Custom Calypso Board » History » Version 3
laforge, 02/19/2016 10:49 PM
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| 2 | 3 | laforge | h1. Custom Calypso Board |
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| 5 | 1 | laforge | This wiki page is about creating a custom TI calypso board. |
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| 7 | The rationale is quite simple: The supply of Motorola/Compal phones is limited, and the quality that's available |
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| 8 | at this point often is some quite extensively repaired (not just refurbished) phones. |
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| 10 | As the TI Calypso/Iota/Rita chipset is still available in quantity from the grey market, we can simply build our |
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| 11 | own board from it. |
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| 14 | 3 | laforge | h2. Existing design |
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| 17 | 1 | laforge | We have an existing Ti Calypso design similar to that used in the Compal/Motorola phones. |
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| 19 | It does not have an interface for LCM or Keypad. |
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| 22 | 3 | laforge | h2. Intended features |
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| 25 | * expose JTAG on a standard header |
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| 26 | * board-edge connector for plugging many boards into one backplane |
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| 27 | * external clock input / buffered clock output |
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| 28 | * RF connector standard u.fl or SMA or optionally separate Rx/Tx on the back-plane |
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| 29 | * I2C/SPI and both UARTs available on headers |
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| 30 | * on-board EEPROM for storing persistent data, even beyond NOR flashing |
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| 31 | * SIM card slot, SIM interface also present on header |
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| 32 | * additional / unused TPU ports |
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| 33 | * header for TSP / TPU and all data/control interfaces between iota/rita/calypso |
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| 34 | * RTC crystal and footprint for backup battery |
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| 35 | * version of the board with uplink / downlink filters switched |
