Solutions for a Real Time World NEMO2 Design Guidelines Application note Unigen Corp. Wireless Module Products NEMO Bluetooth Radio Modules UGWC821RSMA133 Design Guidelines Application Note Issue Date: April 3rd, 2012 Revision: 1.
Solutions for a Real Time World NEMO2 Design Guidelines Application note CONTENTS Contents ........................................................................................................................................................ 2 List of Figures ................................................................................................................................................ 4 List of Tables ......................................................................................
Solutions for a Real Time World NEMO2 Design Guidelines Application note Antenna & External RF Path .................................................................................................................... 24 Microstrip Transmission Line Specification ............................................................................................ 25 Microstrip PCB Board Details: .................................................................................................................
Solutions for a Real Time World NEMO2 Design Guidelines Application note LIST OF FIGURES Figure 1: Nemo2 Basic Block Diagram .......................................................................................................... 9 Figure 2: CSR BlueCore 6 Chipset Block Diagram ........................................................................................ 10 Figure 3: NEMO2 Elaborate Block Diagram ................................................................................................
Solutions for a Real Time World NEMO2 Design Guidelines Application note LIST OF TABLES Table 1: NEMO2 LGA Pad Description ........................................................................................................ 13 Table 2: NEMO2 Evaluation Board BOM.....................................................................................................
Solutions for a Real Time World NEMO2 Design Guidelines Application note SCOPE The purpose of this document is to describe the functionality, operation, specific design restrictions and guidelines of the NEMO2 module for integration and regulatory/certification explanation with approved partners. Design integration is important to comply with FCC/IC regulatory limited module approvals.
Solutions for a Real Time World NEMO2 Design Guidelines Application note 4. Limited split-modular transmitter: a split-modular transmitter that complies with the definition and technical rules for split modules only when constrained to specific operating host(s), and/or associated grant condition(s). A host product is required to comply with all applicable FCC equipment authorizations regulations, requirements and equipment functions not associated with the transmitter module portion.
Solutions for a Real Time World NEMO2 Design Guidelines Application note The Nemo2 module is a complete Bluetooth 2.4GHz radio transceiver operating in the license free ISM (Industrial, Scientific and Medical) band. The Nemo module has CSR’s BlueCore 6 ROM Bluetooth solution. The CSR BlueCore 6 ROM is a single-chip radio and baseband IC for Bluetooth 2.4GHz systems including enhanced data rate (EDR) to 3Mbps. With the on-chip CSR Bluetooth software stack, it provides a fully compliant Bluetooth v2.
Solutions for a Real Time World NEMO2 Design Guidelines Application note FUNCTIONAL BLOCK DIAGRAMS Figure 1: Nemo2 Basic Block Diagram
Solutions for a Real Time World NEMO2 Design Guidelines Application note Figure 2: CSR BlueCore 6 Chipset Block Diagram
Solutions for a Real Time World NEMO2 Design Guidelines Application note Figure 3: NEMO2 Elaborate Block Diagram
NEMO2 Design Guidelines Solutions for a Real Time World Application note NEMO2 LGA FORM FACTOR Nemo2 is a 26 pad LGA surface mount LGA module. The 26 pads interfaces the module to a host and host PCB with power supply, ground, digital UART communications, regulator enable, PCM audio bus, digital PIOs and single RF output.
NEMO2 Design Guidelines Solutions for a Real Time World Application note Table 1: NEMO2 LGA Pad Description Pin Signal Name Type 1 CLK32K_IN Input 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Note: Active SDIO_SD_CSB Input SDIO_SD_CMD -SDIO_SD_CLK -GND -PIO(0) I/O PIO(1) I/O PIO(4) I/O PIO(5) I/O PIO(7) I/O GND -GND -ANT_OUT -GND -GND -PCM_CLK -PCM_OUT -PCM_IN -PCM_SYNC -GND -UART_RX/SDIO_DATA[2] I/O UART_RTS/SDIO_DATA[1] I/O UARTCTS/SDIO_DATA[3] I/O UART_TX/SDIO_D
NEMO2 Design Guidelines Solutions for a Real Time World Application note NEMO2 REFERENCE EVALUATION BOARD The Nemo2 reference evaluation board is used for testing and evaluation of the Nemo2 product for performance testing, application evaluation, software testing and RF performance testing. The Nemo2 reference evaluation board was also used for Bluetooth, FCC, IC and ETSI certification testing.
Solutions for a Real Time World NEMO2 Design Guidelines Application note Schematic
NEMO2 Design Guidelines Solutions for a Real Time World Application note Nemo2 Evaluation Board BOM Table 2: NEMO2 Evaluation Board BOM Description Qty Reference Designator Part Number(s) Manufacturer (s) CONN SMA FEMALE EDGE MOUNT 0.031IN THK BD 1.0 ANT1 CONREVSMA003.031 LINX TECHNOLOGIES CONN HDR 3POS 2.54MM AU VERT TH 2.0 JUMP1,JUMP2 TSW-103-07-G-S SAMTEC CONN HDR 7x2 2.54MM VERT THRUHOLE 1 CON4 TSW-107-07-G-D SAMTEC CONN SOCKET 17x2 2MM SQ TAIL TH 1.
Solutions for a Real Time World NEMO2 Design Guidelines Application note PCB Layout Component Layout Figure 6: NEMO2 Evaluation Board Component Layout
Solutions for a Real Time World NEMO2 Design Guidelines Application note Top Layer (Layer 1) Figure 7: NEMO2 Evaluation Board Top Layer 1 Ground Layer (Layer 2) Figure 8: NEMO2 Evaluation Board Ground Layer 2
Solutions for a Real Time World NEMO2 Design Guidelines Application note VDD Layer (Layer 3) Figure 9: NEMO2 Power Plane Layer 3
Solutions for a Real Time World NEMO2 Design Guidelines Application note Bottom Layer (Layer 4) Figure 10: NEMO2 Bottom Signal Layer 4
Solutions for a Real Time World NEMO2 Design Guidelines Application note PCB Stack, Materials, Drill & Notes Figure 11: NEMO2 Evaluation Board PCB Stack Up NOTES: 1.) Material: a. Epoxy glass laminate and prepreg. Type, Standard FR4. Finished external layer 1 oz copper b. Finished thickness 0.8 ± 5%mm 2.) Drilling: a. Diameters in drill table are finished hole sizes, tolerance ± 0.0762mm. b. Teardrop allowed on entry of via on every trace layer 3.) Final Fabrication: a.
Solutions for a Real Time World NEMO2 Design Guidelines Application note Figure 12: NEMO2 Evaluation Board Drill Chart NEMO 2 DESIGN INTEGRATION RULES Nemo2 meets regulatory modular certifications. The use of Nemo2 and integration is important and shall be used for its intended purposes. The use of Nemo2 and integration outside of Unigen’s design rules and use void any certifications with the module or require permissive change and additional testing to meet certifications.
Solutions for a Real Time World NEMO2 Design Guidelines Application note Software and Host Nemo2 is intended to operate with a host. The host will communicate to the module via the physical communication interfaces, UART/SDIO, to control the modules RF operating behavior. The host shall run the Bluetooth Upper software protocol stack operate Nemo2 in Bluetooth modes only. Nemo2 is not intended to operate without a host and Bluetooth protocol stack.
Solutions for a Real Time World NEMO2 Design Guidelines Application note Antenna & External RF Path Nemo2 is not shipped with an on board antenna and an antenna is not fixed on the module. It is the integrators responsibility to handle the design of the antenna design of their product when using Nemo2. NEMO2 was tested and qualified with a 2.
Solutions for a Real Time World NEMO2 Design Guidelines Application note Microstrip Transmission Line Specification The Nemo2 module requires a Microstrip transmission line on the integrators PCB motherboard to route the RF path to an antenna or RF connector. The microstrip on the Nemo2 reference evaluation board was used during testing and certifications. The integrator shall use the exact Microstrip transmission line on the reference evaluation board in the integrators product/design.
Solutions for a Real Time World NEMO2 Design Guidelines Application note Microstrip PCB Board Details: Figure 15: NEMO2 Evaluation Microstrip PCB Stack UP Details Microstrip Ground Reference The Microstrip will have a ground reference on the adjacent inner layer and top (same) layer as the Microstrip. The Nemo2 reference evaluation board has an adjacent ground plane inner layer below the Microstrip. The top layer has a ground reference to the Microstrip as well.
Solutions for a Real Time World NEMO2 Design Guidelines Application note Figure 16: NEMO2 Microstrip Ground Reference A grid of through hole vias are used to join the top layer ground to the adjacent inner layer ground plane. This is known as “stitching”. The integrator should use as much stitching as possible.
Solutions for a Real Time World NEMO2 Design Guidelines Application note External grounding External grounding and care is the integrators responsibility with the Nemo2 module for functionality and RF integration with an antenna or antenna connector. A solid ground reference is needed in particular to the Rf signal path to the terminating component such as an antenna or antenna connector.
Solutions for a Real Time World NEMO2 Design Guidelines Application note RF Shielding The NEMO2 module is not shipped with an RF shield. In order to comply with modular approvals, the integrator must shield the circuitry around the NEMO2 module on the integrators board. The shield must be grounded and shall have an opening for the microstrip transmission line.
Solutions for a Real Time World NEMO2 Design Guidelines Application note Figure 20: NEMO2 Evaluation Board Top Soldermask RF Shield Outline Figure 21: NEMO2 Evaluation Board RF Shield Microstrip gap spacing
Solutions for a Real Time World NEMO2 Design Guidelines Application note Support Contact For any inquiries on the design and support of Nemo2, please contact sales@unigen.
