MotorolaC123 » History » Revision 21
Revision 20 (laforge, 02/21/2016 10:32 AM) → Revision 21/24 (fixeria, 05/06/2018 08:24 AM)
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h1. Motorola C123
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.
The internal name of the hardware is E88
h2. Specifications
* GSM 900 / GSM 1800 dual-band
* 101x45x21 mm, 86 grams
* no GPRS
* 920mAh Li-Ion battery
* Ti Calypso/Iota/Rita chipset
h2. Hardware
!{width=66%}c123_pcb.jpg!
h3. Schematics
The schematics (part of the Level 3 Service Manual) can be found at various mobile phone related
websites, including http://www.uydudoktoru.com/dosyalar/gsmschema/20061016154029.rar
h3. GSM Chipset
* DBB: Ti Calypso Baseband, D751749ZHH model (Calypso Lite G2), includes 256kBytes of internal SRAM
* ABB: Ti TWL3025BZGR
* RF: TRF6151C
* RF PA: SKY77324-12
h3. NOR Flash
* Intel 28F160C3TD (16Mbits, i.e. 2 MByte) Advanced+ Boot Block Flash Memory (C3)
* Data sheet will be in git
h3. SRAM
* ESMT M24L2161128SA-70BE (128k x16, i.e. 256kByte)
* Data sheet "available from vendor":http://www.esmt.com.tw/DB/manager/upload/M24L216128SA.pdf
h3. Display
The display is a 96x64 pixels monochrome LCD, attached via I2C bus to the Calypso DBB chip.
The LCD controller inside the display is a "Sitronix ST7558":http://www.sitronix.com.tw/sitronix/product.nsf/Doc/ST7558?OpenDocument,
for which the data sheet is available. There is a community-based
"driver implemented in PIC16 assembly":https://calypso.gnumonks.org/trac/browser/phone/motorola_compal/C115/example_project (in our git repository)
h3. Test Points
h4. Test points surrounding Iota
* TP4 -- BS_TDO, the JTAG TDO signal of the Iota (connected to TDI of Calypso)
* TP5 -- Iota:TESTV pin
* TP7 -- Uita:CK13M, connected from Calypso:CLK13M_OUT
* TP29 -- Iota:ADIN1 (VADCID)
* TP111 -- Iota:UDR (USP Rx), connects to Calypso:MCUDO
* TP110 -- Iota:UEN (USP Enable), connects to Calypso:MCUEN0
* TP112 -- Iota:ONNOFF
* TP114 -- Intoa:ITWAKEUP, connects to Calypso:RTC_ALARM
* TP113 -- Iota:RESPWONZ, connects to Calypso:RTSPWRONZ
* TP116 -- Iota:TEST3
* TP117 -- Iota:TEST4
h4. Test points surrounding Calypso
* TP11 -- Calypso:DSR_MODEM
* TP12 -- Calypso:RTS_MODEM
* TP23 -- Calypso:nCS4
* TP46 -- Calypso:CLK32K_OUT, connects to Iota:CK32K
* TP118 -- Calypso:EXT_IRQ, connects to Iota:INT2
* TP115 -- Calypso:EXT_FIQ, connects to Iota:INT1
* TP45 -- Calypso:SCLK (I2C)
* TP30 -- Calypso:nSCS1 (I2C)
* TP44 -- Calypso:SDO (I2C)
* TP34 -- Calyspo:nCS2
* TP48 -- Calypso:nCS3/INT4N
* TP49 -- Calypso:VRDBB_1.5V
* J2 -- Calypso NM_DAI_INTERFACE (MCSI_TXD, MCSI_CLK, MCSI_RXD, MCSI_RSYNCH, GND)
!mcsi_pinout.jpg!
h4. Test points accessible from battery compartment
!MotorolaC123:compal_testpads.png!
On the C123 the following pads are usable
* TP27 -- DLPWR (download power on), connects to Iota:RPWON
* TP14 -- RxD Modem
* TP13 -- TxD Modem
* TP9 -- CTS Modem
* TP39 -- GND
On most phones other pads are grounded and not usable (like in the scan above).
Known exceptions
* C115 and C117 have all test pads
* C155 has JTAG but not IRDA UART test pads
h3. Charger Connector
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.
!c123_charger_connector.jpg!
h3. Antenna Connector
The antenna connector is a "MS-147":http://www.hirose-connectors.com/connectors/H205SeriesGaiyou.aspx?c1=MS-147&c3=3.
h3. PCB photographs
Available from "Pictures of each individual PCB layer can be found here: [http://www.steve-m.de/pictures/compal_e88/":http://laforge.gnumonks.org/photoalbum/devices/motorola_compal/c123] or at [[MotorolaC123PCB]]
