MICROCHIP MRF24WB0MB

MRF24WB0MA/MRF24WB0MB
MRF24WB0MA/MRF24WB0MB Data Sheet
2.4 GHz IEEE 802.11b™
Features
•
•
•
•
•
•
•
•
•
•
•
•
IEEE 802.11-compliant RF Transceiver
Serialized unique MAC address
Data Rate: 1 and 2 Mbps
Compatible with IEEE 802.11b/g/n networks
Small size: 21 mm x 31 mm 36-pin Surface Mount
Module
Integrated PCB antenna (MRF24WB0MA)
External antenna option (MRF24WB0MB) with
ultra miniature coaxial (UFL) connector
Range: up to 400m (1300 ft.)
Easy integration into final product – accelerates
product development, provides quicker time to
market
Radio regulation certification for United States
(FCC), Canada (IC), Europe (ETSI) and Japan
(ARIB)
Wi-Fi® certified (WFA ID: WFA7150)
Designed for use with Microchip microcontroller
families (PIC18, PIC24, dsPIC33, and PIC32) with
downloadable Microchip TCP/IP Stack
Operational
•
•
•
•
Single operating voltage: 2.7V–3.6V (3.3V typical)
Temperature Range: -40° C to +85° C
Simple, four-wire SPI interface with interrupt
Low-current consumption:
- RX mode – 85 mA (typical)
- TX mode – 154 mA (+10 dBm typical)
- Sleep – 250 µA (typical)
- Hibernate – <0.1 µA (typical)
RF/Analog Features
• ISM Band 2.400–2.484 GHz operation
• 14 Channels selectable individually or domainrestricted
• DSSS Modulation
• Data Rate – 1000 kbps
• -91 dBm Typical sensitivity at 1 Mbps
• +10 dBm Typical output power with control
• Integrated low phase noise VCO, RF frequency
synthesizer, PLL loop filter and PA
• Digital VCO and filter calibration
 2010-2013 Microchip Technology Inc.
• Integrated RSSI ADC and I/Q DACs, RSSI
readings available to host
• Balanced receiver and transmitter characteristics
for low power consumption
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, ad hoc
Applications
• Utility and Smart Energy
- Thermostats
- Smart Meters
- HVAC
• Consumer Electronics
- Remote Control
- Internet Radio
• Industrial Controls
- Chemical Sensors
- HVAC
- Security Systems
- M2M Communication
• Remote Device Management
- Location and Asset Tracking
- Automotive
• Retail
- POS Terminals
- Wireless Price Tags
- Digital Remote
• Medical, Fitness, and Health care
- Patient Asset Tracking
Note:
For products that are intended for use with
any Access Point, it is recommended to
use MRF24WG0MA/MB.
DS70632C-page 1
MRF24WB0MA/MRF24WB0MB
Pin Diagram
Note:
Antenna connector on MRF24WB0MB only.
DS70632C-page 2
 2010-2013 Microchip Technology Inc.
MRF24WB0MA/MRF24WB0MB
Table of Contents
1.0 Devices Overview......................................................................................................................................................................... 5
2.0 Circuit Description ...................................................................................................................................................................... 11
3.0 Regulatory Approval................................................................................................................................................................... 21
4.0 Electrical Characteristics ............................................................................................................................................................ 27
Appendix A: Revision History............................................................................................................................................................... 31
The Microchip Web Site ....................................................................................................................................................................... 33
Customer Change Notification Service ................................................................................................................................................ 33
Customer Support ................................................................................................................................................................................ 33
Reader Response ................................................................................................................................................................................ 34
Product Identification System .............................................................................................................................................................. 35
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An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for current
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 2010-2013 Microchip Technology Inc.
DS70632C-page 3
MRF24WB0MA/MRF24WB0MB
NOTES:
DS70632C-page 4
 2010-2013 Microchip Technology Inc.
MRF24WB0MA/MRF24WB0MB
1.0
DEVICES OVERVIEW
The MRF24WB0MA and MRF24WB0MB are low-power,
2.4 GHz, IEEE 802.11-compliant, surface mount
modules with all associated RF components such as
crystal oscillator, bypass and bias passives with
integrated MAC, baseband, RF and power amplifier, and
built-in hardware support for AES, and TKIP (WEP, WPA,
WPA2 security). The integrated module design frees the
designer from RF and antenna design tasks and
regulatory compliance testing, ultimately providing
quicker time to market. The MRF24WB0MA module is
approved for use with the integrated PCB meander
antenna.
The MRF24WB0MB has an ultra miniature coaxial
connector (U.FL) and is approved for use with a list of
pre-certified antennas. See Section 2.8, External
Antenna, for specific recommendations.
The MRF24WB0MA/MRF24WB0MB modules are
designed to be used with Microchip’s TCP/IP software
stack. The software 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
Microchip Application Libraries for free 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 802.11 and IP
services. This allows the immediate implementation of
a wireless web server.
 2010-2013 Microchip Technology Inc.
The MRF24WB0MA/MRF24WB0MB modules have
received regulatory 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 transmitter). They also have Radio Type Approval
Certification for Japan. See Section 3.0, Regulatory
Approval, for the specific requirements that should be
adhered to by the integrator.
1.1
Interface Description
Figure 1-1
represents
a
MRF24WB0MA/
MRF24WB0MB module. It interfaces to Microchip
PIC18, PIC24, dsPIC33, or PIC32 microcontrollers
through a four-wire serial slave SPI interface, such as
interrupt, hibernate, Reset, power and ground signals.
The module runs on a single supply voltage of
nominally 3.3V. It also supports optional JTAG and
serial debug for testability. The debug port operates at
3.3V and requires a level shifter for operation with RS232 devices. Figure 1-2 shows a simplified connection
between a Microchip’s PIC MCU and the module.
Table 1-1 lists the pin descriptions.
Data communications with the MRF24WB0MA/
MRF24WB0MB are through the SPI interface, for
more information see Section 2.0, Circuit Description. Microchip’s PIC MCUs communicates with the
module through a command API within the Microchip
TCP/IP stack. The command API is detailed in the
Microchip TCP/IP stack online help that is available in
the Microchip Application Libraries for free download.
DS70632C-page 5
MRF24WB0MA/MRF24WB0MB
FIGURE 1-1:
MRF24WB0MA/MRF24WB0MB BLOCK DIAGRAM
MRF24WB0MA 2. 4 GHz IEEE Std. 802.11b RF Transceiver Module
FLASH
PCB
Antenna
(MRF24WB0MA)
SPI
AES, TKIP
Encryption
Accelerator
Interface
2.4 GHz
Transceiver
RAM
Digital I/O
Interrupt
Power
JTAG
Debug
Matching
Circuitry
Power
Amplifier
ROM
Reset
Hibernate
FIGURE 1-2:
MICROCONTROLLER TO MRF24WB0MA/MRF24WB0MB INTERFACE
MRF24WB0Mx
External
Antenna
(MRF24WB0MB)
PIC Microcontroller
CS
I/O
SDI
SDO
SDO
SDI
SCK
SCK
INT
INTx
+3.3V (Typ)
VDD
HIBERNATE
I/O
GND
GND
WP
I/O
RESET
I/O
DS70632C-page 6
 2010-2013 Microchip Technology Inc.
MRF24WB0MA/MRF24WB0MB
TABLE 1-1:
Pin Description
Pin
Symbol
Type
1
GND
P
2
NC
NC
3
JTAGTDO
O
Description
Ground
Do not connect
JTAG test data output
(1)
4
JTAGTCK
5
JTAGTMS
6
JTAGTDI
I
JTAG test data input
7
RESET
I: Constant(1)
Module Reset input
8
NC
NC
I: Constant
I
JTAG clock input (drive or pull-up only)
JTAG mode input
Do not connect
9
JTAGRST
I
JTAG Reset input (optional; see Section 2.0, Circuit Description)
10
GND
P
Ground
11
NC
NC
Do not connect
12
NC
NC
Do not connect
13
NC
NC
Do not connect
14
NC
NC
Do not connect
15
NC
NC
Do not connect
16
WP(2)
I
Write protect (this pin is used to enable FLASH update)
17
VDD
P
Power
18
GND
P
Ground
19
GND
P
Ground
20
HIBERNATE
I
Hibernate mode enable (high input will disable the module)
21
JTAGEN
I
JTAG test enable
22
NC
NC
23
CS
I: Constant(1)
24
NC
NC
25
GND
P
Ground
26
DEBUGRX
I
Serial debug port input (see Section 2.0, Circuit Description)
27
DEBUGTX
O
Serial debug port output (see Section 2.0, Circuit Description)
28
GND
P
Ground
29
VDD
P
Power
30
GND
P
Ground
31
NC
NC
32
SDO
O
SPI data out
Do not connect
SPI Chip Select input, constant drive or pull-up required
Do not connect
Do not connect
33
INT
O
Interrupt output (open drain – requires a pull-up)
34
SCK
I
SPI clock input
35
SDI
I
SPI data in
36
GND
P
Ground
Legend: Pin type abbreviation: P = Power input, I = Input, O = Output, NC = Do Not Connect
Note 1:
2:
Signals of Type “I: Constant” must either be constantly driven by the host or have a pull-up or pull-down (in
case the host is likely to tri-state the signal during power down modes). The constant drive is used to
ensure defined operation of the part and to minimize leakage current during low power modes.
WP is used as write-protect for the internal module SPI Flash. For production use, this pin should be
pulled low. This pin can be controlled by the host microcontroller to enable in field Flash updates.
 2010-2013 Microchip Technology Inc.
DS70632C-page 7
MRF24WB0MA/MRF24WB0MB
1.2
Mounting Details
The MRF24WB0MA/MRF24WB0MB is a surface
mountable module. Module dimensions are shown in
Figure 1-3. The module Printed Circuit Board (PCB) is
1 mm thick with castellated mounting points on two
sides.
FIGURE 1-3:
MRF24WB0MA/MRF24WB0MB MODULE PHYSICAL DIMENSIONS
Note:
DS70632C-page 8
Antenna connector on
MRF24WB0MB only.
 2010-2013 Microchip Technology Inc.
MRF24WB0MA/MRF24WB0MB
The MRF24WB0MA has an integrated PCB antenna.
For best performance, mount the module on the PCB
without metal obstructions in the keep out area. The
antenna is tuned to have FR4 PCB material
FIGURE 1-4:
underneath the module. Do not “cut-out” host PCB
material under the antenna. Figure 1-4 shows the
recommended host PCB footprint for the module.
RECOMMENDED HOST PCB FOOTPRINT
Note 1: The “Note 1” demarcation specifies the host PCB copper plane “keep-out” area on underlying
board layers. Users can route surface escape traces in this area. The module has exposed
copper test points on bottom side in the “keep out” zone. Ensure that there is no exposed copper on mounting board that may short these.
 2010-2013 Microchip Technology Inc.
DS70632C-page 9
MRF24WB0MA/MRF24WB0MB
Figure 1-5 illustrates the module reflow profile that is
recommended for mounting the device onto the host
PCB.
FIGURE 1-5:
RECOMMENDED MODULE REFLOW PROFILE AND SETPOINTS
2
1
3
4
5
Zones
6
7
8
300
Temperature (°C)
250
200
150
100
50
0
0
50
100
150
200
250
300
Time (Seconds)
The following table lists the module re-flow profile
TABLE 1-2:
MODULE RE-FLOW PROFILE(1)
Zone
Temperature (°C)
Note 1:
1
2
3
4
5
6
7
8
180°
180°
200°
200°
200°
220°
265°
270°
Conveyor Speed: 90 cm/min.
details.
DS70632C-page 10
 2010-2013 Microchip Technology Inc.
MRF24WB0MA/MRF24WB0MB
2.0
CIRCUIT DESCRIPTION
The MRF24WB0MA/MRF24WB0MB interfaces to
Microchip’s 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:
2.2
MRF24WB0MA/MRF24WB0MB EXAMPLE APPLICATION SCHEMATIC
Power-On Sequence
The internal regulators for the digital and analog core
power supplies are disabled by driving the
HIBERNATE pin high. Figure 2-2 shows the power up
sequence for the MRF24WB0MA/MRF24WB0MB.
An internal Power-on Reset (POR) circuit which keeps
the module in Reset until VDD is within the
specification. The Hibernate and Reset signals are also
used to control startup. In Figure 2-2, section A is
controlled by the internal POR and section B is an
allowance for the SPI bus to stabilize when the module
supplies are enabled. After Hibernate is disabled, the
host software provides 1mS of startup to allow the SPI
to stabilize. This time is pre-programmed into the host
driver, and may need to be increased if insufficient
initial drive current is not provided to the MRF24WB0M
module. Section C is the driver controlled release from
Reset period. This takes approximately 300 mS and is
monitored by the stack driver. No additional time needs
to be provided by user software for startup.
 2010-2013 Microchip Technology Inc.
DS70632C-page 11
MRF24WB0MA/MRF24WB0MB
FIGURE 2-2:
DS70632C-page 12
MRF24WB0MA/MRF24WB0MB POWER-ON SEQUENCE TIMING
 2010-2013 Microchip Technology Inc.
MRF24WB0MA/MRF24WB0MB
2.3
Power States
The MRF24WB0MA/MRF24WB0MB has the following
power states: Hibernate, Sleep and Active (two substates), as shown in Figure 2.4. The selection of power
FIGURE 2-3:
state affects system behavior, and overall power consumption or battery life. Addition to that there is one
“Standby” state that is not user-controlled.
MRF24WB0MA/MRF24WB0MB POWER-STATE DIAGRAM
10 µs
Off
RX On
TX On
Note 1
200 µs
Hibernate
Standby
Note 1
200 µs
Sleep
Note 1: See Section 2.2, Power-On Sequence.
2.3.2
2.3.1
HIBERNATE STATE
An “Off” state is defined as no power applied to the
device. The Hibernate mode is the closest to controlled
off that the module can approach. It is controlled
through the HIBERNATE pin (high input puts the
module into Hibernate). When in Hibernate, the module
only consumes leakage current, but does not maintain
state. Hibernate has to be fully controlled by the PIC
MCU and requires the TCP/IP stack to restart on an
awake.
The module contains about 70µF of internal bulk
capacitance. Supplies should be provisioned to supply
sufficient charge on release of hibernate for required
start time or sufficient delay must be provided in
software after hibernate release and before Reset
release.
This state provides the best battery life for embedded
products. Entering Hibernate for intervals of less than
30 seconds is not likely to save power. Battery life
expectation can be more than a year for devices
operating on AA cells that is in Hibernate except to
wake up every hour for a small data transfer (<500
Bytes).
 2010-2013 Microchip Technology Inc.
SLEEP STATE
The Sleep state is a low power dynamic state that
implements the 802.11 Power Save feature. In this
mode, if enabled, the module will enter Power Save
mode when all activity is complete.
The module will wake autonomously to any PIC
intervention to check DTIM beacons from the Access
Point (AP). If any traffic is listed as queued for the
module, then it will awaken and get the data from the
AP on the next possible opportunity. When data is
acquired, the module will interrupt the PIC
microcontroller on a normal “data available” indication.
If no data is available on a DTIM check, the module
reenters the Power Save state until the next DTIM. The
DTIM interval is programmed at the AP. This state can
provide “as if on” behavior of the radio with a significant
power savings versus “always on”. The battery life
expectation of this mode is several days to several
weeks. This mode is characterized by a very-low
latency (as low as 200 mS) to begin data transfer from
the low-power state.
2.3.3
ACTIVE STATE
The Active state is identified as one of the two states
where the radio circuitry is fully on. The two active
states are the Receive state (RX ON) and Transmit
state (TX ON).
DS70632C-page 13
MRF24WB0MA/MRF24WB0MB
2.3.4
STANDBY STATE
The Standby state is not user-controlled, but it is noted
as it helps identify and track certain operations of the
module during power tracing.
TABLE 2-1:
MRF24WB0MA/MRF24WB0MB POWER STATE DEFINITIONS
State
VDD
Hibernate
Off
0V
0V
Hibernate
3.3V
3.3V
Sleep
3.3V
0V
Enabled by TCP/IP driver
RX ON
3.3V
0V
Receive circuits are ON and receiving
TX ON
3.3V
0V
Transmit circuits are ON and transmitting
Standby
3.3V
0V
State machine transition state only – not user controlled
DS70632C-page 14
Description
Power is disconnected
All internal power regulators are OFF – enabled by HIBERNATE pin
 2010-2013 Microchip Technology Inc.
MRF24WB0MA/MRF24WB0MB
2.4
JTAG Interface
Joint Test Action Group (JTAG) is the common name
used for IEEE 1149.1 entitled Standard Test Access
Port and Boundary-Scan Architecture for test access
ports that are used for testing printed circuit boards
using
boundary
scan.
The
MRF24WB0MA/
MRF24WB0MB supports JTAG boundary scan. The
JTAG port provides the optional hardware JTAG Reset
input, JTAGRST. JTAG_EN and JTAGRST need to be
driven high to enable JTAG mode. JTAG should not be
enabled during normal functional operation which
affects power state current.
2.5
Debug Serial Interface
The MRF24WB0MA/MRF24WB0MB incorporates a
Transmit Data pin (DEBUGTX) and a Receive Data pin
(DEBUGRX) for serial debugging purposes. These pins
can be connected to commercially available RS-232 line
drivers/receivers with appropriate external level shifters.
The serial interface operates at 19200, 8, N, 1, N.
2.6
SPI Interface
It is recommended that the module be mounted on the
edge of the host PCB. It is permitted for PCB material
to be below the antenna structure of the module as long
as no copper traces or planes are on the host PCB in
that area. For best performance, place the module on
the host PCB according to the details shown in
Figure 1-4.
Figure 2-4, Figure 2-5 and Figure 2-6 show the
antenna and simulated radiation patterns expected
from the PCB antenna. Refer to three separate axis of
measurement that corresponds to the orientation of the
module (drawn in the center of each plot).
The horizontal and vertical data, blue and red, in each
plot correspond to the orientation (polarization) of the
measurement antenna rotated 360 degrees around the
module.
The horizontal measurement was done with the receive
antenna parallel to the module PCB. The vertical measurement was done perpendicular to the module PCB.
These patterns allow the designer to understand the
performance of the module with respect to the position
of the receive or transmit antenna at the other end of
the link.
The slave Serial Peripheral Interface (SPI) is used to
interface with the host PIC microcontroller. The slave
SPI interface works with the Interrupt line (INT). When
data is available for the PIC microcontroller during
operation, the INT line is asserted (logic low) by the
MRF24WB0MA/MRF24WB0MB module. The INT line
is de-asserted (logic high) by the MRF24WB0MA/
MRF24WB0MB after the data is transferred to the host
PIC microcontroller. The SPI SCK frequency can be up
to 25 MHz.
The slave SPI interface implements the [CPOL = 0;
CPHA = 0] and [CPOL = 1; CPHA = 1] modes (0 and 3)
of operation. That is, data is clocked in on the first rising
edge of the clock after Chip Select (CS) is asserted.
Data is placed on the bus with most significant bit (MSb)
first.
The CS pin must be toggled with transfer blocks and
cannot be held low permanently. The falling edge of CS
is used to indicate the start of a transfer. The rising
edge of CS is used to indicate the completion of a
transfer.
Figure 4-1 in Section 4.0, Electrical Characteristics
shows the SPI timing diagram. Table 4-7 details the
SPI timing AC characteristics.
2.7
PCB Antenna
For MRF24WB0MA, the PCB antenna is fabricated on
the top copper layer and covered in solder mask. The
layers below the antenna have no copper trace.
 2010-2013 Microchip Technology Inc.
DS70632C-page 15
MRF24WB0MA/MRF24WB0MB
FIGURE 2-4:
AZIMUTH RADIATION PATTERN, 2.44 GHz
0°
0 dB
-5 dB
Horizontal
-10 dB
-15 dB
Vertical
-20 dB
270°
90°
180°
DS70632C-page 16
 2010-2013 Microchip Technology Inc.
MRF24WB0MA/MRF24WB0MB
FIGURE 2-5:
RADIATION PATTERN ON SIDE WITH PCB ANTENNA, 2.44 GHz
0°
0 dB
-5 dB
Horizontal
-10 dB
-15 dB
Vertical
-20 dB
270°
90°
180°
 2010-2013 Microchip Technology Inc.
DS70632C-page 17
MRF24WB0MA/MRF24WB0MB
FIGURE 2-6:
RADIATION PATTERN ALONG PIN EDGE, 2.44 GHz
0°
0 dB
-5 dB
Horizontal
-10 dB
-15 dB
-20 dB
270°
90°
Vertical
180°
DS70632C-page 18
 2010-2013 Microchip Technology Inc.
MRF24WB0MA/MRF24WB0MB
2.8
External Antenna
The choice of an external antenna is limited to the
antenna types the module is tested with. Refer to
Section 3.0, Regulatory Approval for specific countrywise regulatory requirements.
A list of antennas types tested with the MRF24WB0MB
modules is provided in Table 2-2.
TABLE 2-2:
TESTED EXTERNAL ANTENNA TYPES
Part Number
Type
Gain (dBi)
VSWR
Max.
Connector
Vendor
RFA-02-P05
PCB
2
2.0
IPEX
Aristotle
RFA-02-L6H1-70-35
Dipole
2
2.0
IPEX
Aristotle
RFA-02-D3
Dipole
1.5
2.0
IPEX
Aristotle
RFA-02-L2H1
Dipole
2
2.0
IPEX
Aristotle
RFA-02-3-C5H1
Dipole
3
2.0
IPEX
Aristotle
RFA-02-5-C7H1
Dipole
5
2.0
IPEX
Aristotle
RFA-02-5-F7H1
Dipole
5
2.0
IPEX
Aristotle
WF2400-15001A
Dipole
5
2.0
IPEX
Saytec
WF2400-15001AR
Dipole
5
2.0
RF-IPEX
Saytec
WF2400-10001I
Dipole
2
2.0
IPEX
Saytec
WF2400-10001R
Dipole
2
2.0
RF-IPEX
Saytec
AN2400-5901RS, used with connector
SMASFR8-3152H-00X00I
Omni
9
2.0
IPEX
Saytec
AN2400-5901RS, used with connector
SMASFR8-3152H-00X00IR
Omni
9
2.0
RF-IPEX
Saytec
 2010-2013 Microchip Technology Inc.
DS70632C-page 19
MRF24WB0MA/MRF24WB0MB
NOTES:
DS70632C-page 20
 2010-2013 Microchip Technology Inc.
MRF24WB0MA/MRF24WB0MB
3.0
REGULATORY APPROVAL
This section outlines the regulatory information for the
MRF24WB0MA/MRF24WB0MB module for the following
countries:
•
•
•
•
•
•
•
United States
Canada
Europe
Australia
New Zealand
Korea
Other
3.1
United States
The MRF24WB0MA/MRF24WB0MB module has
received Federal Communications Commission (FCC)
CFR47 Telecommunications, Part 15 Subpart C “Intentional Radiators” modular approval in accordance with
Part 15.212 Modular Transmitter approval. Modular
approval allows the end user to integrate the
MRF24WB0MA/MRF24WB0MB module into a finished
product without obtaining subsequent and separate
FCC approvals for intentional radiation, provided no
changes or modifications are made to the module circuitry. Changes or modifications could void the user's
authority to operate the equipment. The end user must
comply with all of the instructions provided by the
Grantee, which indicate installation and/or operating
conditions necessary for compliance.
The finished product is required to comply with all applicable FCC equipment authorizations regulations,
requirements and equipment functions not associated
with the transmitter module portion. For example, compliance must be demonstrated to regulations for other
transmitter components within the host product; to
requirements for unintentional radiators (Part 15 Subpart
B “Unintentional Radiators”), such as digital devices,
computer peripherals, radio receivers, etc; and to additional authorization requirements for the non-transmitter
functions on the transmitter module (i.e., Verification, or
Declaration of Conformity) (e.g., transmitter modules
may also contain digital logic functions) as appropriate.
3.1.1
LABELING AND USER
INFORMATION REQUIREMENTS
The MRF24WB0MA/MRF24WB0MB module is labeled
with its own FCC ID number. If the FCC ID is not visible
when the module is installed inside another device,
then the outside of the finished product into which the
module is installed must display a label referring to the
enclosed module.
 2010-2013 Microchip Technology Inc.
This exterior label can use wording as follows:
Contains Transmitter Module FCC ID:
W7OZG2100-ZG2101
or
Contains FCC ID: W7OZG2100-ZG2101
This device complies with Part 15 of the FCC
Rules. Operation is subject to the following two
conditions:
(1) this device may not cause harmful interference,
and (2) this device must accept any interference
received, including interference that may cause
undesired operation.
A user’s manual for the product should include the
following statement:
This equipment has been tested and found to
comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits
are designed to provide reasonable protection
against harmful interference in a residential
installation. This equipment generates, uses and
can radiate radio frequency energy, and if not
installed and used in accordance with the
instructions, may cause harmful interference to
radio communications. However, there is no
guarantee that interference will not occur in a
particular installation. If this equipment does cause
harmful interference to radio or television
reception, which can be determined by turning the
equipment off and on, the user is encouraged to try
to correct the interference by one or more of the
following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment
and receiver.
• Connect the equipment into an outlet on a circuit
different from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV
technician for help.
Additional information on labeling and user information
requirements for Part 15 devices can be found in KDB
Publication 784748 available at the FCC Office of Engineering and Technology (OET) Laboratory Division
Knowledge Database (KDB),
http://apps.fcc.gov/oetcf/kdb/index.cfm.
DS70632C-page 21
MRF24WB0MA/MRF24WB0MB
3.1.2
RF EXPOSURE
All transmitters regulated by FCC must comply with RF
exposure requirements. OET Bulletin 65, Evaluating
Compliance with FCC Guidelines for Human Exposure
to Radio Frequency Electromagnetic Fields, provides
assistance in determining whether proposed or existing
transmitting facilities, operations or devices comply
with limits for human exposure to Radio Frequency
(RF) fields adopted by the Federal Communications
Commission (FCC). The bulletin offers guidelines and
suggestions for evaluating compliance.
If appropriate, compliance with exposure guidelines for
mobile and unlicensed devices can be accomplished
by the use of warning labels and by providing users
with information concerning minimum separation
distances from transmitting structures and proper
installation of antennas.
The following statement must be included as a caution
statement in manuals and OEM products to alert users
of FCC RF exposure compliance:
To satisfy FCC RF Exposure requirements for
mobile and base station transmission devices, a
separation distance of 20 cm or more should be
maintained between the antenna of this device and
persons during operation. To ensure compliance,
operation at closer than this distance is not
recommended.
The antenna(s) used for this transmitter must not
be co-located or operating in conjunction with any
other antenna or transmitter.
If the MRF24WB0MA/MRF24WB0MB module is used
in a portable application (i.e., the antenna is less than
20 cm from persons during operation), the integrator is
responsible for performing Specific Absorption Rate
(SAR) testing in accordance with FCC rules 2.1091.
3.1.3
APPROVED EXTERNAL ANTENNA
TYPES
To maintain modular approval in the United States, only
tested antenna types must be used. It is permissible to
use different manufacturer antenna provided the same
antenna type and antenna gain (equal to or less than)
is used.
3.2
Canada
The MRF24WB0MA/MRF24WB0MB module is certified for use in Canada under Industry Canada (IC)
Radio Standards Specification (RSS) RSS-210 and
RSSGen. Modular approval permits the installation of a
module in a host device without the need to recertify
the device.
3.2.1
LABELING AND USER
INFORMATION REQUIREMENTS
Labeling requirements for the Host Device (from Section 3.2.1, RSS-Gen, Issue 3, December 2010): The
host device must be labeled to identify the module
within the host device.
The Industry Canada certification label of a module
must be clearly visible at all times when installed in the
host device, otherwise the host device must be labeled
to display the Industry Canada certification number of
the module, preceded by the words “Contains transmitter module”, or the word “Contains”, or similar wording
expressing the same meaning, as follows:
Contains transmitter module IC:
8248A-G21ZEROG
User Manual Notice for License-Exempt Radio Apparatus (from Section 7.1.3, RSS-Gen, Issue 3, December
2010): User manuals for license-exempt radio apparatus
must contain the following or equivalent notice in a conspicuous location in the user manual or alternatively on
the device or both:
This device complies with Industry Canada
license-exempt RSS standard(s). Operation is
subject to the following two conditions: (1) this
device may not cause interference, and (2) this
device must accept any interference, including
interference that may cause undesired operation of
the device.
Le présent appareil est conforme aux CNR
d'Industrie Canada applicables aux appareils radio
exempts de licence. L'exploitation est autorisée
aux deux conditions suivantes: (1) l'appareil ne doit
pas produire de brouillage, et (2) l'utilisateur de
l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible
d'en compromettre le fonctionnement.
MRF24WB0MB module testing was performed with the
antenna types listed in Table 2-2 in Section 2.8, External Antenna.
3.1.4
HELPFUL WEB SITES
Federal Communications Commission (FCC):
http://www.fcc.gov.
FCC Office of Engineering and Technology (OET)
Laboratory Division Knowledge Database (KDB):
http://apps.fcc.gov/oetcf/kdb/index.cfm.
DS70632C-page 22
 2010-2013 Microchip Technology Inc.
MRF24WB0MA/MRF24WB0MB
Transmitter Antenna (from Section 7.1.2, RSS-Gen,
Issue 3, December 2010): User manuals for transmitters must display the following notice in a conspicuous
location:
Under Industry Canada regulations, this radio
transmitter may only operate using an antenna of a
type and maximum (or lesser) gain approved for
the transmitter by Industry Canada. To reduce
potential radio interference to other users, the
antenna type and its gain should be so chosen that
the equivalent isotropically radiated power (e.i.r.p.)
is not more than that necessary for successful
communication.
Conformément à la réglementation d'Industrie
Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par
Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à l'intention des
autres utilisateurs, il faut choisir le type d'antenne
et son gain de sorte que la puissance isotrope rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité
nécessaire
à
l'établissement
d'une
communication satisfaisante.
The above notice may be affixed to the device instead
of displayed in the user manual.
User manuals for transmitters equipped with
detachable antennas shall also contain the following
notice in a conspicuous location:
This radio transmitter (identify the device by certification number, or model number if Category II) has
been approved by Industry Canada to operate with
the antenna types listed below with the maximum
permissible gain and required antenna impedance
for each antenna type indicated. Antenna types not
included in this list, having a gain greater than the
maximum gain indicated for that type, are strictly
prohibited for use with this device.
Conformément à la réglementation d'Industrie
Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par
Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à l'intention des
autres utilisateurs, il faut choisir le type d'antenne
et son gain de sorte que la puissance isotrope rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité
nécessaire
à
l'établissement
d'une
communication satisfaisante.
After the preceding notice, the manufacturer must provide a list of all antenna types approved for use with the
transmitter, indicating the maximum permissible
antenna gain (in dBi) and required impedance for each.
 2010-2013 Microchip Technology Inc.
3.2.2
APPROVED EXTERNAL ANTENNA
TYPES
Transmitter Antenna (from Section 7.1.2 RSS-Gen,
Issue 3, December 2010):
The MRF24WB0MA/MRF24WB0MB module can only
be sold or operated with antennas with which it was
approved. Transmitter may be approved with multiple
antenna types. An antenna type comprises antennas
having similar in-band and out-of-band radiation patterns. Testing shall be performed using the highest gain
antenna of each combination of transmitter and
antenna type for which approval is being sought, with
the transmitter output power set at the maximum level.
Any antenna of the same type having equal or lesser
gain as an antenna that had been successfully tested
with the transmitter, will also be considered approved
with the transmitter, and may be used and marketed
with the transmitter.
When a measurement at the antenna connector is
used to determine RF output power, the effective gain
of the device’s antenna shall be stated, based on
measurement or on data from the antenna
manufacturer. For transmitters of output power greater
than 10 milliwatts, the total antenna gain shall be added
to the measured RF output power to demonstrate
compliance to the specified radiated power limits.
Approved
external
antenna
types
for
the
MRF24WB0MB module are listed in Table 2-2 in
Section 2.8, External Antenna.
3.2.3
HELPFUL WEB SITES
Industry Canada: http://www.ic.gc.ca/.
3.3
Europe
The MRF24WB0MA/MRF24WB0MB module is an
R&TTE Directive assessed radio module that is CE
marked, and manufactured and tested with the intention of being integrated into a final product.
The MRF24WB0MA/MRF24WB0MB module tested to
R&TTE Directive 1999/5/EC Essential Requirements for
Health and Safety (Article (3.1(a)), Electromagnetic Compatibility (EMC) (Article 3.1(b)), and Radio (Article 3.2)
and are summarized in Table 3-1. A Notified Body Opinion has also been issued. All test reports are available on
the MRF24WB0MA/MRF24WB0MB product web page at
http://www.microchip.com.
The R&TTE Compliance Association provides guidance on modular devices in the document “Technical
Guidance Note 01”, which is available at http://
www.rtteca.com/html/download_area.htm.
DS70632C-page 23
MRF24WB0MA/MRF24WB0MB
does not require further involvement of an R&TTE
Directive Notified Body for the final product. See
Section 2.3.4, Standby State.
Note: To maintain conformance to the testing listed
in Table 3-1: European Compliance Testing, the
module shall be installed in accordance with the
installation instructions in this data sheet and shall
not be modified.
The European Compliance Testing listed in Table 3-1
was performed using the antenna types listed in
Section 2.8, External Antenna.
When integrating a radio module into a completed
product the integrator becomes the manufacturer
of the final product and is therefore responsible for
demonstrating compliance of the final product with
the essential requirements of the R&TTE Directive.
3.3.1
3.3.3
A document that can be used as a starting point in
understanding the use of Short Range Devices (SRD) in
Europe is the European Radio Communications Committee (ERC) Recommendation 70-03 E, which can be
downloaded from the European Radio Communications
Office (ERO) at: http://www.ero.dk/.
LABELING AND USER
INFORMATION REQUIREMENTS
The label on the final product which contains the
MRF24WB0MA/MRF24WB0MB module must follow CE
marking requirements. The R&TTE Compliance Association document “Technical Guidance Note 01” provides
guidance on final product CE marking.
3.3.2
Additional helpful web sites are:
• Radio and Telecommunications Terminal Equipment
(R&TTE):
http://ec.europa.eu/enterprise/rtte/index_en.htm.
• European Conference of Postal and Telecommunications Administrations (CEPT):
EXTERNAL ANTENNA
REQUIREMENTS
http://www.cept.org
From the R&TTE Compliance Association document
Technical Guidance Note 01:
• European Telecommunications Standards Institute
(ETSI):
Provided the integrator installing an assessed radio
module with an integral or specific antenna and
installed in conformance with the radio module manufacturer's installation instructions requires no further
evaluation under Article 3.2 of the R&TTE Directive and
TABLE 3-1:
HELPFUL WEB SITES
http://www.etsi.org
• European Radio Communications Office (ERO):
http://www.ero.dk
EUROPEAN COMPLIANCE TESTING
Certification
Standards
Article
Safety
IEC 60950-1:2001
(3.1(a))
TUV Rheinland 30883573.001
2009-03-11
EN 301 489-1 V1.8.1 (2008-04)
(3.1(b))
30853571.004
2009-03-16
(3.2)
30853571.003
2009-04-28
EMC
Laboratory
Report Number
Date
EN 301 489-17 V1.2.1 (2002-04)
Radio
3.4
EN 300 328 V1.7.1 (2006-10)
Australia
The Australia radio regulations do not provide a modular approval policy similar to the United States (FCC)
and Canada (IC). However, MRF24WB0MA/
MRF24WB0MB module RF transmitter test reports can
be used in part to demonstrate compliance in accordance with ACMA Radio communications “Short
Range Devices” Standard 2004 (The Short Range
Devices standard calls up the AS/NZS 4268:2008
industry
standard).
The
MRF24WB0MA/
MRF24WB0MB module test reports can be used as
part of the product certification and compliance folder.
For more information on the RF transmitter test reports,
contact Microchip Technology Australia sales office.
To meet overall Australian final product compliance, the
developer must construct a compliance folder
containing all relevant compliance test reports, for
example RF, EMC, electrical safety and Declaration of
DS70632C-page 24
Conformity (DoC) and so on. Integrator must know
what is required in the compliance folder for ACMA
compliance. All test reports are available on the
MRF24WB0MA/MRF24WB0MB product web page at
http://www.microchip.com. For more information on
Australia compliance, refer to the Australian
Communications and Media Authority web site http://
www.acma.gov.au/.
3.4.1
EXTERNAL ANTENNA
REQUIREMENTS
The compliance testing listed in Table 3-1 was performed using the antenna types listed in Table 2-2 in
Section 2.8, External Antenna.
3.4.2
HELPFUL WEB SITES
The Australian Communications and Media Authority:
http://www.acma.gov.au/.
 2010-2013 Microchip Technology Inc.
MRF24WB0MA/MRF24WB0MB
3.5
New Zealand
The New Zealand radio regulations do not provide a
modular approval policy similar to the United States
(FCC) and Canada (IC). However, MRF24WB0MA/
MRF24WB0MB module RF transmitter test reports can
be used in part to demonstrate compliance against the
New Zealand “General User Radio License for Short
Range Devices”. New Zealand Radio communications
(Radio Standards) Notice 2010 calls up the AS/NZS
4268:2008 industry standard. The MRF24WB0MA/
MRF24WB0MB module test reports can be used as
part of the product certification and compliance folder.
All test reports are available on the MRF24WB0MA/
MRF24WB0MB product web page at http://www.microchip.com. For more information on the RF transmitter
test reports, contact Microchip Technology sales office.
Information on the New Zealand short range devices
license can be found in the following web sites:
http://www.rsm.govt.nz/cms/licensees/types-oflicence/
general-user-licences/short-range-devices.
and
To meet overall New Zealand final product compliance,
the developer must construct a compliance folder with
all relevant compliance test reports, for example RF,
EMC, electrical safety and DoC (Declaration of Conformity) etc. The developer must know what is required in
the compliance folder for New Zealand Radio communications. For more information on New Zealand compliance, refer to the web site http://www.rsm.govt.nz/.
EXTERNAL ANTENNA
REQUIREMENTS
The compliance testing listed in Table 3-1 was performed using the antenna types listed in Table 2-2 in
Section 2.8, External Antenna.
3.5.2
HELPFUL WEB SITES
Radio Spectrum Ministry of Economic Development:
http://www.rsm.govt.nz/.
3.6
Korea
The MRF24WB0MA/MRF24WB0MB module has
received certification of conformity in accordance with
the Radio Waves Act. Integration of this module into a
final product does not require additional radio
certification provided installation instructions are
followed and no modifications of the module are
allowed.
 2010-2013 Microchip Technology Inc.
LABELING AND USER
INFORMATION REQUIREMENTS
The label on the final product which contains the
MRF24WB0MA/MRF24WB0MB module must follow
KC marking requirements. The integrator of the module
should refer to the labeling requirements for Korea
available on the Korea Communications Commission
(KCC) web site.
The MRF24WB0MA/MRF24WB0MB module is labeled
with its own KC mark. The final product requires the KC
mark and certificate number of the module:
3.6.2
EXTERNAL ANTENNA
REQUIREMENTS
The Korea compliance testing was performed using the
antenna types listed in Table 2-2 in Section 2.8, External
Antenna.
3.6.3
http://www.rsm.govt.nz/cms/policy-and-planning/spectrum-policy-overview/legislation/gazette-notices/product-compliance/radiocommunications-radiostandardsnotice-2010.
3.5.1
3.6.1
HELPFUL WEB SITES
Korea Communications Commission (KCC):
http://www.kcc.go.kr.
National Radio Research Agency (RRA):
http://rra.go.kr.
3.7
Other Regulatory Jurisdictions
Other regulatory jurisdiction certification must be
required by the customer, or the customer need to
recertify the module for other reasons, a certification
utility is available. The utility runs on a Window’s PC
and utilizes a USB to SPI converter to interface to the
MRF24WB0M module. To use the utility, the
MRF24WB0M module must be out of Reset and not
accessed by the system host. That is, the SPI signals
to the MRF24WB0M must be tri-state, with Reset and
Hibernate deasserted. The following signals will need
to be brought from the MRF24WB0M for connection to
the PC (through the USB adapter):
•
•
•
•
•
•
SDO
SDI
CS
SCK
INT
GND
For further regulatory Certification Utility and
documentation, contact local Microchip sales office.
DS70632C-page 25
MRF24WB0MA/MRF24WB0MB
3.8
Wi-Fi® Alliance
Wi-Fi Alliance Certification focuses on interoperability
testing of devices based on 802.11 standards.
Historically, when the certification process and
programs were developed by Wi-Fi Alliance members,
the vast majority of the 802.11 clients were PC-centric,
and certification testing adequately addressed those
types of devices. In subsequent years, the number of
Wi-Fi devices that are not PC-centric has grown
significantly.
These non-standard devices, as a class of products,
have been dubbed Application Specific Devices
(ASDs) by the Wi-Fi Alliance. ASDs are 802.11
devices, for example clients or access points (APs),
which cannot be tested under a standard Alliance test
plan because they do not comply with the standard test
configuration, and because they are designed to
perform a specific application. For example, bar code
scanners, pagers, recording devices, monitoring
equipment, and cable modems.
The APs or clients that are used to validate ASD
compliance (from the standard test bed) will meet all of
the requirements specified in the applicable System
Interoperability Test Plans (referred to as the “standard
test plan”), unless specifically exempted. The
MRF24WB0MA and MRF24WB0MB modules are in
the ASD category.
The modules are certified under Wi-Fi 802.11 with
WPA2, WPA, and WEP System Interoperability ASD
Model Test Plan with Test Engine For IEEE 802.11a, b,
and g Devices (Version 1.0).
DS70632C-page 26
Per the Wi-Fi Alliance approved ASD test plan, the
definition of the Microchip MRF24WB0MA and
MRF24WB0MB modular solutions is expressed in the
following statements:
“Member Wireless solution is a single-chip
802.11b module including MAC, baseband, RF
and power amplifier personal STA. It utilizes a
simple to use API for embedded markets, and an
OS is not a requirement for operation. It supports
1 and 2 Mbps (TX and RX). It also supports WEP,
WPA Personal, and WPA2 Personal security.
Ciphers supported are AES and TKIP. The
Member Wireless solution interfaces with the
HOST through SPI Bus. Some applications for
the Member Wireless solution are as following:
• Sensors/Controls such as Industrial and Factory
sensors, HVAC, and Lighting
• Consumer Electronic such as remote controls,
toys, and internet radio
This certification ensures that the MRF24WB0MA
and MRF24WB0MB modules have passed
rigorous testing for interoperability across existing
consumer and business Wi-Fi equipments, and
their certifications are completed (WFA ID:
WFA7150). The certification effort undertaken will
save customers time and money. For modular
policy, refer to WFA Module Policy (Version 2.2;
MARCH 2006).
 2010-2013 Microchip Technology Inc.
MRF24WB0MA/MRF24WB0MB
4.0
ELECTRICAL
CHARACTERISTICS
TABLE 4-1:
DIGITAL ELECTRICAL CHARACTERISTICS (NOMINAL CONDITIONS: 25C,
VDD = 3.3V)
Parameters
Min
Typ
Max
Units
VIL (Input low voltage)
-0.3
—
0.8
V
VIH (Input high voltage)
2
—
5.5
V
VOL (Output low voltage)
—
—
0.4
V
VOH (Output high voltage)
2.4
—
—
V
IOL (Output low level current at VOL Max)
—
8.5
—
mA
IOH (Output high level current at VOH Min)
—
15.4
—
mA
TABLE 4-2:
ABSOLUTE MAXIMUM RATINGS(1)
Parameters
Min
Max
Storage Temperature
-40C
+125C
0V
4.2V for 0.5 mS
VDD
Notes
—
VDD above this level and duration will disable Radio
VIN on SDI, CS, SCK
-0.3V
5.5V
—
Note 1: Listed Absolute Maximum Ratings are not meant for functional operation. Operation at these levels is not
guaranteed, and may reduce the operating life of the component.
TABLE 4-3:
RECOMMENDED OPERATING CONDITIONS
Parameters
Min
Typ
Max
Units
Ambient Temperature
-40
—
+85
Degrees Celsius
3.63(1)
VDD – for FCC and IC
2.70
3.3
Volts
Note 1: While 3.63V is the maximum operating voltage, the module will detect an overvoltage condition at 4.2V and
disable the RF Transmit function after 0.5 ms. This is an RF certification requirement pertaining to disabling
transmission in unforeseen over-voltage conditions.
 2010-2013 Microchip Technology Inc.
DS70632C-page 27
MRF24WB0MA/MRF24WB0MB
TABLE 4-4:
CURRENT CONSUMPTION(3) (NOMINAL CONDITIONS: 25C, VDD = 3.3V)
Parameters
IDD, Hibernate = 3.3V
Min
Typ
Max
Units
—
0.1
—
µA
(1)
IDD, Sleep (software enabled)
—
250
—
µA
IDD, Standby (transitional state)
—
10
—
mA
IDD core(2), RX on, Receive @-83 dBm with 2 Mbps
modulated signal at antenna port
—
85
—
mA
IDD core, TX on, +0 dBm
—
115
—
mA
IDD core, TX on, +10 dBm
—
154
—
mA
Note 1: Sleep current is current consumed during periods of “standby” between DTIM beacons. The module will
awake 2 mS before a DTIM and turn on its receiver, and possibly its transmitter (if data is available for it).
2: IDD core is current consumed by the part not including the I/O consumption of the SPI port.
3: Current Consumption values represent Typical Peak currents, and the measured current conditions were done
with 85% duty cycle modulated signal. Wi-Fi® applications typically operate at less than 85% TX duty cycle. TX
current is dependent on such criteria as transmit power setting, and transmit data rate and bandwidth being
used. RX current is affected by connection distance.
TABLE 4-5:
RECEIVER AC CHARACTERISTICS(1)
Parameters
Min
Typ
Max
Units
Flo
2412
—
2484
MHz
RX Min Input Level Sensitivity, 1 Mbps, 8% PER
—
-91
—
dBm
RX Min Input Level Sensitivity, 2 Mbps, 8% PER
—
-88
—
dBm
RX Max Input Level (Power), 1 Mbps, 8% PER
—
-4
—
dBm
RX Max Input Level (Power), 2 Mbps, 8% PER
—
-4
—
Note 1: Nominal conditions: 25C, VDD = 3.3V, Flo = 2437 MHz, measurements at antenna port.
dBm
TABLE 4-6:
TRANSMITTER AC CHARACTERISTICS(1)
Parameters
Min
Typ
Max
Units
Flo
2412
—
2484
MHz
Average Pout (transmit spectrum mask compliant)
—
+10
—
dBm
Average Pout gain step resolution from +5 to +10 dBm
—
0.5
—
dB
Average Pout gain step resolution from -5 to +5 dbm
—
1.0
—
dB
Average Pout settled variation
-0.5
—
0.5
dB
Note 1: Nominal conditions: 25C, VDD = 3.3V, Flo = 2437 MHz, 2 Mbps. modulated signal measured at antenna
port.
DS70632C-page 28
 2010-2013 Microchip Technology Inc.
MRF24WB0MA/MRF24WB0MB
FIGURE 4-1:
SPI INPUT TIMING
TCSD
TSCK
CS
TCSH
TCSS
SCK
TSU
SI
THD
MSb In
LSb In
High-Impedance
SO
CS must be toggled for each SPI block transfer.
FIGURE 4-2:
SPI OUTPUT TIMING
CS
TSCK
SCK
TV
SO
TV
TDIS
MSb Out
LSb Out
Don’t Care
SI
LSb In
TABLE 4-7:
SPI INTERFACE AC CHARACTERISTICS
Symbol
Parameters
Min
Max
Units
TSCK
SCK Period
40
—
nS
TCSD
CS High time
50
—
nS
TCSS
CS Setup time
50
—
nS
TCSH
CS Hold time
50
—
nS
TSU
SDI Setup time
10
—
nS
THD
SDI Hold time
10
—
nS
TV
SDO Valid time
—
15
nS
 2010-2013 Microchip Technology Inc.
DS70632C-page 29
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NOTES:
DS70632C-page 30
 2010-2013 Microchip Technology Inc.
MRF24WB0MA/MRF24WB0MB
APPENDIX A:
REVISION HISTORY
Revision A (April 2010)
This is the initial released version of the document.
Revision B (June 2011)
This revision includes the following updates:
• Updated section Operational Changed
temperature range to -20° C to +85° C
• Updated Table 1-1: Added type and pin
description to pin 23.
• Updated Table 4-3
• Replaced Figure 2-2
• Updated Section 2.0, Circuit Description
• Added Section 3.7, Other Regulatory Jurisdictions
• Updated the temperature on the order code in
section Product Identification System
• Minor changes to the text and formatting were
incorporated throughout the document
Revision C (May 2013)
• Updated the standard temperature specification to
industrial
• Correction on bias for JTAG_TCK
• Minor changes to the text and formatting were
incorporated throughout the document
 2010-2013 Microchip Technology Inc.
DS70632C-page 31
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NOTES:
DS70632C-page 32
 2010-2013 Microchip Technology Inc.
MRF24WB0MA/MRF24WB0MB
THE MICROCHIP WEB SITE
CUSTOMER SUPPORT
Microchip provides online support via our WWW site at
www.microchip.com. This web site is used as a means
to make files and information easily available to
customers. Accessible by using your favorite Internet
browser, the web site contains the following
information:
Users of Microchip products can receive assistance
through several channels:
• Product Support – Data sheets and errata,
application notes and sample programs, design
resources, user’s guides and hardware support
documents, latest software releases and archived
software
• General Technical Support – Frequently Asked
Questions (FAQs), technical support requests,
online discussion groups, Microchip consultant
program member listing
• Business of Microchip – Product selector and
ordering guides, latest Microchip press releases,
listing of seminars and events, listings of
Microchip sales offices, distributors and factory
representatives
•
•
•
•
•
Distributor or Representative
Local Sales Office
Field Application Engineer (FAE)
Technical Support
Development Systems Information Line
Customers
should
contact
their
distributor,
representative or field application engineer (FAE) for
support. Local sales offices are also available to help
customers. A listing of sales offices and locations is
included in the back of this document.
Technical support is available through the web site
at: http://microchip.com/support
CUSTOMER CHANGE NOTIFICATION
SERVICE
Microchip’s customer notification service helps keep
customers current on Microchip products. Subscribers
will receive e-mail notification whenever there are
changes, updates, revisions or errata related to a
specified product family or development tool of interest.
To register, access the Microchip web site at
www.microchip.com. Under “Support”, click on
“Customer Change Notification” and follow the
registration instructions.
 2010-2013 Microchip Technology Inc.
DS70632C-page 33
MRF24WB0MA/MRF24WB0MB
READER RESPONSE
It is our intention to provide you with the best documentation possible to ensure successful use of your Microchip
product. If you wish to provide your comments on organization, clarity, subject matter, and ways in which our
documentation can better serve you, please FAX your comments to the Technical Publications Manager at
(480) 792-4150.
Please list the following information, and use this outline to provide us with your comments about this document.
TO:
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Application (optional):
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Device: MRF24WB0MA/MRF24WB0MB
Literature Number: DS70632C
Questions:
1. What are the best features of this document?
2. How does this document meet your hardware and software development needs?
3. Do you find the organization of this document easy to follow? If not, why?
4. What additions to the document do you think would enhance the structure and subject?
5. What deletions from the document could be made without affecting the overall usefulness?
6. Is there any incorrect or misleading information (what and where)?
7. How would you improve this document?
DS70632C-page 34
 2010-2013 Microchip Technology Inc.
MRF24WB0MA/MRF24WB0MB
PRODUCT IDENTIFICATION SYSTEM
To order parts, including industrial, or obtain information, for e.g., on pricing or delivery, refer to the factory or the listed sales office.
PART NO.
M
X
T
-X
Device
Module
Module
Type
Tape and
Reel
Temperature
Range
Device
Temperature Range
Examples:
a)
b)
MRF24WB0MA/RM = Industrial temp. tray
MRF24WB0MB/RM = Industrial temp. tray
MR24WB0MA/MRF24WB0MB;
VDD range 2.7V to 3.6V
-40C to
 2010-2013 Microchip Technology Inc.
+85C
(Industrial Temp)
DS70632C-page 35
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NOTES:
DS70632C-page 36
 2010-2013 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices:
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
•
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at
the buyer’s risk, and the buyer agrees to defend, indemnify and
hold harmless Microchip from any and all damages, claims,
suits, or expenses resulting from such use. No licenses are
conveyed, implicitly or otherwise, under any Microchip
intellectual property rights.
Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
FlashFlex, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro,
PICSTART, PIC32 logo, rfPIC, SST, SST Logo, SuperFlash
and UNI/O are registered trademarks of Microchip Technology
Incorporated in the U.S.A. and other countries.
FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor,
MTP, SEEVAL and The Embedded Control Solutions
Company are registered trademarks of Microchip Technology
Incorporated in the U.S.A.
Silicon Storage Technology is a registered trademark of
Microchip Technology Inc. in other countries.
Analog-for-the-Digital Age, Application Maestro, BodyCom,
chipKIT, chipKIT logo, CodeGuard, dsPICDEM,
dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial
Programming, ICSP, Mindi, MiWi, MPASM, MPF, MPLAB
Certified logo, MPLIB, MPLINK, mTouch, Omniscient Code
Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit,
PICtail, REAL ICE, rfLAB, Select Mode, SQI, Serial Quad I/O,
Total Endurance, TSHARC, UniWinDriver, WiperLock, ZENA
and Z-Scale are trademarks of Microchip Technology
Incorporated in the U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
GestIC and ULPP are registered trademarks of Microchip
Technology Germany II GmbH & Co. & KG, a subsidiary of
Microchip Technology Inc., in other countries.
All other trademarks mentioned herein are property of their
respective companies.
© 2010-2013, Microchip Technology Incorporated, Printed in
the U.S.A., All Rights Reserved.
Printed on recycled paper.
ISBN: 978-1-62077-226-3
QUALITY MANAGEMENT SYSTEM CERTIFIED BY DNV == ISO/TS 16949 ==  2010-2013 Microchip Technology Inc.
Microchip received ISO/TS-16949:2009 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
DS70632C-page 37
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DS70632C-page 38
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11/29/12
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