User's Manual

WD112
User Manual
2016-02-05
5
3. Specification
Model Number
WD112
Product Type
802.11n hosted IoE module
Memory Sizes
Flash: 2MB External to MCU, 512KB internal to MCU
128KB SRAM internal to MCU.
Host Interface(s)
3xUSART, 2xSPI, 3xI
2
C
Embedded MAC Address
Yes
WiFi Chip(s)
Qualcomm Atheros QCA4002
MCU
STM32F411
Package
38-pin QFN
Wireless Standard(s)
IEEE 802.11b/g/n
Spreading
IEEE 802.11b DSSS and 802.11g/n OFDM
Operating Frequency
2412~2484MHz ISM band
Antenna
One PIFA antenna and one on-board printed antenna.
Number of Channels
11 (US), 13 (EU), 14 (Japan)
Data Rates
802.11n: up to 135Mbps
802.11g: 54Mbps with fallback to 48, 36, 24, 18, 12, 9 and
6Mbps
802.11b: 11Mbps with fallback to 5.5, 1 and 1Mbps
Modulation Schemes
802.11g/n:
64QAM (up to 135Mbps),
16QAM (39/36/26/24Mbps),
QPSK (19.5/18/13/12Mbps),
BPSK (9/6.5/6Mbps)
802.11b:
CCK (11/5.5Mbps), DQPSK (2Mbps), DBPSK (1Mbps)
Tx Power (typical)
Rx Sensitivity (typical)
-90dBm for 1Mbps @ 8% PER
-82dBm for 11Mbps @ 8% PER
-72dBm for 54Mbps @ 10% PER
-67dBm for HT40, MCS7 @ 10% PER
Media Access Protocol
CSMA/CA with ACK
Supply Power
3.14V to 3.46V
Printed Ant.: 23.75 dBm for 802.11b, 24.18 dBm for 802.11g, 23.71 dBm for 802.11n MCS0 (HT20),
17.62 dBm for 802.11n MCS0 (HT40). PIFA Ant.: 20.13 dBm for 802.11b, 23.46 dBm for 802.11g,
22.96 dBm for 802.11n MCS0 (HT20), 17.17 dBm for 802.11n MCS0 (HT40.