6

Ei16C552

NOTES ON PIN DESCRIPTION:

1) Pin 4 and Pin 2 can be used by external crystal oscillator in future versions

2) Pin 23 and Pin 43 can be used as OUT20• and OUT21• respectively in future versions

ORDERING INFORMATION

Ei16C552-CJ68

68 Pin PLCC package

LIFE SUPPORT POLICY: Epic products are not to be used in life support devices without prior written

authorization.

Epic Semiconductor Inc. retains the right to make changes these specifications at any time, without notice.

Tri-state® is a Registered Trademark of National Semiconductor,Inc.

IBM PC AT™ and PS2 are Trademark s of International Business Machines.

BLOCK DIAGRAM

CTS0•

DSDR0•

RLSD0•

R10•

SIN0

CS0•

DB0-DB7

CTS1•

DSR1•

RLSD1•

RI1•

SIN1

CS1•

A0-A2

IOW•

IOR•

RESET•

CLK

ERR•

SLCT

BUSY

PE

ACK•

LPTOE•

CS2•

UART

#1

UART

#2

PARALLEL

PORT

SELECT

AND

CONTROL

LOGIC

8

8

8

RTS0•

DTR0•

SOUT0

INT0

TXRDY0•

RXRDY0*

RTS1•

DTR1•

SOUT1

INT1

TXRDY1•

RXRDY1•

BDO

PD0-PD7

INIT•

AFD•

STB•

SLIN•

INT2

8

•

3

For additional information, contact IMP, Inc. at 408.432.9100 or visit www.impweb.com

IMP, Inc. acquired Epic products on January 26, 2001. (see press release at http://www.impweb.com/PRESS/PR012601.htm)