eLinux.org - Embedded Linux Wiki

From eLinux.org

Discussion

• #edev on irc.freenode.net
• didj homebrew forum
• How to extract files from the firmware .exe
• Initial Memory Map Dump
• Cozybit boasts of their involvment in integrating Linux with the Didj
• the #edev guys located THIS on the leapfrog site
  • Didj Linux and root filesystem source is here
  • busybox isn't listed
• linux kernel source is now available from LeapFrog
• Adding Serial Console

Chip List

processor info

• BGA package
• 288 pins
• .65mm pitch
• 15x15mm
• has onboard usb device
• 12mhz xtal
• 27mhz xtal (suspect it is for the audio interface)
• unknown barrel xtal(suspect it is rtc)
• ARM926EJ-S
• possible JTAG on pads

* TP8 - Vcc
* TP9
* TP10
* TP11
* TP12
* TP13
* TP14 - Vss

• marked with "LF-1000"
• marked with "ARM"
• marked with "N12N1D"
• marked with "H0815"
• onboard tft controller
• onboard i2s or ac97 interface
• 393MHz

after some careful research and elimination, it appears that the processor might be a variation of the STn8811 or STn8815 from ST which now is a working with NXP as ST-NXP Wirless. the bga packaging and layout of the pins appear to be very very similiar. in addition, the STn8811 and STn8815 are the only commercially announced ARM926EJ-S that operates ate 393MHz. i've also found a company called SOCLE that has some IP arm926 cores available at up to 500MHz. since the LF-1000 is custom marked for leapfrog, SOCLE's custom devices might be what's inside. CMPU491A SoC

1 Micron MT29F2G08AAC - 256megabyte nand flash 8-bit datasheet

1 Cirrus Logic CS43L22 - audio codec datasheet

1 QImonda HYB25DC25616OCE-5 - 32megabyte sdram datasheet

1 Giantplus GPM758A0 - 320x240 tft website

1 Intersil ISL7665SACBAZ - Programmable Over/Under Voltage Detector datasheet

3 TI TPS62050 - Adjustable Step-Down Converter datasheet