CHINA DRAGON TECHNOLOGY CDW4982660 CDW.4982660-00 User Manual
CHINA DRAGON TECHNOLOGY LIMITED CDW.4982660-00
User Manual
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MODEL: CDW-4982660-00
1. Introduction
Espressif Systems’ Smart Connectivity Platform (ESCP) of high performance wireless SOCs, for
mobile platform designers, provides unsurpassed ability to embed Wi-Fi capabilities within other
systems,at the lowest cost with the greatest functionality.
2. General Descriptions
The CDW-4982660-00 offers a complete and self-contained Wi-Fi networking solution, allowing it to
either host the application or to offload all Wi-Fi networking functions from another application processor.
When The CDW-4982660-00 hosts the application, and when it is the only application processor in the
device, it is able to boot up directly from an external flash. It has integrated cache to improve the
performance of the system in such applications, and to minimize the memory requirements.
Alternately, serving as a Wi-Fi adapter, wireless internet access can be added to any
microcontroller-based design with simple connectivity through UART interface or the CPU AHB
bridge interface.
The CDW-4982660-00 on-board processing and storage capabilities allow it to be integrated with the
sensors and other application specific devices through its GPIOs with minimal development up-front and
minimal loading during runtime. With its high degree of on-chip integration, which includes the antenna
switch balun, power management converters, it requires minimal external circuitry, and the entire solution,
including front-end module, is designed to occupy minimal PCB area.
Sophisticated system-level features include fast sleep/wake context switching for energy- efficient VoIP,
adaptive radio biasing for low-power operation, advance signal processing, and spur cancellation and
radio co-existence features for common cellular, Bluetooth, DDR, LVDS, LCD interference mitigation.
3. Features
•
802.11 b/g/n protocol
•
Wi-Fi Direct (P2P), soft-AP
•
Integrated TCP/IP protocol stack
•
Integrated TR switch, balun, LNA, power amplifier and matching network
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MODEL: CDW-4982660-00
•
Integrated PLL, regulators, and power management units
•
+18dBm output power i n 802.11b mode
•
Integrated t emperature sensor
•
Supports a ntenna diversity
•
Power down leakage current of < 10uA
•
Integrated low power 32-bit CPU could be used as application processor
•
SDIO 2.0, SPI, UART
•
STBC, 1×1 MIMO, 2×1 MIMO
•
A-MPDU & A-MSDU aggregation & 0.4µs guard interval
•
Wake up and transmit packets in < 2ms
•
Standby power consumption of < 1.0mW (DTIM3)
4. Applications
•
Smart power plugs
•
Home automation
•
Mesh network
•
Industrial wireless control
•
Baby monitors
•
IP Cameras
•
Sensor networks
•
Wearable electronics
•
Wi-Fi location-aware devices
•
Security ID tags
•
Wi-Fi position system beacons
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MODEL: CDW-4982660-00
5. Block Diagram
6. General Specification
Category
P
ar
ameter
V
alue
Wi-Fi
Standard 802.11 b/g/n
F
requenc
y 2412-2462MHz
Tx Power
802.11 b： 18dBm
802.11 g ：14dBm
802.11 n ：14dBm
Rx Sensitivity
802.11 b ：(11Mbps) -86dbm
802.11 g ：(54Mbps) -72dbm
802.11 n ： (MCS7) -69dbm
Antenna
PCB Trace
External I-PEX Connector
Hardware
Data Interface UART/I2C/ GPIO/PWM/SPI
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MODEL: CDW-4982660-00
Operating
Voltage 3.0~3.6V
Peak
Current
Max.600mA
Operatin
g
-20 ℃
-
70 ℃
Storage -40 ℃
-
85 ℃
Size 18.6x13x2.2mm
External Interface N/A
Software
Wi-Fi
Mode
station/softAP/SoftAP+station
Security WPA/WPA2
Encryption WEP/TKIP/AES
Firmware Upgrade
UART Flash
Download
Via Cloud Server
SW
Development
Supports Cloud Server
Development
I
SDK for
custom
Network
Protocols IPv4，TCP/UDP/HTTP/FTP
User Config AT
Instruction
Set(loud Server
Android/ios App
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MODEL: CDW-4982660-00
7. Current Consumption
M
od
e
M
i
n
T
y
p
Ma
x
U
n
i
t
Transmit 802.11b, CCK 11Mbps, POUT=+17dBm 175
mA
Transmit 802.11g, OFDM 54Mbps, POUT =+15dBm 145
mA
Transmit 802.11n, MCS7, POUT=+13dBm 125
mA
Receive 802.11b, packet length=1024 byte, -80dBm
55
mA
Receive 802.11g, packet length=1024 byte, -70dBm
56
mA
Receive 802.11n, packet length=1024 byte, -65dBm
56
mA
Modem-Sleep
15
mA
Light-Sleep
0.9
mA
Deep-Sleep
10
uA
Off 5
uA
1. Modem-Sleep requires the CPU to be working, as in PWM or I2S applications. According to
802.11 standards (like U-APSD), it saves power to shut down the Wi-Fi Modem circuit while
maintaining a Wi-Fi connection with no data transmission. E.g. in DTIM3, to maintain a sleep
300ms-wake 3ms cycle to receive AP’s Beacon packages, the current is about 15mA
2. During Light-Sleep, the CPU may be suspended in applications like Wi-Fi switch. Without data
transmission, the Wi-Fi Modem circuit can be turned off and CPU suspended to save power according to
the 802.11 standard (U-APSD). E.g. in DTIM3, to maintain a sleep 300ms-wake 3ms cycle to receive
AP’s Beacon packages, the current is about 0.9mA
3. Deep-Sleep does not require Wi-Fi connection to be maintained. For application with long time lags
between data transmission, e.g. a temperature sensor that checks the temperature every 100s, sleep 300s
and waking up to connect to the AP (taking about 0.3~1s), the overall average current is less than 1mA.
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MODEL: CDW-4982660-00
8. Dimension & Pin Assignments
mm
3.3V
GPIO4
GPIO0
GPIO2
GPIO15
GND
GND
GPIO14
GPIO12
GPIO16
CH_EN
TOUT
RST
TXD
GND
RXD
GPIO5
GPIO13
18.60
15.00
7.45
3.10
3.70 3.70
0.90
0.55
1.10
1.52
7.90
NO Na Descri
p
tion
1
3.3V Power su
pp
l
y
,
3.3V is re
q
uired
2 GPIO4 GPIO4
3 GPIO0 GPIO0 , SPI_CS2
4 GPIO2 GPIO2 , I2C_SDA
5 GPIO15 GPIO15 , HSPI_CS
6 GND Ground connections
7 GPIO13 GPIO13 , HSPI_D
8 GPIO5 GPIO5
9 RXD UART_RX , GPIO3
10 GND Ground connections
11 TXD UART_TX , GPIO1 , SPI_CS1
12 RST External reset, active low
13 TOUT 10 bit ADC
14 CHIP_EN Chip enable, Active h
15 GPIO16 Deep-Sleep Wake , GPIO16
16 GPIO12 GPIO12 , HSPI_Q
17 GPIO14 GPIO14 , I2C_SCL , HSPI_CLK
18 GND Ground connections
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MODEL: CDW-4982660-00
9. Optimal PCB placement of the module
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MODEL: CDW-4982660-00
10. Recommended Reflow Profile
Referred to IPC/JEDEC standard.
Peak Temperature : <250°C
Number of Times : 2 times
ESD
CAUTION
The CDW-4982660-00 is ESD (electrostatic discharge) sensitive device and may be damaged with
ESD or spike voltage. Although CDW-4982660-00 is with built-in ESD protection circuitry, please
handle with care to avoid the permanent malfunction or the performance degradation.
FCC Caution: Any changes or modifications not expressly
approved by the party responsible for compliance could void the user's
authority to operate this equipment.
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.
This device and its antenna(s) must not be co-located or operating in conjunction
with any other antenna or transmitter.
15.105 Information to the user.
(b) For a Class B digital device or peripheral, the instructions furnished the
user shall include the following or similar statement, placed in a prominent
location in the text of the manual:
Note: 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.
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This
equipment should be installed and operated with minimum distance 20cm between the radiator and your bo
dy.
Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.
This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
The module should not be installed and operated simultaneously with other radios except additional RF
exposure was evaluated for simultaneously transmission.
The availability of some specific channels and/or operational frequency bands are country dependent and
are firmware programmed at the factory to match the intended destination.
The firmware setting is not accessible by the end user.
The final end product must be labelled in a visible area with the following:
“Contains Transmitter Module ROW-CDW4982660”