Hardware » History » Version 5
laforge, 02/19/2016 10:50 PM
add block diagram
| 1 | 3 | laforge | [[PageOutline]] |
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| 2 | 1 | laforge | = OsmoSDR Hardware = |
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| 4 | The OsmoSDR hardware consists of an oscillator, Zero-IF silicon tuner, ADC, FPGA and a USB-capable microcontroller. |
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| 6 | 5 | laforge | The block schematics looks like this: |
| 7 | [[Image(osmo_sdr_block.png)]] |
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| 8 | 1 | laforge | |
| 9 | == Major Components == |
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| 10 | |||
| 11 | === Atmel AT91SAM3U Microcontroller === |
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| 13 | The SAM3U is a quite powerful but inexpensive Cortex-M3 based Microcontroller. What makes it special compared |
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| 14 | to many other devices is its integrated USB 2.0 High-Speed device, combined with scatter-gather DMA and an internal |
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| 15 | memory/bus architecture that can actually drive the USB 2.0 at 480Mbps without any problems. |
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| 17 | The SAM3U [wiki:Firmware] will be available as Free Software / Open Source in our git repository. |
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| 19 | 4 | laforge | * Homepage: http://www.atmel.com/sam3u |
| 20 | * Data Sheet: http://www.atmel.com/dyn/resources/prod_documents/doc6430.pdf |
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| 22 | 1 | laforge | === Lattice XFP2 FPGA === |
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| 24 | The FPGA is mainly intended to interface the ADC with the SSC peripheral of the SAM3U. However, it is reasonable |
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| 25 | to assume it can do some simple filtering, too. |
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| 27 | The FPGA design will be available as Free Software / Open Source in our git repository |
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| 28 | |||
| 29 | === Analog Devices AD7357 ADC === |
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| 31 | This ADC provides two channels (I and Q) and can run at up to 4.2 Megasamples / second and provides 14 bits of resolution. |
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| 33 | 4 | laforge | * Homepage: http://www.analog.com/en/analog-to-digital-converters/ad-converters/ad7357/products/product.html |
| 34 | * Data Sheet: http://www.analog.com/static/imported-files/data_sheets/AD7357.pdf |
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| 36 | 1 | laforge | === Silicon Tuner === |
| 37 | |||
| 38 | FIXME |
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| 40 | === !SiLabs Si570 Oscillator === |
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| 41 | 3 | laforge | |
| 42 | The Si570 is a 10MHz to 1.4GHz programmable oscillator. The exact frequency can be set and adjusted via an I2C interface. |
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| 44 | 4 | laforge | * Data Sheet: http://www.silabs.com/Support%20Documents/TechnicalDocs/si570.pdf |
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| 46 | 1 | laforge | == Status == |
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| 48 | 4 | laforge | * As of 13 December 2011, we had the first 5 prototypes |
| 49 | * As of 28 December 2011, we have hardware verification code and detected some bugs that need a 2nd PCB revision |
