COM20022ITQFP datasheet(74/83 Pages) SMSC

부품명	COM20022ITQFP

상세설명	10 MBPS ARCNET CONTROLLER WITH 2KX8 ON BOARD RAM

PDF	83 Pages

Scroll/Zoom	100%

제조업체	SMSC [SMSC Corporation]

홈페이지	http://www.smsc.com

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74 / 83 page

10 Mbps ARCNET (ANSI 878.1) Controller with 2Kx8 On-Board RAM

Datasheet

Rev. 08-18-03

Page 74

SMSC COM20022I

DATASHEET

Parameter

Input Clock High Time

Input Clock Period*

min

max

units

XTAL1

Input Clock Frequency*

100

Input Clock Low Time

typ

MHz

Frequency Accuracy*

-200

200

ppm

Note*: Input clock frequency must be 20 MHz ( 100ppm or better) to use the internal Clock Multiplier.

t4 and t5 are applied to crystal oscillaton.

4.0V

1.0V

50% of VDD

Figure 8.15

- TTL Input Timing on XTAL1 Pin

Parameter

nRESET Pulse Width***

min

max

units

nRESET

nINTR High to Next nINTR Low

typ

nINTR

5TXTL*

EF = 0

EF = 1

TDR**/2

4TXTL*

Note*: TXTL is period of external XTAL oscillation frequency.

Note**: TDR is period of Data Rate (i.e. at 2.5 Mbps, TDR = 400 nS)

Note***: When the power is turned on, t1 is measured from stable XTAL

oscillation after VDD was over 4.5V.

Figure 8.16

- Reset and Interrupt Timing

COM20022ITQFP 데이터시트(PDF) 74 Page - SMSC Corporation

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