TIR1000, TIR1000I

STANDALONE IrDA

™ ENCODER AND DECODER

SLLS228F – DECEMBER 1995 – REVISED JULY 1999

1

POST OFFICE BOX 655303

Asynchronous Receiver Transmitter

(UART)

(IrDA

™) and Hewlett Packard Serial Infrared

(HPSIR)

Outline Packages (PSOP), PS Package Has

Slightly Larger Dimensions Than PW

Package

description

The TIR1000 serial infrared (SIR) encoder/

decoder is a CMOS device which encodes and

decodes bit data in conformance with the IrDA

specification.

A transceiver device is needed to interface to the photo-sensitive diode (PIN) and the light emitting diode (LED).

A UART is needed to interface to the serial data lines.

Terminal Functions

TERMINAL

I/O

DESCRIPTION

NAME

NO.

I/O

DESCRIPTION

16XCLK

1

I

Clock signal. 16XCLK should be set to 16 times the baud rate. The highest baud rate for IrDA is 115.2 kbps for which the

clock frequency equals 1.843 MHz (this terminal is tied to the BAUDOUT of a UART).

GND

4

Ground

IR_RXD

6

I

Infrared receiver data. IR_RXD is an IrDA-SIR-modulated input from an optoelectronics transceiver whose input pulses

should be 3/16 of the baud rate period.

IR_TXD

7

O

Infrared transmitter data. IR_TXD is an IrDA-SIR-modulated output to an optoelectronics transceiver.

RESET

5

I

Active high reset. RESET initializes an IrDA-SIR-decode/encode state machine (this terminal is tied to a UART reset

line).

U_RXD

3

O

Receiver data. U_RXD is decoded (demodulated) data from IR_RXD according to the IrDA specification (this terminal is

tied to SIN of a UART).

U_TXD

2

I

Transmitter data. U_TXD is encoded (modulated) data and output data as IR_TXD (this terminal is tied to SOUT from a

UART).

VCC

8

Supply voltage

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

IrDA is a registered trademark of the Infrared Data Association.

functional block diagram

1

2

3

4

8

7

6

5

16XCLK

U_TXD

U_RXD

GND

IR_TXD

IR_RXD

RESET

PS OR PW PACKAGE

(TOP VIEW)

Decoder

Encoder

RESET

IR_RXD

16XCLK

U_TXD

U_RXD

IR_TXD

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Copyright

© 1999, Texas Instruments Incorporated