Cowon iAudio 7 Info
Hardware Details
Comes in 4/8/16Gb models (Samsung NAND parts)
See it ripped apart here: http://www.imp3.net/articles/3/2007_09/14965_2.html
Download a recent firmware here: http://www.cowonglobal.com/download/Firmware/iaudio7/1_17/I7_FW_1.17.zip
Telechips TCC771L based, ARM946E-S core, with built-in 24-bit audio codec
Sanyo LV24020 tuner
PCF50606 chip (also found in iriver h300)
ATA2501 is used to drive sensor buttons
LW052A Dual 4-channel analog multiplexer/ demultiplexer (also found in iriver h300) http://www.rockbox.org/twiki/pub/Main/DataSheets/TexasInstrumentsLW052ADataSheet.pdf
160x128 TFT LCD at a claimed 18bit depth. Appears to be the Renesas HD66789R, as used in iriver h300 and other Rockbox-supported devices.
NAND flash - Samsung K9HBG08U1M (4GB model), K9HCG08U1M (8GB model)
SDRAM - K4M28163PH
Firmware format
The iAudio7 uses the standard Telechips firmware format - see TelechipsInfo
GPIO ports
GPIOA
| GPIOA0 |
Asserted when USB is inserted |
| GPIOA1 |
Cleared when hold switch is enabled |
| GPIOA2 |
Cleared when On/Off pressed |
| GPIOA4 |
Unknown used as output |
| GPIOA5 |
Seems to be connected to LV24020 data clock |
| GPIOA6 |
Seems to be connected to LV24020 data I/O |
| GPIOA7 |
Seems to be connected to LV24020 data NR_W |
| GPIOA10 |
Used by LCD control interface |
| GPIOA15 |
May be LCD reset? |
GPIOB
| GPIOB10 |
i2c data (SDA) |
| GPIOB11 |
i2c clock (SCL |
GPIOD
| GPIOD0 |
Switch between codec and FM-radio. Connected to A pin of LW052A |
| GPIOD1 |
LCD backlight on |
GPIOE
| GPIOE3 |
Speaker |
| GPIOE7 |
Connected to touch-panel connector |
| GPIOE8 |
Connected to touch-panel connector |
ADCs
- ADC0 provides an indication of the keypad state for the 'M', '-' and '+' buttons.
Audio
TCC771L has built-in 24-bit stereo audio codec. It's connected to CPU with I2C and has address 0x34 and accepts only writes. That seems to be one of the wolfson wm8731.
LW052A is used to switch between radio and audio. Radio seems to be connected to 1Y0, 2Y0. That means codec is connected to 1Y1, 2Y1 as B pin is always low, and GPIOD0 is connected to A. INH pin is grounded.
USB Boot Mode
The iAudio7 has a USB boot mode, you can enter it by holding down the 'mode' button while plugging in the USB connector. The Vendor/Product id changes to a TCC specific pair (Vendor=140e ProdID=b021), it is then possible to upload code to the device via tcctool (source available in svn tree: http://svn.rockbox.org/viewvc.cgi/trunk/utils/tcctool/ ).
Flashing
The OF does the flashing, so a bad flash will ruin the player until we figure out how to do the USB boot mode properly.
CategoryFrontpage: Cowon iAudio 7 Port Index [New Ports]
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