OLIMEX MOD-WiFi User manual

MOD-WiFi development board
User's manual
All boards produced by Olimex are ROHS compliant
Document revision B, May 2014
Copyri ht(c) 2014, OLIMEX Ltd, All ri hts reserved
Page 1

INTRODUCTION:
MOD-WiFi module gives you the opportunity to add WIFI to any o our
development boards with UEXT connector. There is ready made support in
Microchip's TCP-IP stack so you can use MOD-WIFI with any PIC board with UEXT
and you have hands on the complete source code.
BOARD FEATURES:
–MOD-WIFI extends OLIMEX boards (that have a UEXT connector) to have W reless
nternet access
–Uses M croch p MRF24WB0MA module
–Works w th M croch p TCP-IP stack
–PCB: FR-4, 1.5 mm (0,062"), soldermask, wh te s lkscreen component pr nt
–D mens ons: (29.00x22.50)mm (1.14x0.86)"
–Space between the p n rows: 20mm (0.8")
ELECTROSTATIC WARNING:
The MOD-WiFi board is shipped in protective anti-static packaging. The board
must not be subject to high electrostatic potentials. General practice or working
with static sensitive devices should be applied when working with this board.
BOARD USE REQUIREMENTS:
Hardware: some o our development boards with UEXT.
Page 2

Wi-Fi Module Features:
MOD-WiFi board use MRF24WB0MA Wi-Fi module with these eatures:
–Single-chip 802.11b including MAC, baseband, RF and power ampli ier
–Data Rate: 1 & 2 Mbps
–802.11b/g/n compatible
–Low power operation
–API or embedded markets, no OS required
–PCB antenna
–Hardware support or AES and RC4 based ciphers (WEP, WPA, WPA2 security)
–SPI slave inter ace with interrupt
–Single 3.3V supply, operates rom 2.7V to 3.6V
–21mm x 31mm 36-pin Dual Flat pack PCB SM Package
–Wi-Fi certi ied, RoHS and CE compliant
–FCC Certi ied (USA, FCC ID: W7O-ZG2100-ZG2101)
–IC Certi ied (IC: 8248A-G21ZEROG)
–Fully compliant with EU & meets the R&TTE Directive or Radio Spectrum
–Radio Type Approval Certi ied (Japan, MRF24WB0MA based solution ID:
AC164136-2 – 005WWCA0311 005GZCA0149)
Page 3

BLOCK DIAGRAM:
Page 4

SCHEMATIC:
Page 5
UEXT
MOD-WIFI, board revision A with MRF24WB MA
https://www.olimex.com
OLIMEX LTD, BULGARIA, 2 14
C1
1uF
C2
1uF
C3
39pF
R1
4.7k
R2
4.7k
R3
NA
R4 4.7k
R5
4.7k
R6
4.7k
R7
4.7k
R8
4.7k
R9
4.7k
CE_N
2
DNC 8
DNC1 22
DNC2 12
DNC3 13
DNC4 14
DNC5 15
GND 1
GND1 1
GND2 18
GND3 19
GND4 25
GND5 28
GND6 3
GND7 36
INT_NX
33
JTAG_EN
21
JTAG_RST_N
9
JTAG_TCK
4
JTAG_TDI
6
JTAG_TDO
3
JTAG_TMS
5
RES
16
RST_N
7
SCK
34
SCS_N
23
SDI
35
SDO
32
UART_RX
26
UART_TX
27
VDD1_1.8
11
VDD1_3.3
29
VDD2_1.8
24
VDD3_1.8
31
VDD_1.8
2
VDD_3.3
17
U1
MRF24WB MA
1 2
3 4
5 6
7 8
9 1
IDC1 F/PCB
3.3V
3.3V
3.3V3.3V3.3V
3.3V
3.3V
3.3V
#SS
#SS
INT_NX
INT_NX
JTAG_RST_N
JTAG_RST_N
MISO
MISO
MOSI
MOSI
RST_N
RST_N
RXD
RXD
SCK
SCK
TXD
TXD

BOARD LAYOUT:
POWER SUPPLY CIRCUIT:
MOD-WiFi is typically power supplied by UEXT pin 1 and pin 2 with 3.3V.
The board power consumption is about 110 mA.
RESET CIRCUIT:
MOD-WiFi reset circuit includes pull down R4 (4.7k) connected to MRF24WB0MA
pin 8 (JTAG_RST_N) and pin 21 (JTAG_EN).
JUMPER DESCRIPTION:
There are no jumpers on this board.
Page 6

CONNECTOR DESCRIPTIONS:
UEXT:
Pin # Signal Name
1 VCC
2 GND
3 RXD
4 TXD
5 INT_NX
6 RST_N
7 MISO
8 MOSI
9 SCK
10 #SS
Page 7

MECHANICAL DIMENSIONS:
UEXT measures
Page 8

AVAILABLE DEMO SOFTWARE:
–Microchip's application libraries l brar es that nclude a TCP-IP stack and examples,
very easy to con igure and use with PIC microcontrollers.
– PIC-WEB and MOD-WIFI demo example; based on MICROCHIP's application
libraries: https://www.olimex.com/Products/PIC/Development/PIC-
WEB/resources/PIC_WEB_MOD_WIFI_5_42.zip
– MOD-MX460 and MOD-WIFI demo example:
https://www.olimex.com/Products/Modules/Ethernet/MOD-
WIFI/resources/MOD-WIFI-demo- or-the-PIC32-MX460-rev.B-board.zip
– PIC-T795 and MOD-WIFI demo example:
https://www.olimex.com/Products/Duino/PIC32/PIC32-T795/resources/T795-
MOD-WIFI.zip
Page 9

ORDER CODE:
MOD-WiFi – completely assembled and tested
How to order?
You can order to us directly or by any o our distributors.
Check our web www.olimex.com or more in o.
Revision history:
Board revision: Rev. A – February 2010
Manual revision: Rev. Initial – June 2011
Rev. B – May 2014
Page 10