HSDL-7000

HSDL-7000 Datasheet

HSDL-7000 IR 3/16 Encode/Decode IC

Part	Datasheet
HSDL-7000	HSDL-7000 (pdf)

Related Parts	Information
HSDL-7000#100	HSDL-7000#100

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HSDL-7000 IR 3/16 Encode/Decode IC Data Sheet The HSDL-7000 performs the modulation/ demodulation function used to both encode and decode the electrical pulses from the IR transceiver. These pulses are then sent to a standard UART which has a BAUDOUT signal available externally. This signal is 16 times the selected baud rate. In applications where the 16XCLK is not available, an external means of generating the 16XCLK must be designed. The HSDL-7000 is comprised of two state machines the serial IR encode and the serial IR decode blocks. Each of these blocks derives their timing from the 16XCLK input signal from the UART. The Encode block is driven by the negative edge triggered TXD signal from the UART. This initiates the modulation state machine resulting in the 3/16 modulated IR_TXD signal which drives the IR transceiver module. The IR Decode block is driven by the negative edge triggered IR_RCV signal from the infrared transceiver module. After this signal is demodulated and stretched, it drives the RCV signal to the UART. • Compliant with IrDA physical layer specs • Interfaces with IrDA compliant SIR 115Kbps transceiver • 1 Micron CMOS gate array • Used in conjunction with standard 16550 UART Applications Interfaces with SIR infrared transceivers to perform: • Serial half-duplex data transfer between Notebook computers Subnotebooks Desktops PCs PDAs Printers Other peripheral devices • Telecom applications in Modems Fax machines Pagers Phones • Industrial applications in Data collection devices • Medical applications in Patient and pharmaceutical data collection Schematic HSDL-7000 IR ENCODE IR_TXD RCV NRST IR DECODE IR_RCV Pin Out 16XCLK 1 7000 YYWW 7 IR_TXD 6 IR_RCV NRST Pin Description 16XCLK - Positive edge triggered input clock that is set to 16 times the data transmission baud rate. The encode and decode schemes require this signal. The signal is usually tied to a UART’s BAUDOUT signal. TXD - Negative edge triggered input signal usually tied to a UART’s SOUT signal serial data to be transmitted . RCV - Output signal which is usually tied to a UART’s SIN signal received serial data . GND - Chip ground. NRST - Active low signal used to reset the decode state machine. This signal can be tied to POR Power on reset or VCC. This signal can also be used to disable any data reception. IR_RCV - A 3/16th pulse width input signal from the infrared transceiver. The signal is a demodulated pulse stretched to generate the RCV output signal. IR_TXD - This signal is the modulated 3/16ths TXD signal which is input to the infrared transceiver. VCC - Power. Package Dimensions MAX. ± ± DETAIL A, SCALE 20 MAX. SEE DETAIL A NOTE DIMENSIONS IN MILLIMETERS INCHES . ± ±

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HSDL-7000 IR 3/16 Encode/Decode IC

Data Sheet

The HSDL-7000 performs the modulation/ demodulation function used to both encode and decode the electrical pulses from the IR transceiver. These pulses are then sent to a standard UART which has a BAUDOUT signal available externally. This signal is 16 times the selected baud rate. In applications where the 16XCLK is not available, an external means of generating the 16XCLK must be designed.

The HSDL-7000 is comprised of two state machines the serial IR encode and the serial IR decode blocks. Each of these blocks derives their timing from the 16XCLK input signal from the UART. The Encode block is driven by the negative edge triggered TXD signal from the UART. This initiates the modulation state machine resulting in the 3/16 modulated IR_TXD signal which drives the IR transceiver module. The IR Decode block is driven by the negative edge triggered IR_RCV signal from the infrared transceiver module. After this signal is demodulated and stretched, it drives the RCV signal to the UART.
• Compliant with IrDA physical layer specs
• Interfaces with IrDA compliant SIR 115Kbps
transceiver
• 1 Micron CMOS gate array
• Used in conjunction with standard 16550 UART

Applications Interfaces with SIR infrared transceivers to perform:
• Serial half-duplex data transfer between Notebook computers Subnotebooks Desktops PCs PDAs Printers Other peripheral devices
• Telecom applications in Modems Fax machines Pagers Phones
• Industrial applications in Data collection devices
• Medical applications in Patient and pharmaceutical data collection

Schematic

HSDL-7000

IR ENCODE

IR_TXD

RCV NRST

IR DECODE

IR_RCV

Pin Out
16XCLK 1
7000 YYWW
7 IR_TXD
6 IR_RCV

NRST

Pin Description
16XCLK - Positive edge triggered input clock that is set to 16 times the data transmission baud rate. The encode and decode schemes require this signal. The signal is usually tied to a UART’s BAUDOUT signal.

TXD - Negative edge triggered input signal usually tied to a UART’s SOUT signal serial data to be transmitted .

RCV - Output signal which is usually tied to a UART’s SIN signal received serial data .

GND - Chip ground.

NRST - Active low signal used to reset the decode state machine. This signal can be tied to POR Power on reset or VCC. This signal can also be used to disable any data reception.

IR_RCV - A 3/16th pulse width input signal from the infrared transceiver. The signal is a demodulated pulse stretched to generate the RCV output signal.

IR_TXD - This signal is the modulated 3/16ths TXD signal which is input to the infrared transceiver.

VCC - Power.

Package Dimensions

MAX.
± ±

DETAIL A, SCALE 20

MAX.

SEE DETAIL A

NOTE DIMENSIONS IN MILLIMETERS INCHES .
± ±

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Datasheet ID: HSDL-7000 645824