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ATR2434 데이터시트 PDF




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부품번호 ATR2434 기능
기능 WirelessUSB 2.4-GHz DSSS Radio SoC
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ATR2434 데이터시트, 핀배열, 회로
www.DataSheet4U.com
Features
2.4-GHz Radio Transceiver
Operates in the Unlicensed Industrial, Scientific, and Medical (ISM) Band
(2.4 GHz to 2.483 GHz)
-95 dBm Reception Sensitivity
Up to 0 dBm Output Power
Range of up to 50 Meters or More
Data Throughput of up to 62.5 kbits/s
Highly Integrated, Low Cost, Minimal Number of External Components Required
Dual DSSS Reconfigurable Baseband Correlators
SPI Microcontroller Interface (up to 2-MHz Data Rate)
13-MHz Input Clock Operation
Low Standby Current < 1 µA
Integrated 32-bit Manufacturing ID
Operating Voltage from 2.7 V to 3.6 V
Operating Temperature from -40°C to +85°C
Offered in a Small Footprint QFN48 Package
Applications
PC Human Interface Devices
– Mice
– Keyboards
– Joysticks
Peripheral Gaming Devices
– Game Controllers
– Console Keyboards
General
– Presenter Tools
– Remote Controls
– Consumer Electronics
– Barcode Scanners
– POS Peripherals
– Toys
WirelessUSB
2.4-GHz DSSS
Radio SoC
ATR2434
Preliminary
Functional Description
The ATR2434 transceiver is a single-chip 2.4-GHz Direct Sequence Spread Spectrum
(DSSS) Gaussian Frequency Shift Keying (GFSK) baseband modem radio that con-
nects directly to a microcontroller.
Rev. 4822C–ISM–09/04




ATR2434 pdf, 반도체, 판매, 대치품
www.DataSheet4U.com
Applications Support
The ATR2434 is supported by both the WirelessUSB Development Kit and the Wire-
lessUSB N:1 Development Kit. The development kit provides all of the materials and
documents needed to cut the cord on multipoint to point and point to point low band-
width high node density applications including four small form-factor sensor boards and
a hub board that connect to WirelessUSB RF module boards, comprehensive Wire-
lessUSB protocol code examples and all of the associated schematics, gerber files and
bill of materials. The WirelessUSB N:1 Development Kit is also supported by the Wire-
lessUSB Listener Tool.
Functional Overview
The ATR2434 provides a complete WirelessUSB SPI to antenna radio modem. The
ATR2434 is designed to implement wireless devices operating in the worldwide 2.4-GHz
Industrial, Scientific, and Medical (ISM) frequency band (2.400 GHz to 2.4835 GHz). It
is intended for systems compliant with world-wide regulations covered by
ETSI EN 301 489-1 V1.4.1, ETSI EN 300 328-1 V1.3.1 (European Countries);
FCC CFR 47 Part 15 (USA and Industry Canada) and ARIB STD-T66 (Japan).
The ATR2434 contains a 2.4-GHz radio transceiver, a GFSK modem and a dual DSSS
reconfigurable baseband. The radio and baseband are both code- and frequency-agile.
Forty-nine spreading codes selected for optimal performance (Gold codes) are sup-
ported across 78 1-MHz channels yielding a theoretical spectral capacity of 3822
channels. The ATR2434 supports a range of up to 50 meters or more.
2.4-GHz Radio
The receiver and transmitter are a single-conversion low-Intermediate Frequency
(low-IF) architecture with fully integrated IF channel matched filters to achieve high per-
formance in the presence of interference. An integrated Power Amplifier (PA) provides
an output power control range of 30 dB in seven steps.
Both the receiver and transmitter integrated Voltage Controlled Oscillator (VCO) and
synthesizer have the agility to cover the complete 2.4-GHz GFSK radio transmitter ISM
band. The VCO loop filter is also integrated on-chip.
GFSK Modem
The transmitter uses a DSP-based vector modulator to convert the 1-MHz chips to an
accurate GFSK carrier.
The receiver uses a fully integrated Frequency Modulator (FM) detector with automatic
data slicer to demodulate the GFSK signal.
Dual DSSS Baseband
Data is converted to DSSS chips by a digital spreader. De-spreading is performed by an
oversampled correlator. The DSSS baseband cancels spurious noise and assembles
properly correlated data bytes.
The DSSS baseband has four operating modes: 64 chips/bit single channel, 32 chips/bit
dual channel, 32 chips/bit single channel 2 × oversampled, and 32 chips/bit single
channel Dual Data Rate (DDR).
64 Chips/Bit Single Channel
The baseband supports a single data stream operating at 15.625 kbits/s. The advantage
of selecting this mode is its ability to tolerate a noisy environment. This is because the
15.625 kbits/s data stream utilizes the longest PN code resulting in the highest probabil-
ity for recovering packets over the air. This mode can also be selected for systems
requiring data transmissions over longer ranges.
4 ATR2434 [Preliminary]
4822C–ISM–09/04

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ATR2434 전자부품, 판매, 대치품
ATR2434 [Preliminary]
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The SPI communications interface has a burst mechanism, where the command byte
can be followed by as many data bytes as desired. A burst transaction is terminated by
deasserting the slave select (SS = 1).
The SPI communications interface single read and burst read sequences are shown in
Figure 3 and Figure 4, respectively.
The SPI communications interface single write and burst write sequences are shown in
Figure 5 and Figure 6 on page 8, respectively.
Table 1. SPI Transaction Format
Byte 1
Bit #
7
Bit Name
DIR
6
INC
Figure 3. SPI Single Read Sequence
Byte 1 + N
[5:0] [7:0]
Address
Data
SCK
SS
MOSI
M IS O
cm d
addr
D IR
IN C
0 0 A5 A4 A3 A2 A1 A0
data to m cu
D7 D6 D5 D4 D3 D2 D1 D0
Figure 4. SPI Burst Read Sequence
SCK
SS
MOSI
M IS O
cm d
addr
D IR IN C
0 1 A5 A4 A3 A2 A1 A0
data to m cu 1
D7 D6 D5 D4 D3 D2 D1 D0
data to m cu 1+N
D7 D6 D5 D4 D3 D2 D1 D0
Figure 5. SPI Single Write Sequence
SCK
SS
MOSI
M IS O
cmd
addr
data from mcu
DIR INC
1 0 A5 A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0
4822C–ISM–09/04
7

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부품번호상세설명 및 기능제조사
ATR2434

WirelessUSB 2.4-GHz DSSS Radio SoC

ATMEL Corporation
ATMEL Corporation

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