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MotorolaC123 » History » Version 17

steve-m, 02/19/2016 10:48 PM
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[[PageOutline]]
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= Motorola C123 =
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The C123 seems to be one of many ODM phones that Motorola bought from Compal communications in Taiwan.  It seems (nearly?) identical with the C118.
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The internal name of the hardware is E88
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== Specifications ==
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 * GSM 900 / GSM 1800 dual-band
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 * 101x45x21 mm, 86 grams
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 * no GPRS
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 * 920mAh Li-Ion battery
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 * Ti Calypso/Iota/Rita chipset
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== Hardware ==
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[[Image(MotorolaC123:c123_pcb.jpg, right, 33%)]]
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=== Schematics ===
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The schematics (part of the Level 3 Service Manual) can be found at various mobile phone related
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websites, including http://www.uydudoktoru.com/dosyalar/gsmschema/20061016154029.rar
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=== GSM Chipset ===
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 * DBB: Ti Calypso Baseband, D751749ZHH model (Calypso Lite G2), includes 256kBytes of internal SRAM
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 * ABB: Ti TWL3025BZGR
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 * RF: TRF6151C
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 * RF PA: SKY77324-12
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=== NOR Flash ===
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 * Intel 28F160C3TD (16Mbits, i.e. 2 MByte) Advanced+ Boot Block Flash Memory (C3)
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 * Data sheet will be in git
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=== SRAM ===
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 * ESMT M24L2161128SA-70BE (128k x16, i.e. 256kByte)
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 * Data sheet [http://www.esmt.com.tw/DB/manager/upload/M24L216128SA.pdf available from vendor]
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=== Display ===
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The display is a 96x64 pixels monochrome LCD, attached via I2C bus to the Calypso DBB chip.
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The LCD controller inside the display is a [http://www.sitronix.com.tw/sitronix/product.nsf/Doc/ST7558?OpenDocument Sitronix ST7558],
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for which the data sheet is available.  There is a community-based 
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[https://calypso.gnumonks.org/trac/browser/phone/motorola_compal/C115/example_project driver implemented in PIC16 assembly] (in our git repository)
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=== Test Points ===
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==== Test points surrounding Iota ====
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 * TP4 -- BS_TDO, the JTAG TDO signal of the Iota (connected to TDI of Calypso)
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 * TP5 -- Iota:TESTV pin
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 * TP7 -- Uita:CK13M, connected from Calypso:CLK13M_OUT
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 * TP29 -- Iota:ADIN1 (VADCID)
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 * TP111 -- Iota:UDR (USP Rx), connects to Calypso:MCUDO
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 * TP110 -- Iota:UEN (USP Enable), connects to Calypso:MCUEN0
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 * TP112 -- Iota:ONNOFF
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 * TP114 -- Intoa:ITWAKEUP, connects to Calypso:RTC_ALARM
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 * TP113 -- Iota:RESPWONZ, connects to Calypso:RTSPWRONZ
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 * TP116 -- Iota:TEST3
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 * TP117 -- Iota:TEST4
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==== Test points surrounding Calypso ====
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 * TP11 -- Calypso:DSR_MODEM
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 * TP12 -- Calypso:RTS_MODEM
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 * TP23 -- Calypso:nCS4
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 * TP46 -- Calypso:CLK32K_OUT, connects to Iota:CK32K
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 * TP118 -- Calypso:EXT_IRQ, connects to Iota:INT2
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 * TP115 -- Calypso:EXT_FIQ, connects to Iota:INT1
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 * TP45 -- Calypso:SCLK (I2C)
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 * TP30 -- Calypso:nSCS1 (I2C)
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 * TP44 -- Calypso:SDO (I2C)
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 * TP34 -- Calyspo:nCS2
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 * TP48 -- Calypso:nCS3/INT4N
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 * TP49 -- Calypso:VRDBB_1.5V
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 * J2 -- Calypso NM_DAI_INTERFACE (MCSI_TXD, MCSI_CLK, MCSI_RXD, MCSI_RSYNCH, GND)
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  * [[Image(MotorolaC123:mcsi_pinout.jpg, 20%)]]
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==== Test points accessible from battery compartment ====
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[[Image(MotorolaC123:compal_testpads.png)]]
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On the C123 the following pads are usable
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 * TP27 -- DLPWR (download power on), connects to Iota:RPWON
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 * TP14 -- RxD Modem
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 * TP13 -- TxD Modem
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 * TP9 -- CTS Modem
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 * TP39 -- GND
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On most phones other pads are grounded and not usable (like in the scan above).
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Known exceptions
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 * C115 and C117 have all test pads
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 * C155 has JTAG but not IRDA UART test pads
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=== Charger Connector ===
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The charger connector is a barrel-type with 3mm diameter and a segmented shaft. The top ring is not connected, the lower ring is GND. The top pin supplies +5V to the phone.
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[[Image(MotorolaC123:c123_charger_connector.jpg, 33%)]]
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=== Antenna Connector ===
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The antenna connector is a [http://www.hirose-connectors.com/connectors/H205SeriesGaiyou.aspx?c1=MS-147&c3=3 MS-147].
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=== PCB photographs ===
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Available from [http://laforge.gnumonks.org/photoalbum/devices/motorola_compal/c123]
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Pictures of each individual PCB layer can be found here: [http://www.steve-m.de/pictures/compal_e88/]
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