in the Same Design

To use both the ClockLock and ClockBoost circuits in the same design,

designers must use Revision C EPF10K100GC503-3DX devices and

MAX+PLUS II software versions 7.2 or higher. The die revision is

indicated by the third digit of the nine-digit code on the top side of the

device.

Output

Configuration

This section discusses the peripheral component interconnect (PCI)

pull-up clamping diode option, slew-rate control, open-drain output

option, MultiVolt I/O interface, and power sequencing for FLEX 10K

devices. The PCI pull-up clamping diode, slew-rate control, and

open-drain output options are controlled pin-by-pin via Altera logic

options. The MultiVolt I/O interface is controlled by connecting VCCIO to

a different voltage than VCCINT. Its effect can be simulated in the Altera

software via the Global Project Device Options dialog box (Assign

menu).

PCI Clamping Diodes

The EPF10K10A and EPF10K30A devices have a pull-up clamping diode

on every I/O, dedicated input, and dedicated clock pin. PCI clamping

diodes clamp the transient overshoot caused by reflected waves to the

VCCIO value and are required for 3.3-V PCI compliance. Clamping diodes

can also be used to limit overshoot in other systems.

Clamping diodes are controlled on a pin-by-pin basis via a logic option in

the Altera software. When VCCIO is 3.3 V, a pin that has the clamping

diode turned on can be driven by a 2.5-V or 3.3-V signal, but not a 5.0-V

signal. When VCCIO is 2.5 V, a pin that has the clamping diode turned on

can be driven by a 2.5-V signal, but not a 3.3-V or 5.0-V signal. However,

a clamping diode can be turned on for a subset of pins, which allows

devices to bridge between a 3.3-V PCI bus and a 5.0-V device.

aout

bout

gclk1

CLKLOCK

CLOCKBOOST=1

INPUT_FREQUENCY=50

CLOCKBOOST=2

INPUT_FREQUENCY=50

EPF10K100 数据表(PDF) 38 Page - Altera Corporation

EPF10K100 数据表(HTML) 38 Page - Altera Corporation

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