IA82050

Data Sheet

Asynchronous Serial Controller

February 25, 2011

IA211030617-08

http://www.Innovasic.com

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TABLE OF CONTENTS

List of Figures ..................................................................................................................................4

List of Tables ...................................................................................................................................4

1.

Features...................................................................................................................................5

2.

Description..............................................................................................................................7

3.

Functional Overview ..............................................................................................................9

3.1

Transmitter ....................................................................................................................9

3.2

Receiver.........................................................................................................................9

3.3

Bus Interface .................................................................................................................9

3.4

Register Description ....................................................................................................10

4.

Register Descriptions............................................................................................................11

4.1

Baud Rate Generator A Divide Count, MSB and LSB (BAH/BAL) ..........................11

4.2

General Interrupt Enable Register (GER) ...................................................................11

4.3

General Interrupt Register (GIR) ................................................................................11

4.4

Line Configure Register (LCR)...................................................................................11

4.5

Line Status Register (LSR) .........................................................................................12

4.6

Modem Control Register (MCR) ................................................................................12

4.7

Modem Status Register (MSR) ...................................................................................13

4.8

Receive Data Register (RXDATA) .............................................................................13

4.9

Scratch Register (SCR) ...............................................................................................13

4.10 Transmit Data Register (TXDATA) ...........................................................................14

5.

AC/DC Parameters ...............................................................................................................15

6.

DC Characteristics ................................................................................................................16

7.

AC Characteristics ................................................................................................................17

8.

Packaging Information..........................................................................................................18

8.1

PDIP Package ..............................................................................................................18

8.2

PLCC Package.............................................................................................................19

9.

Innovasic Part Number Cross-Reference..............................................................................20

10.

Revision History ...................................................................................................................21

11.

For Additional Information...................................................................................................22