16C552 查看數據表（PDF） - IMP, Inc

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16C552

Dual FIFO UART and Parallel Port

IMP, Inc 

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

CLK input by a divisor between 1 and (216 -1)

•

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

ports, provide IBM PC AT™ and PS2 compatible

computers with a single device to serve the three

system ports.

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

PIN CONFIGURATION

SOUT1 10

DTR1• 11

RTS1• 12

CTS1• 13

DB0 14

DB1 15

DB2 16

DB3 17

DB4 18

DB5 19

DB6 20

DB7 21

TXRDY0• 22

VCC 23

RTS0• 24

DTR0• 25

SOUT0 26

Ei16C552-CJ68

60 INT1

59 INT2

58 SLIN•

57 INIT•

56 AFD•

55 STB•

54 GND

53 PD0

52 PD1

51 PD2

50 PD3

49 PD4

48 PD5

47 PD6

46 PD7

45 INT0

44 BD0

5

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)

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