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SonyEricssonJ100i » History » Version 6

steve-m, 02/19/2016 10:49 PM

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[[PageOutline]]
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= Sony Ericsson J100i =
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The J100i seems to be one of many ODM phones that Sony Ericsson bought from Compal communications in Taiwan.
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== Specifications ==
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 * GSM 900 / GSM 1800 dual-band (J100i)
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 * GSM 850 / GSM 1900 dual-band (J100a)
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 * 100 x 44 x 18 mm, 79g
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 * STN 65k - 96 x 64 pixels
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 * 900mAh Li-Po battery
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 * Ti Calypso/Iota/Rita chipset 
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== Hardware ==
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[[Image(se_j100_pcb.jpg, 33%)]]
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=== Schematics ===
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They can be found here: http://files.shrak-mobile.com/schem/se/J100_schem.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 TWL3025BZ
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 * RF: Ti TRF 6151CJ
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 * RF PA: SKY77328-13
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=== NOR Flash + SRAM ===
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 * Intel RD38F1010C0ZTL0
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  * 32MBit NOR (4 MByte)
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  * 4Mbit SRAM (512 KByte) 
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=== Audio ringtone ===
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 * Macronix MX92U832AZCG (unknown datasheet)
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=== Display ===
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The display is a 96 x 64 pixels CSTN color display attached to the Calypso DBB via the uWire interface (nReset, nSCS0, SCK, SDO). The backlight is controlled by the DBB IO1.
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Exact model unknown for now.
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=== Test points ===
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There are some easily accessible test points (i.e. bigsqare and not very small round pads behind the rf shields).
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Theses test points are divided in two groups (when looking from behind the phone) :
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 * A group of 7 TPs at the lower left of the PCB. Accessible from the battery compartment without disassembly except for the first one. From left to right :
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  * '''TP16''': JTAG TDO
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  * '''TP9''': CTS MODEM
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  * '''TP13''': TX MODEM
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  * '''TP14''': RX MODEM
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  * '''TP3''': DL PWR
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  * '''TP107''': GND
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  * '''TP19''': VBAT
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 * A group of 5 TPs at the middle/upper right of the PCB. Theses are not accessible without disassembly, but could be by cutting a small plastic strip just right of the hole made for the battery connector. From left to right:
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  * '''TP18''': JTAG TMS
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  * '''TP20''': BAT_TEMP
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  * '''TP17''': JTAG TCK
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  * '''TP15''': VCHG
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  * '''TP8''': JTAG TDI
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== Misc notes ==
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=== Bootloader ===
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The RAM loader of the J100i is the same as used on the [wiki:MotorolaC140] series and it works fine with osmocon. It however expects a "1003" magic word to be present at address 0x803ce0.
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[[BR]]Use the osmoload model-switch "-m c140/c140xor" and upload the [wiki:Bootloader], and upload the application with osmoload (e.g. layer1.osmoload.bin)
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