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