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MotorolaC155 » History » Revision 3

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laforge, 02/19/2016 10:48 PM
spma100 audio


= Motorola C155 =

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.

The internal name of the hardware is E99.

Specifications * GSM 900 / GSM 1800 dual-band * 101x45x21 mm, 86 grams * GPRS * 920mAh Li-Ion battery * Ti Calypso/Iota/Rita chipset Hardware

=== GSM Chipset ===

  • DBB: Ti Calypso Baseband, D751749GHH model (Calypso Lite G2), includes 256kBytes of internal SRAM
  • ABB: Ti TWL3014C
  • RF: TRF6151C
  • RF PA: SKY77324-12

=== NOR Flash + SRAM === * Intel RD38F2030W0ZBQ1 * 64MBit NOR (8 MByte), bottom boot * 16Mbit SRAM (2 MByte) * Data sheet is in our git repository

=== Display ===

The display is a 96x64 pixels CSTN color LCD, attached via SPI bus to the Calypso DBB chip.

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].
We need a proper C language driver for it (any volunteers?)

=== Audio Ringtone Chip ===

It uses a Sunplus SPMA100B chip. Datasheet unknown.

=== Test Points ===

==== Test points accessible from battery compartment ====

Left Row of pins (from left to right * TP108 -- GND * TP29 -- GND (used to be VADCID) * TP37 -- GND (used to be Rx IRDA) * TP27 -- DLPWR (download power on), connects to Iota:RPWON * TP36 -- GND (used to be Tx IRDA) * TP10 -- DTR Modem

Right row of pins (from left to right) * TP8 -- TDI JTAG * TP11 -- DSR Modem * TP9 -- CTS Modem * TP18 -- TMS JTAG * TP13 -- TxD Modem * TP16 -- TDO JTAG * TP21 -- RTS Modem * TP17 -- TCK JTAG * TP14 -- RxD Modem * TP3 -- DLPWR

Misc Notes

=== Bootloader ===

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
object code to switch back to ARM mode before jumping to the start routine.

Files (4)
c155_pcb.jpg View c155_pcb.jpg 872 KB c155 pcb laforge, 02/19/2010 06:31 PM
osmocom_c155.jpg View osmocom_c155.jpg 47.9 KB Hello world program on the C155 LCD laforge, 03/02/2010 09:21 AM
compal_testpads.png View compal_testpads.png 51.7 KB laforge, 02/21/2016 10:34 AM
c155.jpg View c155.jpg 163 KB laforge, 01/19/2022 08:47 AM

Updated by laforge about 8 years ago · 3 revisions

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