Hewlett-Packard HSDL-7000
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.FEATURES
● Compliant with IrDA Physical Layer Specs● Interfaces with IrDA Compliant HSDL-1000 IR Transceiver
● 1 Micron CMOS Gate Array
● Used in Conjunction with Standard 16550 UART
● Pin Compatible with PLX-1000
APPLICATIONS
Interfaces with HSDL-1000 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 CollectionDESCRIPTION
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. Schematic HSDL-7000 TXD IR ENCODE RCV NRST IR DECODE IR_TXD IR_RCV 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.