AT89C5122D-RDRUM datasheet(198/208 Pages) ATMEL

Teilenummer	AT89C5122D-RDRUM

Bauteilbeschribung	C51 Microcontroller with USB and Smart Card Reader Interfaces

PDF	208 Pages

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Hersteller	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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198 / 208 page

198

AT83R5122, AT8xC5122/23

4202F–SCR–07/2008

This diagram indicates when signals are clocked internally. The time it takes the signals

to propagate to the pins, however, ranges from 25 to 125 ns. This propagation delay is

dependent on variables such as temperature and pin loading. Propagation also varies

from output to output and component. Typically though (TA=25°C fully loaded) RD and

WR propagation delays are approximately 50 ns. The other signals are typically 85 ns.

Propagation delays are incorporated in the AC specifications.

USB Interface

Rise Time

Fall Time

VCRS

Differential

Data Lines

90%

10%

90%

10%

VHmin

VLmax

Symbol

Parameter

Min

Typ(5)

Max

Unit

Rise Time

Fall Time

tFDRATE

Full-speed Data Rate

11.9700

12.0300

Mb/s

VCRS

Crossover Voltage

1.3

2.0

tDJ1

Source Jitter Total to next transaction

-3.5

3.5

tDJ2

Source Jitter Total for paired

transactions

-4

tJR1

Receiver Jitter to next transaction

-18.5

18.5

tJR2

Receiver Jitter for paired transactions

-9

AT89C5122D-RDRUM Datenblatt(PDF) 198 Page - ATMEL Corporation

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