SAMW25-MR210/510PA Hardware Design
Contents
1. Yes Yes Yes Yes Pull up Currently used only for Atmel de 49 Wi Fi l2C_SDA ATWINC1500 I O bug Not for customer use Leave unconnected Yes Pull up Currently used only for Atmel de 50 Wi Fi Reset_n ATWINC1500 Input bug Not for customer use Leave unconnected O1 Atmel 42436A SAMW25 MR210510PA HW Design Guide IEEE802 1 1bgn loT Module_UserGuide_032015 2 2 Module Outline Drawing Figure 2 2 Module Drawings Top and Bottom Views unit mils SHIELD m SIDE VIEW TOP VIEW 333 89 0 D t D0DDDDDDDDDDDDDDDDDI 14 SQUARE Pt E e 74 SQ 47 25 PITCH EU Pos o oN 35 3 GNDIGNO e 2 34 9 o Di Sch CO z d oO 29 212 99 P51 om 00000000000000 000 00 0 10 em 9 69 70 2 EI PADS FOOTPRINT TOP VIEW 6 SAMW25 MR210 510PA Hardware Design Guidelines IEEE802 11 b g n IoT Module USER GUIDE Atmel Atmel 42436A SAMW25 MR210510PA HW Design Guide IEEE802 1 1bgn loT Module_UserGuide_032015 Reference Schematic 3 1 Schematic Figure 3 1 shows the reference schematic for a system using the SAMW25 MR210 510 module Figure 3 1 Reference Schematic VBAT C603 U1 10uF SAMW25 MR210PA KH f es an Test Points for Atmel Use VS 4 UAR i EE ce a D Test Points for Atmel Use TP3 G WI Fi12C SCL ae ee TP6 z WI Fi GPIO_6 H 8 S E WI Fi GPIO_5 4 a WI Fi GPIO_4 z PB11 FP m PB10 L GN D6 FA09 PA08 XO AP zZ ZG 09 a ao 2 Ze up USS ums nowetonde 4 aa ranni oo I2. 32015 Compatible Electronics Inc FAC 3 Lab R 2412MHz XZ Axis Horizontal ki Atmel SAMW25 MR210 510PA Hardware Design Guidelines IEEE802 11 b g n loT Module USER GUIDE 11 Atmel 42436A SAMW25 MR210510PA HW Design Guide IEEE802 1 1bgn loT Module_UserGuide_032015 Compatible Electronics Inc FAC 3 Lab R 2412MHz YZ Axis Horizontal Compatible Electronics Inc FAC 3 Lab R 2412MHz YZ Axis Vertical 12 SAMW25 MR210 510PA Hardware Design Guidelines IEEE802 11 b g n IoT Module USER GUIDE Atmel Atmel 42436A SAMW25 MR210510PA HW Design Guide IEEE802 1 1bgn loT Module_UserGuide_032015 7 FCC Compliance United States FCC This equipment complies with Part 15 of the FCC rules and regulations To fulfill FCC Certification requirements an OEM manufacturer must comply with the following regulations 1 The SAMW25 modular transmitter must be labeled with its own FCC ID number and if the FCC ID is not visible when the module is installed inside another device then the outside of the device into which the module is installed must also display a label referring to the enclosed module This exterior label can use wording such as the following Contains Transmitter Module FCC ID 2ADHKSAMW25 The enclosed device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions i this device may not cause harmful interference and ii this device must accept any interference received in
3. Dee Atmel USER GUIDE SAMW25 MR210 510PA Hardware Design Guidelines IEEE 802 11 b g n loT Module Atmel SmartConnect Introduction This document details the hardware design guidelines for a customer to design the Atmel SAMW25 MR210 510PA module onto their board it l Atmel 42436A SAMW25 MR210510PA HW Design Guide IEEE802 1 1bgn loT Module_UserGuide_032015 1 2 Block Diagram Figure 1 1 Block Diagram of the Module VBAT VCC VDDIO VDDCORE VDDANA VDDIN Printed PCB Antenna Chip_En VDDIO Reset n Wake SAMD21G18A SPI ATWINGC1500 Sica MCU 802 11 B G N SOC IRQn JI 26 MHz DC ATECC508A GPIO_3 4 5 6 SAMW25 MR210 510PA Hardware Design Guidelines IEEE802 11 b g n loT Module USER GUIDE Atmel 42436A SAMW25 MR210510PA HW Design Guide IEEE802 11bgn loT Module_UserGuide_032015 Atmel 2 Pinout Information 2 1 Pin Description Figure 2 1 GND UART_TxD VART_RxD Wi Fi Chip_En Wi Fi GPIO_4 RTC Wi FIGPIO_ 3 VBAT PA16 PAI7 GND PAIS PA19 PA20 PA21 PA22 PA23 GND PA24 USB_DM PA2SIUSB_DP GND Atmel Pin Assignment Top View m Pi eet E f P3 fj Pa Ces P6 E P7 E ps eat I P10 Ge ri ae pia E P13 E Pig E pis I pis E P17 I pis P19 E p20 PB22 Sea PB23 2 p23 RESETN 2 p24 pazorswcLKk 7 p25 Pa3uswDoio 2 p26 pBo2 2 p27 PBos 2 p28 PAO01 GP
4. HW Design Guide IEEE802 11bgn loT Module_UserGuide_032015 Atmel Atmel logo and combinations thereof Enabling Unlimited Possibilities and others are registered trademarks or trademarks of Atmel Corporation in U S and other countries ARM ARM Connected logo and others are the registered trademarks or trademarks of ARM Ltd Other terms and product names may be trademarks of others DISCLAIMER The information in this document is provided in connection with Atmel products No license express or implied by estoppel or otherwise to any intellectual property right is granted by this document or in connection with the sale of Atmel products EXCEPT AS SET FORTH IN THE ATMEL TERMS AND CONDITIONS OF SALES LOCATED ON THE ATMEL WEBSITE ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTY OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE OR NON INFRINGEMENT IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT INDIRECT CONSEQUENTIAL PUNITIVE SPECIAL OR INCIDENTAL DAMAGES INCLUDING WITHOUT LIMITATION DAMAGES FOR LOSS AND PROFITS BUSINESS INTERRUPTION OR LOSS OF INFORMATION ARISING OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES Atmel makes no representations or warranties with respect to the accuracy or completeness of the contents of this document and reserves
5. IO Ea P30 XOUT32 PS1 E cno eso PS p49 E pas E Pa7 E P46 pas E pas P43 EH Pa2 E p41 E p40 E P39 D P38 E P37 E P36 E P35 i P34 E P33 E giel all Wi Fi Reset_n Wi Fi i2C_SDA Wi Fi I2C_SCL Wi Fi GPIO_6 WI FI GPIO_5 Wi Fi GPIO_4 PB11 PB10 GND PA11 PA10 PA09 PA08 PA06 PA05 PAO4 PAO3 SAMW25 MR210 510PA Hardware Design Guidelines IEEE802 11 b g n loT Module USER GUIDE Atmel 42436A SAMW25 MR210510PA HW Design Guide IEEE802 1 1bgn loT Module_UserGuide_032015 Table 2 1 Pin Description Programmable Pull up down Resistor Pin Pin Description I O Type Function default Currently used only for Atmel de UART_TxD ATWINC1500 Output bug Not for customer use Leave Yes Pull up unconnected Currently used only for Atmel de UART_RxD ATWINC1500 Input bug Not for customer use Leave a Yes Pull up unconnected Currently used only for Atmel de Wi Fi Chip_En ATWINC1500 Input bug Not for customer use Leave unconnected ATWINC1500 General purpose I O Can also be used to input a Wi Fi GPIO_1 RTC ATWINC1500 I O 32 768kHz Real Time Clock for accurate timing of Wi Fi sleep in tervals GPIO 3 ATWINC1500 I O GE EEN EE reelle Supply for Wi Fi RF Power Ampli Yes Pull up 7 VBAT Power fier and Internal 1 3V Switching Regulator aa GND Power oD EC Power Ground PA24 USB_DM Multifunction eg Interface USB Data M
6. Max Unit Description ta ms VCC fall to VBATT fall VBATT and VCC can fall simultaneously or can be tied together VBATT must not fall before VCC tR 0 1 V us DC supply peripheral I Os internal regulator and analog supply voltage 5 Placement and Routing Guidelines lt is critical to follow the recommendations listed below to achieve the best RF performance e When the module is placed on the motherboard a provision for the antenna must be made There should be nothing under the portion of the module which contains the antenna This means the antenna should not be placed directly on top of the motherboard PCB This can be accomplished by for example placing the module at the edge of the board such that the module edge with the antenna extends beyond the main board edge by 6 5mm Alternatively a cutout in the motherboard can be provided under the antenna The cutout should be at least 22 x 6 5mm Ground vias spaced 2 5mm apart should be placed all around the perimeter of the cutout No large components should be placed near the antenna e Place a 10uF decoupling capacitor from VBAT to ground right next to pin 7 Place another 10uF capacitor from VCC to ground right next to pin 21 e The main board should have a solid ground plane Each ground pin of the module including each of the center ground pads should have a via placed either in the pad or right next to the pad going down to the ground plane e To avoid electromagnetic field b
7. cluding interference that may cause undesired operation Any similar wording that expresses the same meaning may be used IMPORTANT Each module has a label with an FCC ID however the product User Manual must contain the following statement This equipment 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 FCC 15 19 The module must be installed into the end product to provide a separation distance of at least 6 5 cm from all persons and must not be co located or operating in conjunction with any other antenna or transmitter IMPORTANT Modifications not expressly approved by this company could void the user s authority to operate this equipment FCC section 15 21 IMPORTANT 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 cau
8. e with clear description of High level Arch overview on how to write a net working application list all API parameters and structures Features of the device SPl nandshake protocol between device and host MCU with flow sequence state diagram timing SW Design Guide Explain in details the flow chart and how to use each API to implement all generic use cases SW Programmer guide e g start AP start STA provisioning UDP TCP http TLS p2p errors management con nection transfer recovery mechanism state diagram usage and sample application note For a complete listing of develooment support tools and documentation visit htto www atmel com or contact the nearest Atmel field representative 14 SAMW25 MR210 510PA Hardware Design Guidelines IEEE802 11 b g n loT Module USER GUIDE Atmel Atmel 42436A SAMW25 MR210510PA HW Design Guide IEEE802 1 1bgn loT Module_UserGuide_032015 10 Revision History Doc Rev Date Comments 42436A 03 2015 Initial document release Atmel SAMW25 MR210 510PA Hardware Design Guidelines IEEE802 11 b g n IoT Module USER GUIDE 15 Atmel 42436A SAMW25 MR210510PA HW Design Guide IEEE802 1 1bgn loT Module_UserGuide_032015 CONNECTED Altmel Enabling Unlimited Possibilities y fin W Atmel Corporation 1600 Technology Drive San Jose CA 95110 USA T 1 408 441 0311 F 1 408 436 4200 www atmel com 2015 Atmel Corporation Rev Atmel 42436A SAMW 25 MR210510PA
9. inus Input see SAM D21G System Reset Low level on this RESET_N l Datasheet pin resets the entire module SAMW25 MR210 510PA Hardware Design Guidelines IEEE802 11 b g n loT Module USER GUIDE Atmel Atmel 42436A SAMW25 MR210510PA HW Design Guide IEEE802 1 1bgn loT Module_UserGuide_032015 GND GND 2 VCC zech N 15 16 18 19 20 J 22 23 24 Yes Yes Yes Yes Yes Atmel SAMW25 MR210 510PA Hardware Design Guidelines IEEE802 11 b g n IoT Module USER GUIDE Programmable Pull up down Resistor j j 3 25 PA30 SWCLK Multifunction Cortex Serial Wire Debug Inter wes face CLK 26 PA31 SWDIO Multifunction Cortex Serial Wire Debug Inter Yes face Data I O Yes 27 Multifunction See SAM D21G Datasheet 28 Multifunction See SAM D21G Datasheet Yes 29 Multifunction See SAM D21G Datasheet Yes 30 Multifunction See SAM D21G Datasheet Yes 31 I O See SAM D21G Datasheet Yes 33 Multifunction 34 Multifunction 35 Multifunction 36 Multifunction 37 Multifunction 38 Multifunction See SAM D21G Datasheet Yes 39 Multifunction See SAM D21G Datasheet Yes em nm nam ren mmm See SAMD21G Datasheet Yes Yes Currently used only for Atmel de 48 Wi Fi l2C_SCL ATWINC1500 I O bug Not for customer use Leave unconnected Pin Pin Description I O Type Function default Ground Yes See SAM D21G Datasheet See SAM D21G Datasheet See SAM D21G Datasheet See SAM D21G Datasheet Yes See SAM D21G Datasheet Yes
10. locking keep large metal objects as far away from antenna as possible e Do not enclose the antenna within a metal shield e Keep any components which may radiate noise or signals within the 2 4 2 5GHz frequency band far away from the antenna or better yet shield those components Any noise radiated from the main board in this frequency band will degrade the sensitivity of the module Atmel SAMW25 MR210 510PA Hardware Design Guidelines IEEE802 11 b g n loT Module USER GUIDE 9 Atmel 42436A SAMW25 MR210510PA HW Design Guide IEEE802 1 1bgn loT Module_UserGuide_032015 D Antenna Performance Printed PCB antenna on the SAMW25 MR210P is a meandered Inverted F Antenna IFA The antenna is fed via matching network which is matched for module installed on 1 5mm thick main board Main board thickness deviation by imm will change the RX TX performance by 1dB maximum referring to the RX TX performance with default antenna matching network and installed on a 1 5mm thick main board Measured antenna gain is 6 16dBi Radiated patterns in three directions for horizontal and vertical polarization are shown below Compatible Electronics Inc FAC 3 Lab R 2412MHz XY Axis Horizontal Compatible Electronics Inc FAC 3 Lab R 2412MHz XY Axis Vertical 10 SAMW25 MR210 510PA Hardware Design Guidelines IEEE802 11 b g n loT Module USER GUIDE Atmel Atmel 42436A SAMW25 MR210510PA HW Design Guide IEEE802 1 1bgn loT Module_UserGuide_0
11. p A rch VDDIO z Riles kekki P p C04 10uF Z Resetn Atmel SAMW25 MR210 510PA Hardware Design Guidelines IEEE802 11 b g n loT Module USER GUIDE 7 Atmel 42436A SAMW25 MR210510PA HW Design Guide IEEE802 1 1bgn loT Module_UserGuide_032015 4 1 4 2 4 3 8 Notes on Interfacing to the SAMW25 Module Programmable Pull up Resistors The SAMW25 MR210PA provides programmable pull up resistors on pins 2 3 45 46 47 48 and 49 The purpose of these resistors is to keep any unused input pins from floating which can cause excess current to flow through the input buffer from the VCC supply Any unused module pin on the SAMW25 MR210PA should leave these pull up resistors enabled so the pin will not float The default state at power up Is for the pull up resistor to be enabled However any pin used should have the pull up resistor disabled The reason for this is that if any pins are driven to a low level while the SAMW25 MR210PA is in the low power sleep state current will flow from the VCC supply through the pull up resistors increasing the current consumption of the module Since the value of the pull up resistor is approximately 100kQ the current through any pull up resistor that is being driven low will be VCC 100kQ For VCC 3 3V the current through each pull up resistor that is driven low would be approximately 3 8V 100kQ 33uA Pins which are used and have had the programmable pull up resistor disabled should always be acti
12. se 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 module product Increase the separation between the equipment and module product Consult the dealer or an experienced radio TV technician for help 8 Interfaces All Communication with the SAMW25 is handled by the internal SAMD21 device For further information on supported interfaces timing drive strengths etc refer to the SAMD21 HW design Guide Atmel SAMW25 MR210 510PA Hardware Design Guidelines IEEE802 11 b g n loT Module USER GUIDE 13 Atmel 42436A SAMW25 MR210510PA HW Design Guide IEEE802 1 1bgn loT Module_UserGuide_032015 H Reference Documentation and Support 9 1 Reference Documents Atmel offers a set of collateral documentation to ease integration and device ramp The following list of documents available on the Atmel web or integrated into development tools Table 9 1 Reference Documents Title Content User Guide Schematic PCB layout Gerber BOM and System notes on RF Radio Full Test Report radiation pattern design guidelines temperature performance ESD Platform Getting How to use package Out of the Box starting guide HW limitations and notes SW Quick started Guide start guidelines Design Files Package HW Design Guide This document Integration guid
13. the right to make changes to specifications and products descriptions at any time without notice Atmel does not make any commitment to update the information contained herein Unless specifically provided otherwise Atmel products are not suitable for and shall not be used in automotive applications Atmel products are not intended authorized or warranted for use as components in applications intended to support or sustain life SAFETY CRITICAL MILITARY AND AUTOMOTIVE APPLICATIONS DISCLAIMER Atmel products are not designed for and will not be used in connection with any applic ations where the failure of such products would reasonably be expected to result in significant personal injury or death Safety Critical Applications without an Atmel officer s specific written consent Safety Critical Applications include without limitation life support devices and systems equipment or systems for the operation of nuclear facilities and weapons systems Atmel products are not designed nor intended for use in military or aerospace applications or environments unless specifically designated by Atmel as military grade Atmel products are not designed nor intended for use in automotive applications unless specifically designated by Atmel as automotive grade
14. vely driven to either a high or low level and not be allowed to float See the SAMW25 MR210PA Programming Guide for information on enabling disabling the programmable pull up resistors Restrictions for Power States When no power is supplied to the device i e the DC DC Converter output and VCC are both off at ground potential In this case a voltage cannot be applied to the device pins because each pin contains an ESD diode from the pin to supply This diode will turn ON when voltage higher than one diode drop is supplied to the pin If a voltage must be applied to the signal pads while the chip is in a low power state the VCC supply must be on so the SLEEP or Power_Down state must be used Similarly to prevent the pin to ground diode from turning on do not apply a voltage that is more than one diode drop below ground to any pin Power up down Sequence The power up down sequence for SAMW25A is shown in Figure 4 1 The timing parameters are provided in Table 4 1 Figure 4 1 Power up down Sequence tn Table 4 1 Power up down Sequence Timing Parameter Min Max Unit Description ta ms VBATT rise to VCC rise VBATT and VCC can rise simultaneously or can be tied together VCC must not rise before VBATT SAMW25 MR210 510PA Hardware Design Guidelines IEEE802 11 b g n loT Module USER GUIDE Atmel Atmel 42436A SAMW25 MR210510PA HW Design Guide IEEE802 1 1bgn loT Module_UserGuide_032015 Parameter Min
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