DS0147 datasheet(44/128 Pages) MICROCHIP

44 / 128 page

Table 55 • Timers

Units

Max

Min

Symbol

Parameters

MHz

250

FTIMERCLK

Timer input clock fre-

quency

6.1.15

Fabric Interface

The following tables describe the fabric interface.

Table 56 • Maximum Clock Frequency

Units

Max

Min

Symbol

Parameter

MHz

250

FFABRICAXICLK

AXI

MHz

250

FFABRICAHBCLK

APB

6.2

I/O Standards Specifications

This section describes I/O delay measurement methodology, buffer speed, switching characteristics, digital

latency, gearing training calibration, and maximum physical interface (PHY) rate for memory interface IP.

6.2.1

Input Delay Measurement Methodology Maximum PHY Rate for Memory Interface IP

The following table provides information about the methodology for input delay measurement.

Table 57 • Input Delay Measurement Methodology

Unit

VREF

1, 5

VMEAS

3, 4

VICM

VID

Description

Standard

VDDI/2

VDDI

PCIE 3.3 V

PCI

VDDI/2

VDDI

LVTTL 3.3 V

LVTTL

VDDI/2

VDDI

LVCMOS 3.3

LVCMOS33

VDDI/2

VDDI

LVCMOS 2.5

LVCMOS25

VDDI/2

VDDI

LVCMOS 1.8

LVCMOS18

VDDI/2

VDDI

LVCMOS 1.5

LVCMOS15

VDDI/2

VDDI

LVCMOS 1.2

LVCMOS12

1.25

VREF

VREF + 0.5

VREF – 0.5

SSTL 2.5 V

Class I

SSTL25I

1.25

VREF

VREF + 0.5

VREF – 0.5

SSTL 2.5 V

Class II

SSTL25II

Microsemi Proprietary and Confidential. DS0147 Revision 1.0

AC Switching Characteristics

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