Document
HFA3860B
Data Sheet July 1999 File Number
4594.1
Direct Sequence Spread Spectrum Baseband Processor
The Harris HFA3860B Direct Sequence Spread Spectrum (DSSS) baseband processor is part of the PRISM® 2.4GHz radio chipset, and contains all the functions necessary for a full or half duplex packet baseband transceiver.
™
Features
• Complete DSSS Baseband Processor • Processing Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥10dB • Programmable Data Rate. . . . . . . 1, 2, 5.5, and 11MBPS • Ultra Small Package . . . . . . . . . . . . . . . . . . . 7 x 7 x 1mm • Single Supply Operation (44MHz Max) . . . . 2.7V to 3.6V • Modulation Methods . . DBPSK, DQPSK, CCK, and MBOK • Supports Full or Half Duplex Operations • On-Chip A/D Converters for I/Q Data (3-Bit, 22 MSPS) and RSSI (6-Bit) • Backwards Compatible with HFA3824A, HFA3860A • Supports Dual Antenna Diversity
The HFA3860B has on-board A/Ds for analog I and Q inputs, for which the HFA3724/6 IF QMODEM is recommended. Differential phase shift keying modulation schemes DBPSK and DQPSK, with data scrambling capability, are available along with Complementary Code Keying and M-Ary Bi-Orthogonal Keying to provide a variety of data rates. Builtin flexibility allows the HFA3860B to be configured through a general purpose control bus, for a range of applications. A Receive Signal Strength Indicator (RSSI) monitoring function with on-board 6-bit A/D provides Clear Channel Assessment (CCA) to avoid data collisions and optimize network throughput. The HFA3860B is housed in a thin plastic quad flat package (TQFP) suitable for PCMCIA board applications.
Applications
• Enterprise WLAN Systems • Systems Targeting IEEE 802.11 Standard • DSSS PCMCIA Wireless Transceiver • Spread Spectrum WLAN RF Modems • TDMA Packet Protocol Radios • Part 15 Compliant Radio Links • Portable Bar Code Scanners/POS Terminal • Portable PDA/Notebook Computer • Wireless Digital Audio • Wireless Digital Video • PCN/Wireless PBX
Ordering Information
PART NO. HFA3860BIV HFA3860BIV96 TEMP. RANGE (oC) -40 to 85 -40 to 85 PKG. TYPE 48 Ld TQFP Tape and Reel PKG. NO. Q48.7x7
Pinout
HFA3860B (TQFP)
IOUT QOUT TEST7 TEST6 TEST5 TEST4 VDD GND TEST3 TEST2 TEST1 TEST0
Simplified Block Diagram
IIN DE-SPREADER 3-BIT A/D
QOUT QIN RSSI GND VREFP VREFN VDDA GND VDDA VDD GND SDI SCLK
SPREADER
TEST_CK TX_PE TXD TXCLK TX_RDY GND VDD R/W CS VDDA GND IIN
48 47 46 45 44 43 42 41 40 39 38 37 36 1 35 2 34 3 33 4 32 5 31 6 30 7 29 8 28 9 27 10 26 11 25 12 13 14 15 16 17 18 19 20 21 22 23 24
RXCLK RXD MD_RDY RX_PE CCA GND MCLK VDD RESET ANTSEL ANTSEL SD
QIN
3-BIT A/D
RSSI
6-BIT A/D
CCA
PROCESSOR INTERFACE
CTRL
IOUT
MOD.
4-1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999 PRISM® is a registered trademark of Intersil Corporation. PRISM logo is a trademark of Intersil Corporation.
DATA TO NETWORK PROCESSOR
DEMOD.
HFA3860B Table of Contents
PAGE Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Simplified Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Typical Application Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . External Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Control Port (4 Wire) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TX Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RX Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I/Q A/D Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A/D Calibration Circuit and Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .