User Manual
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1. v mds udi iE dro USBRISWITCHES AND USER LEDS D DA IE ADI cc a POWER MANAGEMEN T isti ei av ausu ac cdd risa d nd DX P POE uu POWER SUPPLE aac KO GLOCKING 54225002 dub T SOFTWARE DEVELOPMENT 9 SOFTWARE DESCRIP TION 5e iE uta s p Cree xe ERES GE Dl ex aa ERN SOURCE CODE eee TOOL OR TIONS Suid i Sasa wa W a PROGRAMMING THE NRF51822 DEVELOPMENT BOARD REFERENCES PCB LAYOUT AND BILL OF MATERIALS 10 REFERENCES COMPONENT LOCATIONS 1 CX CV TN NM SCHEMATICS 11 Copyright 2014 Mommosoft Ltd www mommosoft com Board Overview The nRF51822 development board is a low cost development platform for Nordics ARM Cortex microcontroller nRF51822 _ The main purpose of the board is to accelerate designing debugging and testing of software applications based on nRF51822 Development board set contents The nRF51822 development board set contains the following items nRF51822 development board e 2x20 single row pin headers 2 54mm pitch 4 Copyright 2014 Mommosoft Ltd www mommosoft com Using the nRF51822 development board The recommended steps for us2. The programming debugging of SoC can be done by Serial wire Debug SWD interface connector P3 Software Development Software Description Source Code Tool Options Programming the nRF51822 development board 9 Copyright O 2014 Mommosoft Ltd www mommosoft com References PCB Layout and Bill of Materials References The following useful references are available for download nRF51822 overview other useful downloads from Nordic Microchip s MCP2200 USB to UART serial converter voltage regulator LP2950 Component Locations 10 Copyright 2014 Mommosoft Ltd www mommosoft com Schematics Antenna BAL NRFOIDS m a R4 100R Di GREEN sw zw IT sw 11 Copyright O 2014 Mommosoft Ltd
3. 5V the board will be powered by USB or 5V 5V this is the Vbus from USB The user can use this pin to power other elements with 5V If there is not connection with USB this pin is equal to Vin and can be used to power the board in same way 8 Copyright O 2014 Mommosoft Ltd www mommosoft com 3 3V this is the output LP2950 The user can use this pin to power other elements with 3 3V If no other power sources connected to board this pin can be used to power the board with 3 3V from external stabilized source Clocking The development board uses a 16 0 MHz crystal only to complete the SoC main internal clock circuit Note The 16 0 MHz crystal has to be selected in sources for all of the Nordic Bluetooth ble examples to work Code change Clock source needs to be CLOCK LFCLKSRC SYNTH 250 PPM when you call SOFTDEVICE HANDLER INIT macro SOFTDEVICE HANDLER INIT NRF CLOCK LFCLKSRC SYNTH 250 PPM If the user plans to use 32 768 kHz crystal it can be added using pins from connector P2 pin 14 P0 27 and pin 15 P0 26 The Pin P0 27 must be cut from Blue LED circuitry by cutting place Reset As itis described in nRFF51 Series Reference Manual the pins SWDIO and nRESET share the same physical pin This means that in Debug mode the only way for full reset is removing and re applying voltage to the chip This can be done by removing jumper from connector P4 and putting it back Debugger Interface DIF
4. Mommosoft Ltd www mommosoft com Headers There are two rows of 20 holes on the board They form connectors labeled P1 and P2 The set contains two 20 pin headers that can be soldered to these connectors This is useful for working with breadboards or for stacking The connector P3 is for programming debugging by SWD interface VTG 1 2 SWDIO GND 3 SWDCLK GND 5 6 7 8 GND 9 10 NC The connector P4 is for cutting SoC power and doing hardware reset nRF51822 has not reset pin during debugging Power Management Power Supplies SWDIO SWDCLK w Vin T3 3V GREEN PWR 5 C14 Diodes BATSAC 7 T 0 9 Ky Figure 0 2 The power supply scheme is as shown in 3 3V GREEN PWR 6 C14 Diodes BAT54C 4 7uF Figure 0 2 The LP2950 is used to stabilize the voltage to 3 3V the supply voltage for 50 nRF51822 The nRF51822 development board can be supplied with power by 4 sources e USB when the development board is connected to USB port by cable 5V from Vbus is used as power source for development board Keep in mind that usually the normal USB port provides up to 100mA Vin this can be any external unstabilized or stabilized DC voltage source The voltage must be between 4 3V and 30V If the development board is connected to USB port or has power 5 and the voltage applied to Vin is gt 5V the board will be powered by Vin If Vin is
5. ing the nRF51822 development board are e Put the nRF51822 development board on your favorite breadboard Connect the other necessary elements from your project to board by cables Connect the nRF51822 development board to PC by USB mini cable If this is the first connection to PC you will be asked to install the driver for MCP2200 Microchip s USB to UART serial converter embedded into the board Usually the installation is automatic Just in case this is the MCP2200 driver Program and debug using Programmer Debugger and IDE Features The nRF51822 development board includes the following features nRF51822 Bluetooth low energy and 2 4GHz proprietary SoC USB mini B connector for USB device Red Green Blue and Yellow user LEDs Two user buttons All SoC port pins brought out to headers on a 0 1 in 2 54 mm grid The programming and debugging SWD interface The development board is tested with Programmer Debugger J Link LITE ARM power sources USB device 5V Vin external source from 4 8V to 30V 3 3 external source 3 3V stabilized e MCP2200 additional debugging interface printf etc e Preloaded quick start application blinky e Supports all Nordic s software and examples Specifications Board supply voltage 4 8V to 30V 1 LED on 5mA 5mA per LED Board supply current 2200mils 55 88mm 900mils 22 86mm 5 Copyright O 2014 Mommosoft Ltd ww
6. tion between SoC and PC The GPIO pin P0 06 is used to send data from SoC to bridge and P0 07 is used to send data from bridge to SoC To use this feature the user has to make proper peripheral configuration during initialization process If the user wants to use these pins for other purposes he may cut the connections by special cut places SB7 and SB8 The bridge MCP2200 has GPIO pins that can be configured from PC and used for debugging purposes They are connected to the connectors as follows 6 Copyright O 2014 Mommosoft Ltd www mommosoft com P2 2 When connected as an USB device the development board can be powered from either the USB connector or the external sources P5 t3 3V P3 3 3V GREEN PWR C14 3 Diodes BATSAC 7 5 105 Ky Figure 0 2 User switches and user LEDs The nRF51822 development board comes with Red Green Blue and Yellow LEDs These LEDs can be configured for use in custom user applications They are connected to the following GPIO pins by cutting places Two user buttons are included on the board The user buttons can be configured for use in custom user applications They are connected to the following GPIO pins by cutting places Green SW1 P0 05 SB5 Black SW2 0 04 SB6 If the user wants to use these pins for other purposes he may cut the connections by the cutting places The evaluation board also has a green power LED 7 Copyright 2014
7. w mommosoft com Hardware Description The block diagram in Figure 2 1 shows the main peripheral features of the development board This chapter describes how these peripherals operate and interface to the microcontroller PCB antenna TX USB mini MC P2200 USB to UART Rx connector bridge to P1 P2 GP1 2 3 4 5 nRF51822 sot GPIO SWDCLK GPIO Programmer debugger PWD 57 RGBY Leds connector SWDIO buttons Figure 0 1 Functional description Microcontroller The development board is based on Nordic s nRF512822 SoC an ultra low power 32 bit ARM Cortex MO based microcontroller with 256 KB Flash memory 8 SRAM 16 MHz operation and a wide range of other peripherals See the nRF51822 link for complete device details All of the microcontroller port pins are routed to 0 1 in 2 54 mm pitch connectors P1 and P2 An internal multiplexer allows different peripheral functions to be assigned to each of these GPIO pins When adding external circuitry consider the additional load on the evaluation board power rails The nRF51822 microcontroller is factory programmed with a quickstart demo program The quickstart program resides in on chip Flash memory and runs each time power is applied unless the quickstart application has been replaced with a user program USB Device The development board includes a USB mini B connector to allow for USB 2 0 device operation The Microchip s MCP2200 USB to UART bridge is used to make connec
8. www mommosoft com BLE DEV N User manual January 2014 v1 1 1 Copyright O 2014 Mommosoft Ltd www mommosoft com Table of Contents BOARD OVERVIEW DEVELOPMENT BOARD SET CONTENTS USING THE NRF51822 DEVELOPMENT BOARD FEATURES SPECIFICATIONS HARDWARE DESCRIPTION nnn gt FUNCTIONAL DESCRIPTION MICROCONTROLLER USB DEVICE USER SWITCHES AND USER LEDS HEADERS POWER MANAGEMENT POWER SUPPLIES CLOCKING RESET DEBUGGER INTERFACE DIF SOFTWARE DEVELOPMENT OD O OO SOFTWARE DESCRIPTION SOURCE CODE TOOL OPTIONS PROGRAMMING THE NRF51822 DEVELOPMENT BOARD REFERENCES PCB LAYOUT AND BILL OF MATERIALS 242344 9 10 REFERENCES COMPONENT LOCATIONS SCHEMATICS 10 11 2 Copyright 2014 Mommosoft Ltd www mommosoft com BOARD OVERVIEW 4 DEVELOPMENT BOARD SET CONTENTS USING THENRF51822 DEVELOPMENT BOARD J J PEATURES uu qua QI sac OO FILET INSTR DELI EUER EUER akaspapas saa NAA SPECIFICATIONS etie Deere x REOR EXE AEN De FR EN VER DN LIE RU Ld IEEE Y asua HARDWARE DESCRIPTION 6 FUNCTIONAL DESCRIPTION u u DoD A E D REVO VA RU DER UR FIR ER EU TU IU D I IIO CDU QUO DUDAS NMICROCONTRODEERB un tr E DE E NE SIUE USE DEVICE u can
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