HSP3824 Datasheet, PDF (1/41 Pages) Harris Corporation – Direct Sequence Spread Spectrum Baseband Processor

SEMICONDUCTOR
HSP3824
PRELIMINARY
March 1996
Direct Sequence Spread Spectrum
Baseband Processor
Features
• Complete DSSS Baseband Processor
• High Data Rate. . . . . . . . . . . . . . . . . . . . .up to 4 MBPS
• Processing Gain . . . . . . . . . . . . . . . . . . . . . up to 12dB
• Programmable PN Code . . . . . . . . . . . . up to 16 Bits
• Ultra Small Package . . . . . . . . . . . . . . . . . 7 x 7 x 1mm
• Single Supply Operation (33MHz Max) . . 2.7V to 5.5V
• Single Supply Operation (44MHz Max) . . 3.3V to 5.0V
• Modulation Method . . . . . . . . . . . . . DBPSK or DQPSK
• Supports Full or Half Duplex Operations
• On-Chip A/D Converters for I/Q Data (3-Bit, 44 MSPS)
and RSSI (6-Bit, 2 MSPS)
Applications
• Systems Targeting IEEE802.11 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
TM _Description
The Harris HSP3824 Direct
Sequence (DSSS) baseband pro-
cessor is part of the PRISM™
2.4GHz radio chipset, and contains
all the functions necessary for a full or half duplex packet base-
band transceiver.
The HSP3824 has on-board ADC’s for analog I and Q inputs, for
which the HFA3724 IF QMODEM is recommended. Differential
phase shift keying modulation schemes DBPSK and DQPSK,
with optional data scrambling capability, are combined with a pro-
grammable PN sequence of up to 16 bits. Built-in flexibility allows
the HSP3824 to be configured through a general purpose control
bus, for a wide range of applications. A Receive Signal Strength
Indicator (RSSI) monitoring function with on-board 6-bit 2 MSPS
ADC provides Clear Channel Assessment (CCA) to avoid data
collisions and optimize network throughput. The HSP3824 is
housed in a thin plastic quad flat package (TQFP) suitable for
PCMCIA board applications.
Ordering Information
PART NO.
HSP3824VI
TEMP. RANGE
-40^oC to +85^oC
PKG. TYPE
48 Lead TQFP
PKG. NO.
Q48.7x7
Simplified Block Diagram
Pinout
HSP3824 (TQFP)
I_IN
3-BIT
A/D
Q_IN
3-BIT
A/D
RSSI
I_OUT
6-BIT
A/D
Q_OUT
DPSK
DEMOD.
CCA
PRO-
CESSOR
INTER-
FACE
DPSK
MOD.
CTRL
TEST_CK
TX_PE
TXD
TXCLK
TX_RDY
GND
V_DD
R/W
CS
V_DD
GND
I_IN
48 47 46 45 44 43 42 41 40 39 38 37
1
36
2
35
3
34
4
33
5
32
6
31
7
30
8
29
9
28
10
27
11
26
12
25
13 14 15 16 17 18 19 20 21 22 23 24
RXCLK
RXD
MD_RDY
RX_PE
CCA
GND
MCLK
V_DD
RESET
ANTSEL
A/D_CAL
SD
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright © Harris Corporation 1996
PRISM™ and the PRISM™ logo are Trademarks of Harris Corporation
1
File Number 4064.2