5

Ei16C552

Dual FIFO UART and

Parallel Port

FEATURES

•

IBM PC AT™ and PS/2™ compatible

•

Dual channel version of Ei16C550 with

Centronics printer interface

•

Independent control of transmit, receive, line

status and data set interrupts on each channel

•

Programmable serial interface characteristics for

each channel:

-5, 6, 7 or 8 bit characters

-Even, odd or no parity bit generation and

dectection

-1, 1.5 or 2 stop bit generation

•

Programmable baud rate generator divides

•

Tri-State® TTL drive capability for bidirectional

data bus and control bus on each channel

•

16 byte FIFO for receiver as well as for trans

mitter.

•

Advanced CMOS low power technology with

single 5 volt supply

DESCRIPTION

The Ei16C552 is an enhanced dual channel version

of the Ei16C550 Universal Asynchronous Receiver

Transmitter (UART). The device serves two serial

input/output interfaces simultaneously in microcom-

puter or microprocessor based systems. Each chan-

nel performs a serial-to-parallel conversion on data

characters received from peripheral devices or

modems, and a parallel-to-serial conversion on data

characters transmitted by the CPU. The complete

status of each channel of the dual UART can be

read at any time during functional operation by the

CPU. The information obtained includes the type and

condition of the transfer operations being performed,

and error conditions. In addition to its dual commu-

nications interface capabilities, the Ei16C552 pro-

vides the user with a fully bidirectional parallel data

port that fully supports the parallel Centronics type

printer. The parallel port, together with the two serial

computers with a single device to serve the three

system ports.

PIN CONFIGURATION

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

SOUT1

DTR1•

RTS1•

CTS1•

DB0

DB1

DB2

DB3

DB4

DB5

DB6

DB7

TXRDY0•

VCC

RTS0•

DTR0•

SOUT0

INT1

INT2

SLIN•

INIT•

AFD•

STB•

GND

PD0

PD1

PD2

PD3

PD4

PD5

PD6

PD7

INT0

BD0

Ei16C552-CJ68

60

59

58

57

56

55

54

53

52

51

50

49

48

47

46

45

44

Part Numbers May Be Marked With "IMP" or "Ei."

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)