MotorolaC155 » History » Version 11
Anonymous, 02/19/2016 10:48 PM
Add schematics infos
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 | 8 | laforge | * JTAG seems accessible, though this is unconfirmed |
13 | 7 | laforge | |
14 | 1 | laforge | == Specifications == |
15 | * GSM 900 / GSM 1800 dual-band |
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16 | * 101x45x21 mm, 86 grams |
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17 | * GPRS |
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18 | * 920mAh Li-Ion battery |
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19 | * Ti Calypso/Iota/Rita chipset |
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20 | |||
21 | == Hardware == |
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22 | 10 | laforge | [[Image(c155_pcb.jpg, 50%)]] |
23 | 1 | laforge | |
24 | 11 | laforge | === Schematics === |
25 | |||
26 | Schematics ( Sch_C155_A3_C_L3_1.0.pdf ) can be found on this site: http://globalsupport.ru/file.php?id=48&oper=d (among others). The captcha is a b**** but it'll work in the end. |
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27 | |||
28 | 1 | laforge | === GSM Chipset === |
29 | |||
30 | * DBB: Ti Calypso Baseband, D751749GHH model (Calypso Lite G2), includes 256kBytes of internal SRAM |
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31 | * ABB: Ti TWL3014C |
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32 | * RF: TRF6151C |
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33 | * RF PA: SKY77324-12 |
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34 | |||
35 | === NOR Flash + SRAM === |
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36 | * Intel RD38F2030W0ZBQ1 |
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37 | * 64MBit NOR (8 MByte), bottom boot |
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38 | * 16Mbit SRAM (2 MByte) |
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39 | * Data sheet is in our git repository |
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40 | |||
41 | === Display === |
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42 | |||
43 | The display is a 96x64 pixels CSTN color LCD, attached via SPI bus to the Calypso DBB chip. |
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44 | |||
45 | 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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46 | We need a proper C language driver for it (any volunteers?) |
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47 | |||
48 | 3 | laforge | === Audio Ringtone Chip === |
49 | |||
50 | It uses a Sunplus SPMA100B chip. Datasheet unknown. |
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51 | |||
52 | 1 | laforge | === Test Points === |
53 | |||
54 | ==== Test points accessible from battery compartment ==== |
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55 | 6 | laforge | [[Image(MotorolaC123:compal_testpads.png)]] |
56 | 1 | laforge | |
57 | Left Row of pins (from left to right |
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58 | * TP108 -- GND |
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59 | * TP29 -- GND (used to be VADCID) |
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60 | * TP37 -- GND (used to be Rx IRDA) |
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61 | * TP27 -- DLPWR (download power on), connects to Iota:RPWON |
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62 | * TP36 -- GND (used to be Tx IRDA) |
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63 | * TP10 -- DTR Modem |
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64 | |||
65 | Right row of pins (from left to right) |
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66 | * TP8 -- TDI JTAG |
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67 | * TP11 -- DSR Modem |
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68 | * TP9 -- CTS Modem |
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69 | * TP18 -- TMS JTAG |
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70 | * TP13 -- TxD Modem |
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71 | * TP16 -- TDO JTAG |
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72 | * TP21 -- RTS Modem |
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73 | * TP17 -- TCK JTAG |
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74 | * TP14 -- RxD Modem |
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75 | * TP3 -- DLPWR |
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76 | |||
77 | 4 | laforge | === PCB photographs === |
78 | |||
79 | Available from [http://laforge.gnumonks.org/photoalbum/devices/motorola_compal/c155] |
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80 | |||
81 | 1 | laforge | == Misc Notes == |
82 | |||
83 | === Bootloader === |
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84 | |||
85 | 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 |
86 | 1 | laforge | object code to switch back to ARM mode before jumping to the start routine. |