Ingics IWM438 User manual
User Manual Ver. 1
INGICS TECHNOLOGY
User Manual
Ver. 1
iWM438
Sep. 2017
Embedded WiFi/BLE Module
for M2M and IOT
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User Manual Ver. 1
Contents
Contents
Introduction
Features
Block Diagram
General Specification
General Specification
Voltage
Absolute Maximum Ratings
Recommended Operating Ratings
WiFi RF Specification
RF Specification
Power Consumption
BLE RF Specification
Pin Assignments
PCB Pin Outline
Pin Description
Dimensions
Physical Dimensions
Layout Recommendation
PCB Antenna Pattern and Gain
Revision History
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Introduction
iWM438 is a low-power consumption module which has Wi-Fi 802.11b/g/n
functionalities. The highly integrated iWM438 module makes the possibilities of web
browsing, all types of battery powered device. With seamless roaming capabilities and
advanced security, iWM438 can also interact with different vendors’ 802.11b/g/n Access
Points in the wireless LAN.
The wireless module complies with IEEE 802.11 b/g/n standard and it can achieve up
to a speed of 72.2Mbps with single stream in 802.11n draft 7.0, 54Mbps as specified in
IEEE 802.11g, or 11Mbps for IEEE 802.11b to connect to the wireless LAN.
This compact module is a total solution for a combination of Wi-Fi 802.11b/g/n
technologies with Microcontroller Processor. The module is specifically developed for
embedded system devices.
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Features
■ Single-band 2.4GHz IEEE 802.11b/g/n
■ Integrated ARM Cortex-M4TM CPU with on-chip memory enables running IEEE802.11
firmware that can be field-upgraded with future features.
● CPU clock up to 100MHz.
● 2MB on-board SPI flash.
● 1MB on-chip flash.
● 256KB internal SRAM.
■ Low power sleep/stop/standby modes support.
■ Peripherals
● Up to 25 GPIOs.
● Serial wire debug(SWD) debug interface.
● UART flow control, SPI, Quad-SPI, I2C.
■ Full SDK for customer application development.
■ On-board PCB antenna, U.F.L connector, also pad#41 for external antenna(optional).
■ Lead-Free / RoHS
■ Single power supply voltage 3.3V.
■ Security:
● Hardware WAPI acceleration engine
● AES and TKIP in hardware for faster data encryption and IEEE 802.11i
compatibility
● WPATM – and WPA2TM - (Personal) support for powerful encryption and
authentication
Block Diagram
A simplified block diagram of the module is depicted in the figure below.
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General Specification
General Specification
Model Name
iWM438
Product Description
Wi-Fi 802.11b/g/n + BLE 4.1 + MCU Module
Dimension
16 mm x 32 mm x 3.1mm ±0.5mm
MCU main flash
memory
1MB
External flash
2MB
Module Interface
SPI/UART/I2C/SWD
Ambient temperature
-20°C to 70°C
Storage temperature
-40°C to 85°C
Humidity
Operating Humidity 10% to 95%
Non-Condensing
Storage Humidity 5% to 95% Non-Condensing
Voltage
Absolute Maximum Ratings
Symbol
Description
Min.
Max.
Unit
VDD_3V3
Power supply for SIP
Module
-0.4
3.7
V
Recommended Operating Ratings
Symbol
Min.
Typ.
Max.
Unit
VDD_3V3
3.0
3.3
3.6
V
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WiFi RF Specification
RF Specification
Conditions : VDD=3.3V ; Temp:25°C
Feature
Description
WLAN Standard
IEEE 802.11b/g/n, WiFi compliant
Frequency Range
2.400 GHz ~ 2.484 GHz (2.4 GHz ISM Band)
Number of Channels
2.4GHz：Ch1 ~ Ch13
Modulation
802.11b : CCK, DQPSK, DBPSK
802.11 g/n : OFDM /64-QAM,16-QAM, QPSK, BPSK
Output Power
802.11b /11Mbps : 15 dBm ± 2 dB , typical @ EVM ≤ -9dB
802.11g /54Mbps : 13 dBm ± 2 dB , typical @ EVM ≤ -25dB
802.11n /65Mbps : 12 dBm ± 2 dB , typical @ EVM ≤ -28dB
Receive Sensitivity
(11n,20MHz)
@10% PER
- MCS=0 PER @ -85dBm, typical
- MCS=1 PER @ -84dBm, typical
- MCS=2 PER @ -82dBm, typical
- MCS=3 PER @ -80dBm, typical
- MCS=4 PER @ -77dBm, typical
- MCS=5 PER @ -73dBm, typical
- MCS=6 PER @ -71dBm, typical
- MCS=7 PER @ -69dBm, typical
Receive Sensitivity
(11g) @10% PER
- 6Mbps PER @ -86dBm, typical
- 9Mbps PER @ -85dBm, typical
- 12Mbps PER @ -85dBm, typical
- 18Mbps PER @ -83dBm, typical
- 24Mbps PER @ -81dBm, typical
- 36Mbps PER @ -78dBm, typical
- 48Mbps PER @ -73dBm, typical
- 54Mbps PER @ -72dBm, typical
Receive Sensitivity
(11b) @8% PER
- 1Mbps PER @ -90dBm, typical
- 2Mbps PER @ -89dBm, typical
- 5.5Mbps PER @ -88dBm, typical
- 11Mbps PER @ -85dBm, typical
Data Rate
802.11b : 1, 2, 5.5, 11Mbps
802.11g : 6, 9, 12, 18, 24, 36, 48, 54Mbps
Data Rate
(20MHz,Long
GI,800ns)
802.11n: 6.5, 13, 19.5, 26, 39, 52, 58.5, 65Mbps
Data Rate
(20MHz ,short
GI,400ns)
802.11n: 7.2, 14.4, 21.7, 28.9, 43.3, 57.8, 65,72.2Mbps
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Maximum Input Level
802.11b : -10 dBm
802.11g/n : -20 dBm
Antenna Reference
On board ANT :Small antennas with 0~2 dBi peak gain
Option :One U.F.L connector for external antenna
Option :ANT output pin
Power Consumption
Conditions: VDD=3.3V ; Temp:25°C
Mode
Description
Min.
Typ.
Max.
Unit
802.11B
TX 11Mbps @ 15 dBm
310
mA
RX 11Mbps @ -85dBm
Payload length 1000Bytes
60
mA
802.11G
TX 54Mbps @ 13 dBm
250
mA
RX 54Mbps @ -72dBm
Payload length 1000Bytes
60
mA
802.11N
TX 65Mbps @ 12 dBm
250
mA
RX 65Mbps @ -69dBm
Payload length 1000Bytes
60
mA
Low power consumption
Mode
Typ.
MCU(SLEEP), WIFI(idle)
9.5mA
MCU(STOP),DTIM 1
3.4mA
MCU(STOP),DTIM 3
3mA
MCU(STOP), WIFI(off)
1.1mA
MCU(STANDBY), WIFI(off)
120uA
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BLE RF Specification
RF
Specification
Min.
Typical.
Max.
Output Power
8dBm
Sensitivity @
BER=0.1%
for GFSK (1Mbps)
-88 dBm
-70 dBm
Modulation Char:
delta f1 average
225kHz
255kHz
275kHz
Modulation Char:
delta f2 max.
185kHz
Modulation Char:
ratio
0.8
0.95
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Pin Assignments
PCB Pin Outline
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Pin Description
This is original define. More alternative function mapping refers to STM32F412X
datasheet.Warning: For all the NC pins, please keep it floating and do not connect to
ground.
No
Name
Type
Description
1
BOOT0
-
Boot configuration option
(default: Floating, DO NOT connect)
2
PC6
I/O
GPIO PIN
3
PC0
I/O
GPIO PIN
4
SPI2_MOSI/PC3
I/O
SPI_MOSI
5
SPI2_NSS/PB12
I/O
SPI_NSS
6
SPI2_SCK/PC7
I/O
SPI_SCK
7
SPI2_MISO/PC2
I/O
SPI_MISO
8
USART2_TX/PA2
I/O
Debug_UART_TX
9
QSPI_BK1_IO3/PA1
I/O
QSPI_IO3
10
VBAT
I
MCU operating voltage input (power
supply for RTC,
external clock, 32 kHz oscillator and
backup registers
(through power switch) when VDD is
not present.)
11
LPO
I
External low power clock input
(32.768KHz)
(default: internal low power clock)
12
USART2_RX/PA3
I/O
Debug_UART_RX
13
MICRO_RST_N
I/O
MCU Reset
14
WAKE_UP/PA0
I/O
External Wake up
15
NC
I
No function
(default:
Floating,
DO
NOT
connect)
16
NC
I
No function
(default:
Floating,
DO
NOT
connect)
17
I2C1_SCL/PB8
I/O
I2C_SCL
18
I2C2_SDA/PB9
I/O
I2C_SDA
19
PB7
I/O
GPIO PIN
20
GND
－
Ground
21
GND
－
Ground
22
NC
-
No function
(default:
Floating,
DO
NOT
connect)
23
NC
-
No function
(default:
Floating,
DO
NOT
connect)
24
PA10
I/O
GPIO PIN
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25
SWD_TCK/PA14
I/O
SWD_TCK
26
SWD_TMS/PA13
I/O
SWD_TMS
27
UART1_RTS /PA12
I/O
UART_RTS
28
QSPI_BK1_IO1/PC10
I/O
QSPI_IO1
29
UART1_RX /PB3
I/O
UART_RX
30
UART1_TX /PA15
I/O
UART_TX
31
QSPI_CLK/PB2
I/O
QSPI_CLK
32
QSPI_BK1_NCS/PB6
I/O
QSPI_NCS
33
QSPI_BK1_IO2/PC8
I/O
QSPI_IO2
34
QSPI_BK1_IO0/PC9
I/O
QSPI_IO0
35
UART1_CTS /PA11
I/O
UART_CTS
36
PB1
I/O
GPIO PIN
37
PB0
I/O
GPIO PIN
38
PB15
I/O
GPIO PIN
39
VDD_3V3
V
Power supply input
40
VDD_3V3
V
Power supply input
41
ANT
O
RF OUTPUT(option)
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Dimensions
Physical Dimensions
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Layout Recommendation
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PCB Antenna Pattern and Gain
Certification
This module is approved by FCC with ID: 2AH2IIWM438. To use this module, please put an exterior
label with wording “ Contains FCC ID: 2AH2IIWM438” on your product.
Statement
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.
Federal Communication Commission Interference 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 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.
FCC
Caution
: To assure continued compliance, any changes or modifications not expressly approved by
the party responsible for compliance could void the user's authority to operate this equipment. (Example -
use only shielded interface cables when connecting to computer or peripheral devices).
FCC
Radiation
Exposure
Statement
This equipment complies with FCC RF radiation exposure limits
set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum
distance of 20 centimeters between the radiator and your body.
This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
The antennas used for this transmitter must be installed to provide a separation distance of at least 20 cm
from all persons and must not be co-located or operating in conjunction with any other antenna or
transmitter.
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User Manual Ver. 1
Revision History
Date
Revision
Changes
Sep. 2017
1
Initial release
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