Teardown: Rio Carbon

MP3 player with miniature 5 GB (2.5GB to 6 GB?) HDD and lithium battery from 2004.
Quite difficult to open - lot of metal latches on back cover.
No HDD inside of this unit but rest of the hardware seems to be functional - might get carbonized.
Sigmatel STMP3550 SoC
K4S280832F: 16M x 8bit 133 MHz SDRAM - same part was used in PC 128 MB DIMMs
74LVC245: octal bus transceiver with direction pin with 5 V tolerant input/outputs (3-state)
Big lithium battery (20 hours of playback time!)
 512 kbit I2C EEPROM

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