© 2011 Microchip Technology Inc.
Preliminary
DS70671A
MCW1001A
Data Sheet
TCP/IP Socket Communications
Interface with GPIO
DS70671A-page 2
Preliminary
© 2011 Microchip Technology Inc.
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EE
L
OQ
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32
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ISBN: 978-1-61341-681-5
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© 2011 Microchip Technology Inc.
Preliminary
DS70671A-page 3
MCW1001A
Key Features:
• Supports BSD like socket based connections
• Built-in Wi-Fi
®
connection management
messages
- Simplifies finding, connecting and
maintaining a Wi-Fi connection
• Easy-to-use messaging interface
• No external memory required
• Connects through Universal Asynchronous
Receiver/Transmitter (UART)
• Operates seamlessly with the MRF24WB0MA/MB
802.11 modules
• Easy integration into a final product
- Accelerates product development, provides
quicker time to market
• Designed for use with any microprocessor hosting
a UART port
• 8 general-purpose digital I/O
• Small size: 28 SSOP
Operational:
• Single operating voltage: 2.7V–3.6V(3.3V typical)
• Temperature range: -40°C to +85°C industrial
• UART interface, up to 230 Kbaud
• Low-current consumption:
- 10 mA operational current
Applications:
• Using MRF24WB0M module with standard UART
interface
• Using custom stacks with Microchip
microcontrollers
Markets:
• Utility and Smart Energy
- Thermostats
- Smart Meters
- White Goods
- HVAC
• Consumer Electronics
- Home security
• Industrial Controls
- Chemical sensors
- HVAC
- Security systems
- M2M communication
• Remote Device Management
- Automotive
- Code update
• Retail
- POS Terminals
• Medical, Fitness, and Health care
- Glucose meters
- Fitness equipment
- Patient asset tracking
TCP/IP Socket Communications Interface with GPIO
MCW1001A
DS70671A-page 4
Preliminary
© 2011 Microchip Technology Inc.
Pin Diagram
1
10
9
8
7
6
5
4
3
2
23
24
25
26
27
28
14
13
12
11
19
20
21
22
16
17
18
15
RESET
V
SS
V
DD
WINT
OSC2
OSC1
V
SS
NC
GPIO7
GPIO6
GPIO5
URTS
UCTS
WWP
GPIO4
VCAP
GPIO3
GPIO2
GPIO1
GPIO0
WSD0
UTX
URX
WSCK
WHIB
WRST
WCS
WSDI
MCW1001A
SSOP
© 2011 Microchip Technology Inc.
Preliminary
DS70671A-page 5
MCW1001A
Table of Contents
1.0
Device Overview .......................................................................................................................................................................... 7
2.0
External Connections ................................................................................................................................................................. 15
3.0
Universal Asynchronous Receiver (UART) ................................................................................................................................ 19
4.0
Network Configuration................................................................................................................................................................ 21
5.0
Transmitting And Receiving Packets.......................................................................................................................................... 23
6.0
Messaging API ........................................................................................................................................................................... 25
7.0
Electrical Characteristics ............................................................................................................................................................ 51
8.0
Packaging Information................................................................................................................................................................ 57
Appendix A: Revision history ............................................................................................................................................................... 61
The Microchip Web Site....................................................................................................................................................................... 63
Customer Change Notification Service ................................................................................................................................................ 63
Customer Support................................................................................................................................................................................ 63
Reader Response ................................................................................................................................................................................ 64
Product Identification System .............................................................................................................................................................. 65
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MCW1001A
DS70671A-page 6
Preliminary
© 2011 Microchip Technology Inc.
NOTES:
© 2011 Microchip Technology Inc.
Preliminary
DS70671A-page 7
MCW1001A
1.0
DEVICE OVERVIEW
The MCW1001A is a companion chip to the
MRF24WB0 802.11 module. It provides simple socket
based method of sending and receiving data from the
MRF24WB0 802.11 module. The MCW1001A has an
on-board TCP/IP stack and 802.11 connection
manager to simplify the connection between a wireless
network and the TCP/IP stack management. After the
initial configuration is set, the MCW1001A can access
the MRF24WB0 802.11 module to connect to a network
and send/receive serial data over a simple UART
interface.
Figure 1-1
illustrates a general block diagram of the
MCW1001A device.
Figure 1-2
illustrates application schematic.
Figure 1-3
illustrates application block diagram.
Table 1-1
lists the functions of the various pins shown
in the pin diagram.
Table 1-2
lists the UART API summary
FIGURE 1-1:
BLOCK DIAGRAM
UART
Controller
Baud
Generator
Control
Wi-Fi
TCP/IP Stack
MRF24WMB0
Driver
V
SS
Reset
Oscillator
Voltage
Regulator
GPIO1
UTX
URTS
URX
UCTS
GPI0 [0-7]
V
SS
V
DD
OSC2
OSC1
RESET
WWP
WCS
WSCK
WSDO
WSDI
WINT
WRST
WHIB
Manager
Connection
MCW1001A
DS70671A-page 8
Preliminary
© 2011 Microchip Technology Inc.
TABLE 1-1:
PINOUT DESCRIPTION
Pin
Number
Pin Name
Type
Description
1
RESET
I
Active-low Reset to the device.
2
GPIO0
I/O
General-purpose I/O
3
GPIO1
I/O
General-purpose I/O
4
GPIO2
I/O
General-purpose I/O
5
GPIO3
I/O
General-purpose I/O
6
VCAP
I
External filter capacitor connection for internal regulator
7
GPIO4
I/O
General-purpose I/O
8
V
SS
P
Ground
9
OSC1
I
Oscillator input
10
OSC2
O
Oscillator output
11
WCS
O
SPI Slave select output to MRF24WB0M
12
WRST
O
External Reset output control to MRF24WB0M
13
WHIB
O
HIBERNATE mode enable output to MRF24WB0M
14
WSCK
O
SPI clock output to MRF24WB0M
15
WSDI
I
SPI data input from MRF24WB0M
16
WSDO
O
SPI data output to MRF24WB0M
17
UTX
O
USART asynchronous transmit
18
URX
I
USART asynchronous receive
19
V
SS
P
Ground
20
V
DD
P
Power
21
WINT
I
External interrupt from MRF24WMB0
22
WWP
O
External write protect control to MRF24WB0M
23
UCTS
I
USART asynchronous clear to send (optional)
24
URTS
O
USART asynchronous request to send (optional)
25
GPIO5
I/O
General-purpose I/O
26
GPIO6
I/O
General-purpose I/O
27
GPIO7
I/O
General-purpose I/O
28
NC
NC
No Connect
Legend:
Pin type abbreviation: P = Power input I = Input
O = Output NC = No Connect
Note:
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 operation.
©
2011
Microchip Technology Inc.
Prelimina
ry
DS70671A-
page
9
MCW1001A
FIGURE 1-2:
EXAMPLE APPLICATION SCHEMATIC
© 2011 Microchip Technology Inc.
Preliminary
DS70671A-page 10
MCW1001A
FIGURE 1-3:
APPLICATION BLOCK DIAGRAM