TypicalCalypsoModemDesign » History » Version 3
laforge, 02/19/2016 10:49 PM
| 1 | 1 | laforge | This modem design is used in the GT-001, GTA01, GTA02, early HXD8 and possibly a number of other older FIC GSM products. |
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| 2 | |||
| 3 | It is a tri-band GSM modem design with support for GPRS. |
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| 4 | 2 | laforge | |
| 5 | The block layout of this modem looks like this: |
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| 6 | [[Image(calypso-block.png)]] |
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| 7 | 3 | laforge | |
| 8 | * Yellow: Clocks |
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| 9 | * Red: Digital Serial interfaces like SPI |
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| 10 | * Green: Analog I/Q differential baseband data |
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| 11 | * Magenta: RF signals |
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| 12 | * Blue: TSP, the time sequence port, sometimes parallel, sometimes serial |
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| 13 | |||
| 14 | Glossary: |
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| 15 | * ABB: Analog Base Band |
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| 16 | * AFC: Automatic Frequency Correction (tuning of the VTXCO by ABB) |
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| 17 | * APC: Automatic Power Correction (Tx Power envelope from ABB to PA) |
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| 18 | * BSP: Baseband Serial Port, like SPI |
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| 19 | * DBB: Digital Base Band, like SPI |
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| 20 | * USP: uController Serial Port |
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| 21 | * RFCLK: A 26MHz master clock generated by the Transceiver |
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| 22 | * CLK13M: 13MHz system clock provided by DBB |
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| 23 | * CLK32K: A 32.768kHz RTC clock signal |
