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Wiki > Main > CowonIaudio7Info

---+!! Cowon iAudio 7 Info

%TOC%

---++ Hardware Details

Comes in 2/4/8/16Gb 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 http://www.thrman.com/technology/PDF/ATA2501_Application_Guide.pdf

!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

---++ Port Status
%RED%NOTE: Port is not ready for everyday use%ENDCOLOR%
   * LCD working
   * Buttons working, ata2501 needs improvement
   * NAND flash has problems, see CowonD2Info, TelechipsNAND
   * Audio has problems with delayed playback, seems that codec starts too slow (prepare_insert(), LOW_DATA), see CowonD2Info
   * Recording not yet implemented due to problems with TelechipsNAND
   * FM-radio working, not really tested, but there is playback
   * Battery ADC channel isn't discovered yet, probably it's one of pcf50606 channels
   * USB not yet working, but there is some on-going work
   * Keymaps should be improved

---++ 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|
|GPIOD4|ATA2501 SDATA?|
|GPIOD5|ATA2501 STB?|
|GPIOD6|ATA2501 reset|
|GPIOD7|ATA2501 SFIMD|
|GPIOD8|Connected to touch-panel connector|
|GPIOD9|Connected to touch-panel connector|

---+++!! GPIOE
|GPIOE3|Speaker|

---++ 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]

I	Attachment	Action	Size	Date	Who	Comment
jpg	bottom.jpg	manage	222.5 K	10 Aug 2008 - 07:35	VitjaMakarov	Board bottom
jpg	top.jpg	manage	186.8 K	10 Aug 2008 - 07:34	VitjaMakarov	Board top
jpg	touch-panel.jpg	manage	212.0 K	10 Aug 2008 - 07:34	VitjaMakarov	Touch-buttons panel

r18 - 04 Dec 2008 - 16:41:52 - RobertMenes