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PDF MRF24WG0MA Data sheet ( Hoja de datos )
| Número de pieza | MRF24WG0MA | |
| Descripción | RF Transceiver Module | |
| Fabricantes | Microchip | |
| Logotipo |  |
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MRF24WG0MA/MB
MRF24WG0MA/MB Data Sheet
2.4 GHz IEEE 802.11b/g™
Features:
• IEEE 802.11-compliant RF transceiver
• Serialized unique MAC address
• Data rate: 1 to 11 Mbps for 802.11b / 6 to 54 Mbps
for 802.11g
• Compatible with IEEE 802.11b/g/n networks
• Small size: 21 mm x 31 mm 36-pin Surface Mount
module
• Integrated PCB antenna (MRF24WG0MA)
• External antenna option (MRF24WG0MB) with
ultra-miniature coaxial (U.FL) connector
• Easy integration into final product – accelerates
product development, provides quicker time to
market
• Radio regulation certification for United States
(FCC), Canada (IC), and Europe (ETSI)
• Designed for use with Microchip microcontroller
families (PIC18, PIC24, dsPIC33, and PIC32) with
downloadable Microchip TCP/IP Stack
Operational:
• Single operating voltage: 2.8V to 3.6V (3.3V typical)
• Temperature range: -40°C to +85°C
• Simple, four-wire SPI interface with interrupt
• Low-current consumption:
- RX mode – 156 mA (typical)
- TX mode – 240 mA (+18 dBm typical)
- PS mode – 4 mA (typical)
- Hibernate mode – 0.1 mA (typical)
RF/Analog Features:
• ISM Band 2.400 to 2.484 GHz operation
• Channels 1-11
• DSSS/OFDM modulation
• Application throughput: 4500 kbps
• -95 dBm Typical sensitivity at 1 Mbps
• +18 dBm Typical 802.11b TX power with control
• +16 dBm Typical 802.11g TX power with control
• Integrated low phase noise VCO, RF frequency
synthesizer, PLL loop filter and PA
• Integrated RSSI ADC and I/Q DACs, RSSI
readings available to host
MAC/Baseband Features:
• Hardware CSMA/CA access control, automatic
ACK, and FCS creation and checking
• Automatic MAC packet retransmit
• Hardware Security Engine for AES and
RC4-based ciphers
• Supports 802.1x, 802.1i security: WEP,
WPA-PSK, and WPA-2-PSK.
• Supports Infrastructure, Adhoc, Wi-Fi® Direct
Client
• Implements Wi-Fi Protected Setup (WPS), and
SoftAP for easy product commissioning
Applications:
• Utility and Smart Energy:
- Thermostats
- Smart Meters
- White Goods
- HVAC
• Consumer Electronics:
- Remote Control
- Internet Radio
- Home Security
- Toys
• Industrial Controls:
- Chemical Sensors
- HVAC
- Security Systems
- M2M Communication
• Remote Device Management:
- Location and Asset Tracking
- Automotive
- Code Update
• Retail:
- POS Terminals
- Wireless Price Tags
- Digital Remote
• Medical, Fitness, and Health Care:
- Glucose Meters
- Fitness Equipment
- Patient Asset Tracking
2012 Microchip Technology Inc.
Preliminary Information
DS70686B-page 1
1 page  
1.0 DEVICE OVERVIEW
The MRF24WG0MA and MRF24WG0MB are low-
power, 2.4 GHz, IEEE 802.11-compliant, surface
mount modules with all associated RF components –
crystal oscillator, bypass and bias passives with inte-
grated MAC, baseband, RF and power amplifier, and
built-in hardware support for AES, and TKIP (WEP,
WPA, WPA2 security). The modules also provide
acceleration for hosts running WPA-EAP application
security. The integrated module design frees the
designer from RF and antenna design tasks and regu-
latory compliance testing, ultimately providing quicker
time to market.
The MRF24WG0MA module is approved for use with
the integrated PCB meander antenna.
The MRF24WG0MB module comes with an ultra-
miniature coaxial connector (U.FL) and is approved
for use with a list of antenna types that are certified
with the module. See Section 2.7 “External
Antenna” for specific recommendations.
The MRF24WG0MA/MB modules are designed to be
used with Microchip’s TCP/IP software stack. The soft-
ware stack has an integrated driver that implements the
API that is used in the modules for command and control,
and for management and data packet traffic.
The Microchip TCP/IP software stack is available in the
free Microchip Application Libraries download
(including example applications and source code) from
the Microchip web site, http://www.microchip.com/
wireless.
The combination of the module and a PIC running the
TCP/IP stack results in support for IEEE Standard
802.11 and IP services. For example, this allows the
immediate implementation of a wireless web server
and e-mail clients.
The MRF24WG0MA/MB modules have received regu-
latory approvals for modular devices in the United
States (FCC), Canada (IC), and Europe (ETSI). The
modular approval removes the need for expensive RF
and antenna design, and allows the end user to place
the modules inside a finished product and not require
regulatory testing for an intentional radiator (RF trans-
mitter). See Section 3.0 “Regulatory Approval”, for
the specific requirements that should be adhered to by
the integrator.
MRF24WG0MA/MB
1.1 Interface Description
The block diagram in Figure 1-1 represents a
MRF24WG0MA/MB module. It interfaces to Microchip
PIC18, PIC24, dsPIC33, or PIC32 microcontrollers
through a four-wire serial slave SPI interface –
interrupt, hibernate, reset, power and ground signals.
The module runs on a single supply voltage of
nominally 3.3V. The serial trace port operates at 3.3V
and requires a level shifter for operation with RS-232
devices. This port provides a serial output of module
status messages and is helpful for debugging
purposes. Figure 1-2 shows a simplified example
connection between a Microchip PIC® MCU and the
module. Table 1-1 lists the pin descriptions.
Data communications with the MRF24WG0MA/MB are
through the SPI interface that is detailed in Section 2.0
“Circuit Description”. The Microchip PIC microcon-
troller communicates with the module through a com-
mand API from within the Microchip TCP/IP stack. The
command API is detailed in the Microchip TCP/IP stack
online Help that is included in the free Microchip
Application Libraries download.
2012 Microchip Technology Inc.
Preliminary Information
DS70686B-page 5
5 Page 
2.0 CIRCUIT DESCRIPTION
The MRF24WG0MA/MB interfaces to Microchip PIC18, PIC24, dsPIC33, and
PIC32 microprocessors with a minimal of external components through digital-
only connections. This section details use of the module, starting with an
example host connection as shown in Figure 2-1.
2.1 Schematic
FIGURE 2-1:
MRF24WG0MA/MB EXAMPLE APPLICATION SCHEMATIC
To System
Reset Controller
R2
4.7 K
To Host
Microcontroller
R4
4.7 K
+3.3V
C2
10µF
U1
MRF24WG0MA
1
NC
2
3
GND
NC
NC*
NC*
4
NC*
NC*
NC*
NC*
5
6
NC*
NC*
7
8
RESET
NC
NC*
9
10
NC
NC*
NC
NC
11
GND
NC
NC
NC
12
13
NC
NC
NC
14
15
NC
NC 16
17
NC
WP
18
VDD
GND
36
GND
SDI
35
34
SCK
INT
33
SDO
NC
32
31 NC
GND
30
29
VDD
GND
28
27
DEBUG_TX
DEBUG_RX
26
NC
GND
NC
25
24 NC
CS
23
22
NC
NC*
21
20
NC
NC*
HIBERNATE
GND
19
+3.3V
4x
4.7 K
+ 3.3V
C1
10µF
To Host
Microcontroller
Note: The example application schematic is for suggested design purposes. Please refer to Table 1-1 in Section 1.0 “Device Overview” for the module pin
descriptions.
11 Page | ||
| Páginas | Total 38 Páginas | |
| PDF Descargar | [ Datasheet MRF24WG0MA.PDF ] | |
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