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Freescale Semiconductor, Inc.
Data Sheet: Technical Data
Document Number: QFM2202DS
Rev. 0, 03/2015
Wi-Fi Module QFM-2202
1. Overview
QFM-2202 Wi-Fi module is developed by Freescale and
Qualcomm Atheros. The module is certified and
suitable for low-power and low-cost IoT appllications
such as Smart Grid, Home and Building Automation,
Security Surveillance, Smart Appliance, Remote
Medical Care, etc.
The industrial leading ARM Cortex-M4 Kinetis MCU,
Wi-Fi MAC/BB/RF/PA/LNA, on-board antenna, and
optional MFi interface are all integrated on the smallsize module. QFM-2202 Wi-Fi module includes 512KB
Flash, 128KB memory RAM and various peripheral
interfaces.
This module supports IEEE 802.11 b/g/n protocol,
complete TCP/IP protocol stack, and IoT application
architecture AllJoyn. Users can use this module, either
to add internet function for existed devices, or to
generate independent network controller.
© 2015 Freescale Semiconductor, Inc. All rights reserved.
Contents
1.
2.
3.
4.
5.
6.
7.
Overview
1
Features
2
2.1.
Operating voltage .................................................... 2
2.2.
Operating temperatue .............................................. 2
2.3.
CPU Cortex-M4 @ 120MHz .................................. 2
2.4.
Wi-Fi system ........................................................... 2
2.5.
Software and stack .................................................. 2
2.6.
Suitable integrated development environment ........ 2
Hardware Specification
3
3.1.
System block diagram ............................................. 3
3.2.
Module signal description ....................................... 3
3.3.
Module GPIO pin functions .................................... 5
3.4.
Electrical characteristics ......................................... 6
3.5.
Power up sequence.................................................. 8
3.6.
Power consumption................................................. 8
3.7.
RF characteristics .................................................... 9
Layout Guide
13
Mechanical Interface Specification
15
Ordering Information
16
Revision History
16
Features
2. Features
2.1. Operating voltage
3.3 V
2.2. Operating temperatue
-40 °C - 105 °C
2.3. CPU Cortex-M4 @ 120MHz
•
•
Flash: 512 KB
Memory: 128 KB
2.4. Wi-Fi system
•
•
•
•
•
•
•
•
•
•
IEEE 802.11 b/g/n
Single stream 1x1
Single-band 2.4 GHz
Green Tx power saving mode
Low power listen mode
Data rates up to 150 Mbps
Data rates up to 52 Mbps for 802.11 b/g, data rates up to 150 Mbps for 802.11n (MCS0-7).
Networking protocol support: IPv4/IPv6, TCP/UDP, ARP/NDP, DHCPv4, ICMPv6
Full security support: WPS, WPA, WPA2, WAPI, WEP, TKIP
Each Tx power calibrated
2.5. Software and stack
•
•
•
•
•
•
Real Time OS : MQX
Architecture of internet software: Alljoyn
iOS homekit frame and MFi supported
Bootloader encrypted with RSA2048/SHA-256
Update firmware via Wi-Fi or UART
Drivers of interfaces of MCU
2.6. Suitable integrated development environment
•
IAR EWARM V7.10 or above
Wi-Fi Module QFM-2202 Data Sheet: Technical Data Rev. 0 03/2015
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Freescale Semiconductor, Inc.
Hardware Specification
•
GCC ARM V4.8.4 or above
3. Hardware Specification
3.1. System block diagram
VDD_MCU
VDD33
24MHz
XTAL
40MHz
XTAL
4Mb SPI
Flash
2 x UART
1 x USB
1 x I2S
2.4G
Antenna
SPI_BUS
2 x ADC
MK22FN512VMP12
1 x DAC
SPI_INT_Wifi
QCA4002
PIN 2, 3, 4, 5, 36
Reserved for factory use
1 x SPI
CHIP_PWD_L_MCU
1 x JTAG
nRESET
GPIO
1 x JTAG
1 x UART
EZP_nCS
1 x I2C1
MFi
OPTIONAL
1 x I2C0
QFM - 2202
Figure 1 QFM-2202 system block diagram
3.2. Module signal description
Figure 2 QFM-2202 QFM-2202 top view
Wi-Fi Module QFM-2202 Data Sheet: Technical Data Rev. 0 03/2015
Freescale Semiconductor, Inc.
3
Hardware Specification
Figure 3 QFM-2202 pinout top view
Table 1 QFM-2202 pin assignment and description
Signal name
GND
VDD_MCU
VDD33
RSV
USB_MCU_DM
USB_MCU_DP
ADC0_DP0
ADC0_DP3
DAC0_OUT
nRESET
1
EZP_nCS
SPI1_EXT_CS0
SPI1_EXT_SIN
SPI1_EXT_SOUT
SPI1_EXT_CLK
JTAG_MCU_TCLK
JTAG_MCU_TDI
Pin
1，19，29，47
27
35
2，3，4，5，36
14
15
16
17
18
28
23
6
7
8
9
10
11
Type
Description
Power
Power
Power
N/A
Ground
3.3V power supply for K22
3.3V power supply for QCA4002
Reserved for factory use, NC
USB FS/LS OTG controller with onchip transceiver.
AI
AI
AO
DI
2
DI
2
DIO
2
DI
2
DO
2
DIO
2
DI
2
DI
16-bit SAR ADCs converting at 1.2 MS/s in 12bit mode.
12-bit DAC.
K22 POR reset, active LOW.
EzPort Chip Select
Peripheral Chip Select
Serial Data In
Serial Data Out
Serial Clock
JTAG Test Clock / Serial Wire Clock
JTAG Test Data Input
Wi-Fi Module QFM-2202 Data Sheet: Technical Data Rev. 0 03/2015
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Freescale Semiconductor, Inc.
Hardware Specification
Signal name
Pin
Type
2
JTAG_MCU_TDO
JTAG_MCU_nTRST
JTAG_MCU_TMS
I2C1_DAT
I2C1_CLK
I2C0_DAT
I2C0_CLK
MCU_UART0_RXD
MCU_UART0_RTS
MCU_UART0_CTS
MCU_UART0_TXD
MCU_UART1_RXD
MCU_UART1_TXD
MCU_UART1_CTS
MCU_UART1_RTS
I2S0_TXD0
21
22
32
12
13
25
26
20
30
31
34
38
40
41
42
24
DO
2
DI
2
DIO
2
DIO
2
DIO
2
DIO
2
DIO
2
DI
2
DO
2
DI
2
DO
2
DI
2
DO
2
DI
2
DO
2
DO
I2S0_TX_BCLK
33
DIO
I2S0_TX_FS
39
DIO
I2S0_RXD0
43
DI
I2S0_RX_BCLK
44
DIO
I2S0_MCLK
45
DIO
I2S0_RX_FS
46
DIO
MCU_GPIO5
37
DIO
1.
2
2
2
2
2
2
Description
JTAG Test Data Output
JTAG Reset
JTAG Test Mode Selection / Serial Wire Data
Bidirectional serial data line of the I2C system
Bidirectional serial clock line of the I2C system
Bidirectional serial data line of the I2C system
Bidirectional serial clock line of the I2C system
Receive data
Request to send
Clear to send
Transmit data
Receive data
Transmit data
Clear to send
Request to send
Transmit Data. The transmit data is generated synchronously
by the bit clock and is tristated whenever not transmitting a
word.
Transmit Bit Clock. The bit clock is an input when externally
generated and an output when internally generated.
Transmit Frame Sync. The frame sync is an input sampled
synchronously by the bit clock when externally generated and
an output generated synchronously by the bit clock when
internally generated.
Receive Data. The receive data is sampled synchronously by
the bit clock.
Receive Bit Clock. The bit clock is an input when externally
generated and an output when internally generated.
Audio Master Clock. The master clock is an input when
externally generated and an output when internally generated.
Receive Frame Sync. The frame sync is an input sampled
synchronously by the bit clock when externally generated and
an output generated synchronously by the bit clock when
internally generated.
2
Minimum 2 bus clock cycles of EZP_nCS=0 after reset will force K22 enter into EZP mode.
2. All IOs are with multiplexed functions. See table-2 for details.
3.3. Module GPIO pin functions
Table 2 QFM-2202 GPIO pin functions
Signal
EZP_nCS
Pin
23
SPI1_EXT_CS0
6
Default
NMI_b/
EZP_CS_b
DISABLED
SPI1_EXT_SIN
SPI1_EXT_SOU
T
7
8
DISABLED
ADC0_SE7b
SPI1_EXT_CLK
9
ADC0_SE6b
JTAG_MCU_TCL
K
10
JTAG_MCU_TDI
11
JTAG_MCU_TD
21
JTAG_TCLK
/SWD_CLK/
EZP_CLK
JTAG_TDI/E
ZP_DI
JTAG_TDO/
ALT0
ADC0_SE7b
ADC0_
SE6b
ALT1
PTA4/
LLWU_P3
PTD4/
LLWU_P1
4
PTD7
PTD6/
LLWU_P1
5
PTD5
ALT2
ALT3
FTM0_CH1
ALT4
ALT5
ALT6
ALT7
NMI_b
SPI0_PCS1
UART0_RTS_
b
FTM0_CH4
FB_AD2
EWM_IN
SPI1_PCS0
UART0_TX
UART0_RX
FTM0_CH7
FTM0_CH6
FB_AD0
FTM0_FLT1
FTM0_FLT0
SPI1_SIN
SPI1_SOUT
FB_AD1
EWM_OUT_b
SPI1_SCK
UART0_CTS_
b
UART0_CTS_
b
FTM0_CH5
FTM0_CH5
PTA0
PTA1
UART0_RX
PTA2
UART0_TX
SPI0_PCS3
SPI0_PCS2
EzPort
EZP_CS
_b
JTAG_TCLK/S
WD_CLK
EZP_CL
K
FTM0_CH6
JTAG_TDI
EZP_DI
FTM0_CH7
JTAG_TDO/TR
EZP_DO
Wi-Fi Module QFM-2202 Data Sheet: Technical Data Rev. 0 03/2015
Freescale Semiconductor, Inc.
5
Hardware Specification
Signal
O
Pin
JTAG_MCU_nTR
ST
JTAG_MCU_TM
S
I2C1_DAT
22
12
JTAG_TMS/
SWD_DIO
ADC1_SE4a
I2C1_CLK
13
ADC1_SE5a
I2C0_DAT
25
I2C0_CLK
26
MCU_UART0_R
XD
MCU_UART0_R
TS
MCU_UART0_C
TS
MCU_UART0_TX
D
MCU_UART1_R
XD
MCU_UART1_TX
D
MCU_UART1_C
TS
MCU_UART1_R
TS
I2S0_TXD0
20
ADC0_SE9/
ADC1_SE9
ADC0_SE8/
ADC1_SE8
DISABLED
30
ADC0_SE12
31
ADC0_SE13
34
DISABLED
38
CMP1_IN1
40
DISABLED
41
24
ADC0_SE4b
/ CMP1_IN0
ADC0_
SE15
DISABLED
I2S0_BCLK
33
DISABLED
I2S0_TX_FS
39
DISABLED
I2S0_RXD0
43
DISABLED
SPI0_SCK
I2S0_RX_BCLK
44
CMP0_IN0
CMP0_IN0
I2S0_MCLK
45
ADC1_SE4b
/ CMP0_IN2
I2S0_RX_FS
46
ADC1_
SE4b/
CMP0_IN2
CMP0_IN1
PTC5/LLW
U_P9
PTC6/LLW
U_P10
PTC8
CMP0_IN1
PTC7
SPI0_SIN
MCU_GPIO5
37
ADC0_
SE14
ADC0_
SE14
PTC0
SPI0_PCS4
32
42
Default
TRACE_SW
O/EZP_DO
DISABLED
ALT0
ADC1_
SE4a
ADC1_
SE5a
ADC0_SE9/
ADC1_SE9
ADC0_SE8/
ADC1_SE8
ADC0_
SE12
ADC0_
SE13
CMP1_IN1
ADC0_SE4b
/ CMP1_IN0
ADC0_
SE15
ALT1
ALT2
ALT3
PTA5
USB_ CLKIN
FTM0_CH2
PTA3
UART0_RTS_
b
SPI1_PCS1
FTM0_CH0
UART1_TX
I2C1_SDA
JTAG_TMS/SW
D_DIO
RTC_CLKOUT
SPI1_ SOUT
UART1_RX
I2C1_SCL
SPI1_SIN
I2C0_SDA
FTM1_CH1
PTB0/
LLWU_P5
PTB16
I2C0_SCL
FTM1_CH0
SPI1_ SOUT
UART0_RX
FTM1_QD_P
HB
FTM1_QD_P
HA
EWM_IN
PTB2
I2C0_SCL
PTB3
I2C0_SDA
PTB17
SPI1_SIN
UART0_RTS_
b
UART0_CTS_
b
UART0_TX
FTM_CLKIN1
PTC3/LLW
U_P7
PTC4/LLW
U_P8
PTC2
SPI0_PCS1
UART1_RX
FTM0_CH2
SPI0_PCS0
UART1_TX
FTM0_CH3
SPI0_PCS2
FTM0_CH1
PTC1/LLW
U_P6
PTA12
SPI0_PCS3
UART1_CTS_
b
UART1_RTS_
b
FTM1_CH0
PTB18
FTM2_CH0
PTB19
FTM2_CH1
I2S0_TX_BCL
K
I2S0_TX_FS
PTE0/
CLKOUT3
2K
PTE1/LLW
U_P0
PTB1
SPI0_ SOUT
ALT4
ALT5
FTM_CLKIN0
FB_AD1
7
ALT6
ALT7
ACE_SWO
EzPort
I2S0_TX_BCL
K
JTAG_TRST_b
FTM0_FLT3
FTM0_ FLT0
FB_AD1
6
CLKOUT
FB_AD1
1
FB_AD1
2
FB_AD1
3
FTM0_CH0
EWM_OUT_b
I2S0_TX_BCL
K
CMP1_OUT
LPUART0_RX
I2S0_TX_ FS
LPUART0_CTS
_b
LPUART0_RTS
_b
FTM1_QD_PH
A
I2S0_TXD0
I2S0_TXD0
FB_AD1
5
FB_OE_
b
FB_AD1
0
FB_AD9
LPTMR0_ALT
2
PDB0_EXTR
G
FTM3_CH4
I2S0_RXD0
USB_SOF_O
UT
PDB0_EXTR
G
I2S0_RX_FS
FB_AD8
USB_SOF_O
UT
FB_AD1
4
I2S0_RX_BC
LK
I2S0_MCLK
FTM2_QD_P
HA
FTM2_QD_P
HB
CMP0_OUT
LPUART0_TX
FTM0_CH2
I2S0_MCLK
FB_AD7
3.4. Electrical characteristics
3.4.1. Absolute maximum ratings
Table 3 QFM-2202 absolute maximum ratings
Symbol
VDD_MCU
VDD33
VDIO
VAIO
ID
VUSB_DP
VUSB_DM
Description
MCU Supply Voltage
QCA4002 Supply Voltage
Digital Input Voltage
1
Analog
Maximum current single pin limit (applies to all digital pins)
USB_DP Input Voltage
USB_DM Input Voltage
Min.
-0.3
-0.3
-0.3
-0.3
-25
-0.3
-0.3
Max.
3.8
4.0
VDD_MCU +0.3
VDD_MCU +0.3
25
3.63
3.63
Unit
V
V
V
V
mA
V
V
1. Analog pins are defined as pins that do not have an associated general purpose I/O port function.
Wi-Fi Module QFM-2202 Data Sheet: Technical Data Rev. 0 03/2015
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Freescale Semiconductor, Inc.
Hardware Specification
3.4.2. Recommended operating conditions
Table 4 QFM-2202 recommended operating conditions
Symbol
VDD_MCU
VDD33
TSTG
TA
Description
MCU Supply Voltage
QCA4002 Supply Voltage
Storage temperature
Operating Temperature
Min.
2.7
3.14
-45
-40
Max.
3.6
3.46
135
105
Unit
V
V
°C
°C
Min.
0.7 x VDD_MCU
-
Max.
0.35 x VDD_MCU
Unit
V
V
VDD_MCU - 0.5
VDD_MCU - 0.5
-
V
-
0.5
0.5
100
100
V
-
0.5
0.5
1.0
uA
20
20
0.06 x VDD_MCU
50
50
-
kΩ
kΩ
V
-3
-
+3
mA
-25
-
+25
VDD_MCU
1.2
0.8
VDD_MCU
1.5
3.4.3. DC electrical characteristics
Table 5 QFM-2202 DC electrical characteristics
Symbol
VIH
VIL
VOH
VOL
IOHT
IOLT
IIN
IIN
RPU
RPD
VHYS
IICIO
IICcont
1
VODPU
VRAM
2
VPOR
Description
Input High Voltage
Input Low Voltage
Output high voltage

Normal drive pad (IOH = -5mA)

High drive pad (IOH = -20mA)
Output low voltage

Normal drive pad (IOH = 5mA)

High drive pad (IOH = 20mA)
Output high current total for all ports
Output low current total for all ports
Input leakage current (per pin) for full temperature
range

All pins other than high drive port pins

High drive port pins
Input leakage current (total all pins) for full temperature
range
Internal pullup resistors
Internal pulldown resistors
Input Hysteresis
Analog and I/O pin DC injection current - single pin

VIN < VSS - 0.3V (Negative current injection)

VIN > VDD_MCU + 0.3V (Positive current
injection)
Contiguous pin DC injection current —regional limit,
includes sum of negative injection currents or sum of
positive injection currents of 16 contiguous pins

Negative current injection

Positive current injection
Open drain pullup voltage level
VDD_mcu voltage required to retain RAM
Falling VDD_mcu POR detect voltage
mA
mA
uA
mA
V
V
V
1. All analog and I/O pins are internally clamped to VSS and VDD_mcu through ESD protection diodes. If VIN is less
than VIO_MIN or greater than VIO_MAX, a current limiting resistor is required. The negative DC injection current
limiting resistor is calculated as R=(VIO_MIN-VIN)/|IICIO|. The positive injection current limiting resistor is
calculated as R=(VINVIO_ MAX)/|IICIO|. Select the larger of these two calculated resistances if the pin is exposed to
positive and negative injection currents.
2. Typical value is 1.1 V.
Wi-Fi Module QFM-2202 Data Sheet: Technical Data Rev. 0 03/2015
Freescale Semiconductor, Inc.
7
Hardware Specification
3.5. Power up sequence
Figure 4 QFM-2202 power up sequence
3.6. Power consumption
3.6.1. Operating power consumption
Table 6 QFM-2202 operating power consumption
Mode
Tx
Standard
11b
Rate
1
11
6
54
MCS0
MCS7
MCS0
MCS7
11g
11n HT20
11n HT40
Rx
All rates
Typ
247.6
241.2
246.1
210.6
263.0
217.3
221.5
195.5
66.7
Unit
mA
mA
3.6.2. Standby power consumption
Table 7 QFM-2202 standby power consumption
Mode
Standby
Power Save Mode
(2.4G)
(Low Power Listen
1
disabled)
State
CHIP_PWD
HOST_OFF
SLEEP
DTIM period
DTIM 1
DTIM 3
DTIM 5
DTIM 10
Typical current consumption for SPI/UART at 3.3V
5uA
50uA
130uA
Current Cons. (uA)
T1 (ms)
T2 (ms)
Tbeacon (ms)
1090
2.01
0.36
0.99
473
1.99
0.32
1.06
335
1.99
0.30
1.01
258
1.97
0.43
0.97
T3 (ms)
0.39
0.41
0.41
0.47
1. Numbers are for switch mode.
Wi-Fi Module QFM-2202 Data Sheet: Technical Data Rev. 0 03/2015
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Freescale Semiconductor, Inc.
Hardware Specification
3.7. RF characteristics
3.7.1. Wireless LAN radio configuration and general specifications
Table 8 Wireless LAN radio configuration and general specifications
Item
1
Country/Domain Code
Center Frequency
Specification
Reserved
11b
11g
11n HT20
11n HT40
11b
11g
11n 1stream
11b
11g/n
Rate
Modulation type
Unit
GHz
GHz
GHz
GHz
Mbps
Mbps
Mbps
-
2.412-2.472
2.412-2.472
2.412-2.472
2.422-2.452
1, 2, 5.5, 11
6, 9, 12, 18, 24, 36, 48, 54
MCS0, 1, 2, 3, 4, 5, 6, 7
DSSS (CCK, DQPSK, DBPSK)
OFDM (64QAM, 16QAM, QPSK, BPSK)
1. This code will be written during calibration.
3.7.2. Radio Tx characteristics
Table 9 Radio Tx characteristics
Symbol
Ftx
Parameter
Tx output frequency range
Pout
Output power
11b
Conditions
-
Min
2.412
Typ
—
Max
2.484
Unit
GHz
1 Mbps
11 Mbps
6 Mbps
54 Mbps
MCS0
MCS7
MCS0
MCS7
-
18
18
18
14
18
13
16
12
-
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
1
11g
11n HT20
11n HT40
1. Performance calculated at the balun. Loss from balun to antenna connector in the test board is 1.2 dB
(2.4GHz).
3.7.3. Radio Rx characteristics
Table 10 Radio Rx characteristics
Symbol
Frx
Srf
Parameter
Rx input frequency range
1
Sensitivity
CCK
Conditions
-
Min
2.412
Typ
-
Max
2.484
Unit
GHz
1 Mbps
11 Mbps
-
-94
-86
-
dBm
dBm
Wi-Fi Module QFM-2202 Data Sheet: Technical Data Rev. 0 03/2015
Freescale Semiconductor, Inc.
9
Hardware Specification
Symbol
Parameter
OFDM
HT20
HT40
Conditions
6 Mbps
54 Mbps
MCS0
MCS7
MCS0
MCS7
Min
-
Typ
-90
-73
-90
-70
-88
-67
Max
-
Unit
dBm
dBm
dBm
dBm
dBm
dBm
1. Performance measured at the balun. Loss from balun to antenna connector in the test board is 1.2 dB
(2.4GHz).
3.7.4. Rx dynamic range (waterfall)
Figure 5 1Mbps CCK
Figure 6 11 Mbps CCK
Wi-Fi Module QFM-2202 Data Sheet: Technical Data Rev. 0 03/2015
10
Freescale Semiconductor, Inc.
Hardware Specification
Figure 7 6 Mbps OFDM
Figure 8 54 Mbps OFDM
Wi-Fi Module QFM-2202 Data Sheet: Technical Data Rev. 0 03/2015
Freescale Semiconductor, Inc.
11
Hardware Specification
Figure 9 MCS0 HT20
Figure 10 MCS7 HT20
Wi-Fi Module QFM-2202 Data Sheet: Technical Data Rev. 0 03/2015
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Freescale Semiconductor, Inc.
Layout Guide
Figure 11 MCS0 HT40
Figure 12 MCS7 HT40
4. Layout Guide
1. The antenna area should be towards outside of base board. The distance from pin1 or pin47 to
edge of base board should be smaller than 2mm.
Wi-Fi Module QFM-2202 Data Sheet: Technical Data Rev. 0 03/2015
Freescale Semiconductor, Inc.
13
Layout Guide
Figure 13 QFM-2202 distance for base board (unit: mm)
2. Red rectangle is the clearance area: on the base board, top and internal layers of the red rectangle
should have no shapes or clines; the bottom layer of the red rectangle should have a whole
ground shape.
Figure 14 QFM-2202 clearance area for base board (unit: mm)
Wi-Fi Module QFM-2202 Data Sheet: Technical Data Rev. 0 03/2015
14
Freescale Semiconductor, Inc.
Mechanical Interface Specification
5. Mechanical Interface Specification
QFM-2202 module dimensions are show as below.
Figure 15 QFM-2202 module dimensions top view
Figure 16 QFM-2202 module dimensions bottom view
Wi-Fi Module QFM-2202 Data Sheet: Technical Data Rev. 0 03/2015
Freescale Semiconductor, Inc.
15
Revision History
Figure 17 QFM-2202 module dimensions side view (unit: mm)
6. Ordering Information
Table 11 Ordering information
Part number
QFM-2202
QFM-2202-A
Temperature
-40 to 105 °C
-40 to 105 °C
MFi & HomeKit
Not Available
Available
7. Revision History
The following table provides a revision history for this document.
Table 12 Revision history
Revision number
Date
Substantive changes
0
03/2015
Initial Release
Wi-Fi Module QFM-2202 Data Sheet: Technical Data Rev. 0 03/2015
16
Freescale Semiconductor, Inc.
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Document Number: QFM2202DS
Rev. 0
03/2015