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WizFi250 Datasheet

Datasheet History

Version Date Description
V1.0.0 2013-11-28 Official Release
V1.0.1 2014-4-2 Fixed some mistyping
Add JTAG_TCK (Pin Number 54)
Introduction

WizFi250 is a small size wireless module for the highest level of integration, featuring 802.11b/g and 802.11n.
It includes a 2.4 GHz WLAN CMOS power amplifier (PA) that meets the output power requirements of most handheld systems.
Along with the integrated power amplifier, the WizFi250 also includes integrated transmit and receive baluns, further reducing the overall solution cost.
The small size and low profile physical design eases enabling high performance wireless connectivity without space constraint in system designs.
Hardware WAPI acceleration engine, AES, TKIP, WPA and WPA2 are supported to provide your network with the latest security requirements.
For software and driver development, WIZnet provides extensive technical documents and reference software codes for system integration.

2013/08/28 09:43 · ssekim
Features
  • Single band 2.4GHz IEEE 802.11b/g/n
  • Integrated RF power amplifier
  • Supports wireless data rates up to 65Mbit/s
  • 1MB Flash Memory, 128KB SRAM, 1MB Serial Flash
  • Supports per packet Rx Antenna diversity
  • Low power consumption & excellent power management performance to extend battery life.
  • Small size, suitable for low volume system integration.
  • Easy integration into mobile and handheld devices flexible system configuration.
  • 2.412-2.484 GHz two SKUs for worldwide market.
  • Lead Free design supporting Green design requirements, RoHS Compliance.
  • Device Package : 28×20 mm (17×20 mm)
  • Serial Interface : UART, SPI
  • Powerful Web server provides
  • Soft AP
    • Sufficient memory retention
    • Wi-Fi Security (WEP, WPA/WPA2PSK)
    • L2 Switching
  • OTA(Over The Air F/W Upgrading)
2013/08/28 09:42 · ssekim
Block diagram

The WizFi250 module is designed based on WiFi block and MCU block . It supports generic SPI, UART interface to connect WLAN to the host processor. A simplified block diagram of the WizFi250 module is depicted in the Fig. below.

2013/08/28 09:47 · ssekim
Pin description
Pin map


Pin description
Pin Number Pin Define Type Description
1 GND - Groud
2 VBAT_WL I Battery supply input
3 VBAT_WL I Battery supply input
4 GND - Ground
5 VDDIO_3V3_WL I Digital I/O supply.
6 GND - Ground
7 NC -
8 NC -
9 NC -
10 NC -
11 NC -
12 NC -
13 GND - Ground
14 NC -
15 GND - Ground
16 NC -
17 NC -
18 NC -
19 NC -
20 NC -
21 SPI_MISO I/O SPI Master In Slave Out
22 SPI_SCK I/O SPI Clock
23 SPI_MOSI I/O SPI Master Out Slave In
24 SPI_SS I/O SPI Slave Select
25 GND - Ground
26 VDD_3V3 I Power supply for I/O and the internal regulator
27 VDD_3V3 I Power supply for I/O and the internal regulator
28 GND - Ground
29 UART2_RTS I/O Active-low request-to-send signal for UART2 interface (Not Used)
30 UART2_CTS I/O Active-low clear-to-send signal for UART2 interface (Not Used)
31 UART2_RXD I Serial data input for UART2 interface (Not Used)
32 UART2_TXD O Serial data output for UART2 interface (Not Used)
33 NC -
34 RESET I RESET pin (Active Low)
35 NC -
36 NC -
37 GND - Ground
38 VBAT I Power supply when VDD_3V3 is not present.
39 GND - Ground
40 GPIO1 I/O GPIO1 pin
41 BOOT I BOOT MODE pin (Active low)
42 FUNCTION I FUNCTION pin (Active Low)
43 GPIO5 I/O GPIO5 pin
44 GPIO6 I/O GPIO6 pin
45 GPIO7 I/O GPIO7 pin
46 GPIO8 I/O GPIO8 pin
47 GPIO9 I/O GPIO9 pin
48 Wi-Fi_STATUS I/O Wi-Fi Status pin
49 MODE_STATUS I/O MODE Status pin
50 SPI_Data_Ready(GPIO14) I/O In SPI Mode, It is used to SPI_Data Ready Pin
51 JTAG_TRST I For normal operation, if JTAG is not used, this pin can be left unconnected (NC)
52 JTAG_TDO I/O For normal operation, if JTAG is not used, this pin can be left unconnected (NC)
53 JTAG_TDI I/O For normal operation, if JTAG is not used, this pin can be left unconnected (NC)
54 JTAG_TMS I For normal operation, if JTAG is not used, this pin can be left unconnected (NC)
55 JTAG_TCK I For normal operation, if JTAG is not used, this pin can be left unconnected (NC)
56 GND - Ground
57 GND - Ground
58 GND - Ground
59 GND - Ground
60 NC -
61 UART1_RTS I/O Active-low request-to-send signal for UART1 interface (Use)
62 UART1_CTS I/O Active-low clear-to-send signal for UART1 interface (Use)
63 UART1_RXD I Serial data input for UART1 interface (Use)
64 UART1_TXD O Serial data output for UART1 interface (Use)
65~73 GND - Ground
2013/08/28 10:41 · ssekim
Technical specification
Absolute maximum rating
Supply Power Max +3.6 Volt
Storage Temperature - 40° to 85° Celsius
Voltage ripple +/- 2% Max Values not exceeding Operating voltage
Recommendable operation condition
Temperature, humidity

The WizFi250 can withstand the operational requirements as listed in the table below.

Operating Temperature -20° to 85° Celsius
Humidity range Max 95%, Non condensing, relative humidity

* The maximum operating ambient temperature can be up to 85°. Exposure to absolute-maximum-rated conditions may cause performance degradation and affect device reliability. For the best performance -20° to 75° is recommended.

Voltage

Power supply for the WizFi250 module will be provided by the host via power pins.

Symbol Parameter Min Typ. Max Unit
VBAT_WL power supply for WizFi250 3.0 3.3 3.6 V
VDDIO_3V3_WL host Interface power supply 3.0 3.3 3.6 V
VBAT_MICRO backup operating voltage 3.0 3.3 3.6 V
VDD_3V3 power supply for MCU 3.0 3.3 3.6 V
Current consumption

The WizFi250 on operation output current consumption :

MCU mode WiFi mode
(802.11n)
Typ.
(RMS)
Max.
Normal mode Not Associated 14 mA 18 mA
Normal mode Associated 67 mA 69 mA
Normal mode Associated
(IEEE Power Save mode)
32 mA 65 mA
Stop mode Associated
(IEEE Power Save mode)
14 mA 17 mA
Stop mode Not Associated 3 mA 23 mA

The WizFi250 on TX mode output current consumption :
(Typical spec is defined @3.3V 25℃ ; MAX. spec is defined @3.0V 70℃)

Current Consumption Typ. Max.
Tx output power @16.5 dBm on 11b 1M 385 mA 430 mA
Tx output power @ 16.5 dBm on 11b 11M 370 mA 410 mA
Tx output power @ 15 dBm on 11g 6M 345 mA 380 mA
Tx output power @ 13 dBm on 11g 54M 290 mA 320 mA
Tx output power @ 14.5 dBm on 11n MCS0 315 mA 350 mA
Tx output power @ 12 dBm on 11n MCS7 265 mA 295 mA

The WizFi250 on RX mode current consumption :
(Typical spec is defined @3.3V 25℃; MAX. spec is defined @3.0V 70℃)

Current Consumption Typ. Max.
Rx @ 11b 1M 120 mA 150 mA
Rx @ 11b 11M 120 mA 150 mA
Rx @ 11g 6M 120 mA 150 mA
Rx @ 11g 54M 120 mA 150 mA
Rx @ 11n MCS0 120 mA 150 mA
Rx @ 11n MCS7 120 mA 150 mA
Wireless specifications

WizFi250 complies with following features and standards;

Features Description
WLAN Standards IEEE 802 11 b/g/n
Antenna Connecter Port One printed antenna, one U.FL connector for external antenna
Frequency Band 2.400 GHz ~ 2.484 GHz
Number of Sub Channels CH1 to CH14
Modulation DSSS, CCK, OFDM, BPSK, QPSK,16QAM, 64QAM
Supported data rates 11b 1, 2, 5.5, 11 (Mbps)
11g 6, 9, 12, 18, 24, 36, 48, 54 (Mbps)
11n HT20 MCS0(6.5Mbps) to HT20 MCS7(65Mbps)
Specifications of WiFi’s output power, evm, sensitivity

The WizFi250 WiFi output power is listed in the table below:

Characteristics Typ. Criteria Unit
RF Average Output Power, 802.11b CCK Mode 1M 16.5 +/- 1.5 dBm
11M 16.5 +/- 1.5 dBm
RF Average Output Power, 802.11g OFDM Mode 6M 15 +/- 1.5 dBm
54M 13 +/- 1.5 dBm
RF Average Output Power, 802.11n OFDM Mode MCS0 14.5 +/- 1.5 dBm
MCS7 12 +/- 1.5 dBm

WiFi TX EVM following the IEEE spec as listed in the table below:

Characteristics IEEE Spec Unit
RF Average Output EVM (11b) @1 Mbps -10 dB
@11 Mbps -10 dB
RF Average Output EVM (11g) @6 Mbps -5 dB
@54 Mbps -25 dB
RF Average Output EVM (11n) @ MCS0 -5 dB
@ MCS7 -28 dB

The WizFi250 Wi-Fi sensitivity as listed in the table below:

Receiver Characteristics Typ. Max. Unit
PER <8%, Rx Sensitivity @ 1 Mbps -96 -89 dBm
PER <8%, Rx Sensitivity @ 11 Mbps -88 -84 dBm
PER <10%, Rx Sensitivity @ 6 Mbps -90 -83 dBm
PER <10%, Rx Sensitivity @ 54 Mbps -74 -70 dBm
PER <10%, Rx Sensitivity @ MCS0 -89 -83 dBm
PER <10%, Rx Sensitivity @ MCS7 -71 -67 dBm
2013/08/28 10:44 · ssekim
I/O port characteristics

WizfFi250 is a small size wireless module. Unless otherwise specified, parameters are given as in the table below.

Symbol Parameter Conditions Min Typ Max Unit
VIL Standard IO input low level voltage -0.3 0.28*(VDD-2V)+0.8V V
IO FT(1) input low level voltage -0.3 0.32*(VDD-2V)+0.75V V
VIH Standard IO input high level voltage 0.41*(VDD-2V)+1.3V VDD+0.3 V
IO FT(1) input high level voltage VDD > 2V 0.42*(VDD-2V)+1V 5.5 V
VDD≤ 2V 5.2
Vhys Standard IO Schmitt trigger voltage hysteresis(2) 200 mV
IOFT Schmitt trigger voltage hysteresis(2) 5%VDD(3) mV
Ilkg Input leakage current(4) VSS≤VIN≤VDD
Standard I/Os
±1 μA
VIN=5V,I/O FT 3
RPU Weak pull-up equivalent resistor(5) VIN=VSS 30 40 50 k Ω
RPD Weak pull-down equivalent resistor(5) VIN=VDD 30 40 50 k Ω
CIO I/O pin capacitance 5 pF

1. FT = Five-volt tolerant. In order to sustain a voltage higher than VDD+0.3 the internal pull-up/pull-down resistors must be disabled.
2. Hysteresis voltage between Schmitt trigger switching levels. Based on characterization, not tested in production.
3. With a minimum of 100 mV.
4. Leakage could be higher than max. if negative current is injected on adjacent pins.
5. Pull-up and pull-down resistors are designed with a true resistance in series with a switchable PMOS/NMOS. The MOS/NMOS contribution to the series resistance is minimum(~10% order).

2013/08/28 13:30 · ssekim
Dimensions, weight and mounting

The following paragraphs provide the requirements for size, weight and mounting of the WizFi250.

Dimensions

28 mm (W) x 20 mm (L) x 1.9 mm (H) (+/- 0.1mm) (PCB Antenna, Including metal shielding)
17 mm (W) x 20 mm (L) x 1.9 mm (H) (+/- 0.1mm)


Pin out and pin description


Recommend footprint


2013/08/28 13:45 · ssekim
Design Guide
PCB Antenna Guide
Module Location Recommendation

To get better antenna performance, the following two module locations are advised.


-Location 1: Module is recommended to be on the upper right corner of main board.


-Location 2: Module is recommended to be on the upper left corner of main board.


Module Layout Guideline

- Main board antenna area under module printed antenna should be clear or empty.
- No signals, GND or power traces can be routed in antenna area for each layers of the main board.
- Any mental lids, power traces or metal components should be placed far away from the antenna area on the main board.
- Keep GND plane as large as you can on main board.



Antenna Simulation Result
Ant. on right-up corner Ant. on left-up corner
Configuration
S11
Gain
3D Pattern



Antenna Measurement Setup


Module is on the upper right corner of main board for performance measurement.

Antenna measurement setup as the figure.


Antenna Measurement Results





Firmware Update - Circuit Guide

WizFi250 provides some specific functions according to its firmware. Until now, there is a standard firmware and some customized firmware to specific customers available. It is possible to perform firmware updates.

WizFi250 decides its operating mode according to the input value of the BOOT signal. WizFi250 operates in boot mode when the BOOT input value is “LOW”, otherwise it operates in the standard run mode. WizFi250 communicates with a PC via UART in order to upload another firmware, so you have to connect UART1_RXD and UART1_TXD to the external interface for communicating with PC.
Two different schematics for that connection are listed below.

Case 1

A simple circuit for updating firmware.
If your application MCU has UART communication with WizFi250, there is a possibility that the firmware update with an external PC will fail because of dual use of the one UART interface. In that case WIZnet cannot guarantee a completely successful update.
Therefore, please monitor the signal of BOOT with your MCU by a GPIO. Please stop the UART communication between your MCU and the WizFi250 when the BOOT input value is “LOW”. After that detection of a “LOW” BOOT signal you can succeed firmware update.



Case 2

This circuit selects the UART communication using some extra hardware. If the BOOT SW is ON(GND), it is in BOOT Mode, and if the BOOT SW is OFF(3.3V) it is RUN Mode. The UART signal of the WizFi250 is connected to the firmware update UART (PC) when it becomes BOOT Mode, so firmware updates are made possible. The UART signal of the WizFi250 is only connected on your MCU if the BOOT signal is “High” and WizFi250 goes into the RUN Mode.






2013/11/28 17:11 · jeongsk
Recommend reflow profile

The following paragraphs provide the requirements for the size, weight and mounting of the WizFi250.
A-B. Temp.: 150~200℃; soak time:60~120sec.
C. Peak temp: 235~245℃.
D. Time above 220 ℃: 40~90sec.
Suggestion: Optimal cooling rate is <1℃/sec. from peak to 220 ℃.

2013/08/28 14:32 · ssekim
WizFi250 Ref. Schematic
2013/10/04 15:54 · jeongsk
Instruction to OEM


This device complies with Industry Canada’s licence-exempt RSSs. Operation is subject to the following two conditions:

(1) This device may not cause interference; and
(2) This device must accept any interference, including interference that may cause undesired operation of the device.

This application and its antenna must not be co-located or operation in conjunction with any other antenna or transmitter. A minimum separation distance of 20cm must be maintained between the antenna and the person for this appliance to satisfy the RF exposure requirements.

Host labeling requirement: “Contains transmitter module IC: 20560-WIZFI250”


2015/09/17 19:00 · jehoon song
products/wizfi250/wizfi250ds/start.txt · Last modified: 2015/09/17 19:00 by daniel