= 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.

Specifications * GSM 900 / GSM 1800 dual-band * 101x45x21 mm, 86 grams * no GPRS * 920mAh Li-Ion battery * Ti Calypso/Iota/Rita chipset Hardware

=== GSM Chipset ===

• DBB: Ti Calypso Baseband, D751749ZHH model
• ABB: Ti TWL3025BZGR
• RF: TRF6151C
• RF PA: SKY77324-12

=== NOR Flash === * Intel 28F160C3TD (16Mbits, i.e. 2 MByte) Advanced+ Boot Block Flash Memory (C3) * Data sheet will be in git

=== SRAM === * ESMT M24L2161128SA-70BE (128k x16, i.e. 256kByte) * Data sheet [http://www.esmt.com.tw/DB/manager/upload/M24L216128SA.pdf available from vendor]

=== 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 [http://www.sitronix.com.tw/sitronix/product.nsf/Doc/ST7558?OpenDocument Sitronix ST7558],
for which the data sheet is available. There is a community-based
[https://calypso.gnumonks.org/trac/browser/phone/motorola_compal/C115/example_project driver implemented in PIC16 assembly] (in our git repository. We need a proper
C language driver for it (any volunteers?)

=== Test Points ===

==== 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

==== 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)

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

• TP27 -- DLPWR (download power on), connects to Iota:RPWON
• TP14 -- RxD Modem
• TP13 -- TxD Modem
• TP9 -- CTS Modem
• TP39 -- GND