I9600 Datasheet, PDF (1/7 Pages) Radiometrix Ltd – 9600 baud Transparent Data Link IC

NEW
Issue 1, 15 May 2006
Radiometrix
Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England
Tel: [phone], Fax: [phone]
9600 baud Transparent Data Link IC
The i9600 is a 9600baud half-duplex
serial modem controller suitable for use
with wideband receivers, transmitters
and transceivers. It takes care of
preamble, synchronisation, bit
balancing and error checking and
enables a transparent radio data link
to be established between radio devices.
i9600
Figure 1: i9600-000-DIL modem IC
The i9600 provides a half duplex link. Provided no two devices attempt to transmit simultaneously no
further restrictions on data transmission need be made, as all transmit timing, valid data identification
and datastream buffering is conducted by the unit. Synchronisation and framing words in the packet
prevent the receiver outputting garbage in the absence of wanted RF signal or presence of interference.
For multiple radio systems (polled networks) a i9600 can be set to 1 of 8 unique addresses.
This unit supports 9600 baud asynchronous data: 1 start bit, 8 data bits, 1 stop bit
To connect to a true RS232 device, inverting level shifters must be used (MAX232 type are ideal, but
simple NPN transistor switches often suffice). With typical microcontrollers and UARTs, direct
connection is usable. Note that TXD has no internal pullup.
Features
• Operating voltage (temperature):
5V for standard version (-40°C to +85°C)
• Maximum usage of the range capability of an RF module
• Adequate preamble to settle data slicer in the receiver.
• Extra wake up preamble to allow for transmitter power up time requirements
• Differential Manchester encoding of address, data and checksum
• Synchronisation codes and checksum to reduce false triggering on noise
• Suitable to be used with Wide Band FM radio modules
• Serial modem baud rate at 9600bps (half-duplex)
• Addressable point-to-point
Applications
• PDAs, organisers & laptops
• Handheld / portable terminals
• EPOS equipment, barcode scanners
• In-building environmental monitoring and control
• Remote data acquisition system, data logging
• Fleet management, vehicle data acquisition
Radiometrix Ltd
i9600 Data Sheet
page 1