MotorolaC155 » History » Version 7
laforge, 02/19/2016 10:48 PM
| 1 | 5 | laforge | [[PageOutline]] |
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| 2 | 1 | laforge | = Motorola C155 = |
| 3 | |||
| 4 | The C155 seems to be one of many ODM phones that Motorola bought from Compal communications in Taiwan. It is of the same family as the C118, C123, etc. |
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| 5 | |||
| 6 | 2 | laforge | The internal name of the hardware is E99. |
| 7 | |||
| 8 | 7 | laforge | Compared to the [wiki:MotorolaC123], this phone offers |
| 9 | * a color LCD (same resolution) |
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| 10 | * four times bigger RAM (2MByte) |
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| 11 | * four times bigger NOR Flash (8MByte) |
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| 12 | |||
| 13 | 1 | laforge | == Specifications == |
| 14 | * GSM 900 / GSM 1800 dual-band |
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| 15 | * 101x45x21 mm, 86 grams |
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| 16 | * GPRS |
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| 17 | * 920mAh Li-Ion battery |
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| 18 | * Ti Calypso/Iota/Rita chipset |
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| 19 | |||
| 20 | == Hardware == |
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| 21 | |||
| 22 | === GSM Chipset === |
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| 23 | |||
| 24 | * DBB: Ti Calypso Baseband, D751749GHH model (Calypso Lite G2), includes 256kBytes of internal SRAM |
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| 25 | * ABB: Ti TWL3014C |
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| 26 | * RF: TRF6151C |
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| 27 | * RF PA: SKY77324-12 |
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| 28 | |||
| 29 | === NOR Flash + SRAM === |
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| 30 | * Intel RD38F2030W0ZBQ1 |
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| 31 | * 64MBit NOR (8 MByte), bottom boot |
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| 32 | * 16Mbit SRAM (2 MByte) |
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| 33 | * Data sheet is in our git repository |
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| 34 | |||
| 35 | === Display === |
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| 36 | |||
| 37 | The display is a 96x64 pixels CSTN color LCD, attached via SPI bus to the Calypso DBB chip. |
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| 38 | |||
| 39 | The LCD controller inside the display is a Ultrachip UC1682, for which the data sheet is available at [http://www.datasheet4u.com/html/U/C/1/UC1682_UltraChip.pdf.html]. |
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| 40 | We need a proper C language driver for it (any volunteers?) |
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| 41 | |||
| 42 | 3 | laforge | === Audio Ringtone Chip === |
| 43 | |||
| 44 | It uses a Sunplus SPMA100B chip. Datasheet unknown. |
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| 45 | |||
| 46 | 1 | laforge | === Test Points === |
| 47 | |||
| 48 | ==== Test points accessible from battery compartment ==== |
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| 49 | 6 | laforge | [[Image(MotorolaC123:compal_testpads.png)]] |
| 50 | 1 | laforge | |
| 51 | Left Row of pins (from left to right |
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| 52 | * TP108 -- GND |
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| 53 | * TP29 -- GND (used to be VADCID) |
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| 54 | * TP37 -- GND (used to be Rx IRDA) |
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| 55 | * TP27 -- DLPWR (download power on), connects to Iota:RPWON |
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| 56 | * TP36 -- GND (used to be Tx IRDA) |
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| 57 | * TP10 -- DTR Modem |
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| 58 | |||
| 59 | Right row of pins (from left to right) |
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| 60 | * TP8 -- TDI JTAG |
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| 61 | * TP11 -- DSR Modem |
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| 62 | * TP9 -- CTS Modem |
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| 63 | * TP18 -- TMS JTAG |
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| 64 | * TP13 -- TxD Modem |
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| 65 | * TP16 -- TDO JTAG |
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| 66 | * TP21 -- RTS Modem |
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| 67 | * TP17 -- TCK JTAG |
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| 68 | * TP14 -- RxD Modem |
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| 69 | * TP3 -- DLPWR |
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| 70 | |||
| 71 | 4 | laforge | === PCB photographs === |
| 72 | |||
| 73 | Available from [http://laforge.gnumonks.org/photoalbum/devices/motorola_compal/c155] |
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| 74 | |||
| 75 | 1 | laforge | == Misc Notes == |
| 76 | |||
| 77 | === Bootloader === |
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| 78 | |||
| 79 | 6 | laforge | The RAM loader of the C155 assumes that the payload is a THUMB binary. [wiki:osmocon] thus always prefixes the payload with 32bit of |
| 80 | 1 | laforge | object code to switch back to ARM mode before jumping to the start routine. |
