MotorolaC123 » History » Revision 22
Revision 21 (fixeria, 05/06/2018 08:24 AM) → Revision 22/24 (laforge, 01/19/2022 08:50 AM)
{{>toc}} 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. !c123_2.jpg! 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]]