MEC1322 Datasheet, PDF(390/456 Page) Microchip Technology – Keyboard and Embedded Controller for Notebook PC

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MEC1322 Datasheet, PDF (390/456 Pages) Microchip Technology – Keyboard and Embedded Controller for Notebook PC

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MEC1322

37.2.2 AC ELECTRICAL SPECIFICATIONS

The clock rise and fall times use the standard input thresholds of 0.8V and 2.0V unless otherwise specified and the

capacitive values listed in Section 37.2.2, "AC Electrical Specifications," on page 390.

37.2.3 CAPACITIVE LOADING SPECIFICATIONS

The following table defines the maximum capacitive load validated for the buffer characteristics listed in Table 37-4, âDC

Electrical Characteristics,â on page 391.

CAPACITANCE TA = 25Â°C; fc = 1MHz; Vcc = 3.3 VDC

Note: All output pins, except pin under test, tied to AC ground.

Parameter

Limits

Symbol

Unit

MIN

TYP

MAX

Notes

Input Capacitance of PCI_I and

CIN

PCI_IO pins

Note 37-2 pF

Input Capacitance of PCI_CLK pin

Output Load Capacitance supported

by PCI_IO, PCI_O, and PCI_OD

CIN

COUT

Note 37-2 pF

Note 37-2 pF

SUSCLK Input Capacitance

CIN

Input Capacitance of PECI_I and

CIN

PECI_IO

10

pF

10

pF

Output Load Capacitance supported COUT

by PECI_IO and OD_PH

10

pF

Input Capacitance (all other input

CIN

pins)

10

pF

Note 37-3

Output Capacitance (all other output COUT

pins)

20

pF

Note 37-4

Note 37-2 The PCI buffers are designed to meet the defined PCI Local Bus Specification, Rev. 2.1, electrical

requirements.

Note 37-3 All input buffers can be characterized by this capacitance unless otherwise specified.

Note 37-4 All output buffers can be characterized by this capacitance unless otherwise specified.

DS00001719D-page 390

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