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laforge, 02/19/2016 10:48 PM
add page on C155
= 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.
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?)
=== 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.
Updated by laforge about 8 years ago · 1 revisions