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PDF RT2571W Data sheet ( Hoja de datos )
| Número de pieza | RT2571W | |
| Descripción | Highly integrated MAC/baseband processor | |
| Fabricantes | Ralink | |
| Logotipo |  |
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RT2571W
Data sheet
Revision June 22, 2007
Applications
• IEEE802.11a/b/g Wireless Local Area Networks
• Wireless Portable Device/Notebook Computer
The RT2571W is a highly integrated
MAC/baseband processor to support IEEE
802.11a/b/g USB wireless LAN Standards. The
processor is part of Ralink chip set RT2501USB for
the baseband part, it supports the Direct Sequence
Spread Spectrum (DSSS) for 2.4GHz band and
Orthogonal Frequency Division Multiplexing (OFDM)
for 2.4GHz and 5GHz bands. Using advanced
digital signal processing technologies, the optimal
reception performance under severe multi-path
environments is achieved.
For the MAC part, it provides all the required
functions and many optional features in the IEEE
standards, such as 802.11e (QOS), 802.11h
(TPC/DFS), 802.11i (Security). It has many on-chip
acceleration engines to ensure that the highest
MAC performance is achieved without overloading
host processing power.
Using advanced algorithms and design
methodologies, the chip is best-in-class in terms of
throughput, power consumption, range and multi-
path tolerance.
The RT2571W housed in a 180-pin 12*12mm2
TFBGA package is well suited for embedded
applications. External Interfaces include USB 1.1/
USB 2.0.
Features
• Host interface: USB1.1 / USB 2.0
• Full Implementation of the MAC Protocol
specified in IEEE Standards 802.11-1999
and 802.11g and 802.11g-2003
• Supported Operating System: Windows
XP, Windows2000, Windows ME, 98SE,
Linux
• Security: 64/128 WEP, WPA, AES
• Advanced Power Saving Algorithm for
Dynamic Network Traffic Environment
• On-Chip A/D and D/A Converters for I/Q
Data, TSSI and AGCs
• Supports Short Preamble
• Proprietary Robust Demodulator with
Patent Protection
• Mitigates Multipath Delay Spread up to
100ns at 54Mbps
• 8 GPIOs interface for WAN extension.
• 2 configurable LEDs to release CPU from
LED routine loading
• Support NOR-type flash interface
• Supports 6, 9, 12, 18, 24, 36, 48, 54
Mbps for OFDM; 5.5, 11Mbps for CCK;
and 1,2 Mbps for Barker modulation.
Functional Block Diagram
USB host interface
High-speed USB
PHY/controller
8-bit
MCU
Control
end-
point0
Bulk end-
point1
Bulk end-
point2
MAC
registers
Channel
state FSM
Tx/Rx DMA
WEP/TKIP/AES
engine
packet buffer
Control
registers
Rx
AGC
MAC Tx/Rx logic
CCK/OFD
M
Demod
CCK/OFD
M
Mod
Tx
AGC
Order Information
Part Number
RT2571WF
Temp Range
-10 to 85oC
Package
Lead-free 180B TFBGA
Ralink Technology, Corp. (Taiwan) Tel: 886-3-567-8868
4th Fl. No. 2, Technology 5th Rd. SBIP Fax: 886-3-567-8818
Hsin-Chu,Taiwan, R.O.C.
Ralink Technology, Corp. (USA) Tel: (408) 725-8070
20833 Stevens Creek Blvd. Ste 200 Fax:(408)725-8069
Cupertino, CA95014
http://www.ralinktech.com
DSRT2571W_V3.3_062207
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1 page  
RT2571W
Data sheet
Revision June 22, 2007
Electrical Specifications
Absolute Maximum Ratings
Core Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . .1.98V
I/O Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3.6V
Input, Output or I/O Voltage.. . . . . GND –0.3V to Vcc+0.3V
Operating Conditions
Ambient Temperature Range . . . . . . . . . . . -10 to 85oC
Maximum Operation Case Temperature . . . 95oC
Core Supply Voltage . . . . . . . . .. . . . . . . .. . 1.8V +/- 10%
I/O Supply Voltage . . . . . . . . . .. . . . . . . . . 3.3V +/- 10%
Thermal Information
Thermal Resistance θJA (oC/W,Note) in free air for
TFBGA (12x12mm) package.. . . . .. . . . . . ..51.4 oC/W
Maximum Junction Temperature . . . . . . . . . . . .125oC
Maximum Storage Temperature . . . . -40oC to 150oC
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only
rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is
not implied.
Note:
JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct
attach” features.
DC Electrical Specifications
Parameter
1.8 Power supply current
3.3V Power supply current
Logical one input voltage
Logical zero input voltage
Logical one output voltage
Logical zero output voltage
Input capacitance
Output capacitance
Symbol
ICC18PT
ICC18PR
ICC18SB
ICC33PT
ICC33PR
ICC33SB
VIH
VIL
VOH
VOL
CIN
COUT
Test Conditions
VDD = Max, transmit
VDD = Max, receive
VDD = Max, standby
VDD = Max, transmit
VDD = Max, receive
VDD = Max, standby
IOH = -1mA, VDD = Min
IOL = 2mA, VDD = Min
CLKIN frequency 1MHz.
All measurements
referenced to GND. TA =
25 oC
MIN
-
-
-
-
-
-
0.7 VDD
-
0.9 VDD
-
-
-
TYP
50
80
10
80
120
400
-
-
-
0.1
5
MAX
-
-
-
-
-
-
-
0.3
-
0.1 VDD
10
5 10
Units
mA
mA
μA
mA
mA
μA
V
V
V
V
pF
pF
DSRT2571W_V3.3_062207
-5-
5 Page 
WMM Scheduler Register
AIFSN: Aifsn (offset = 0400h)
Field
Type Default Description
Bit R/O 0x0 Reserved.
31:16
Bit R/W 0x0 AIFSN3.
15:12
Bit 11:8 R/W
0x0 AIFSN2.
Bit 7:4 R/W
0x0 AIFSN1.
Bit 3:0 R/W
0x0 AIFSN0.
CW_MIN: Cw_min (offset = 0404h)
Field
Type Default Description
Bit R/O 0x0 Reserved.
31:16
Bit R/W 0x0 Cw_min3.
15:12
Bit 11:8 R/W
0x0 Cw_min2.
Bit 7:4 R/W
0x0 Cw_min1.
Bit 3:0 R/W
0x0 Cw_min0.
CW_MAX: Cw_max (offset = 0408h)
Field
Type Default Description
Bit R/W 0x0 Reserved.
31:16
Bit R/W 0x0 Cw_max3.
15:12
Bit 11:8 R/W
0x0 Cw_max2.
Bit 7:4 R/W
0x0 Cw_max1.
Bit 3:0 R/W
0x0 Cw_max0.
TXOP01: TXOP0 and TXOP1 (offset = 040Ch)
Field
Type Default Description
Bit R/W 0x0 AC1 TXOP. Unit: 32uS.
31:16
Bit 15:0 R/W
0x0 AC0 TXOP. Unit: 32uS.
DSRT2571W_V3.3_062207
RT2571W
Data sheet
Revision June 22, 2007
- 11 -
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet RT2571W.PDF ] | |
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