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Wiki > Main > AustriaMicrosystems > AustriaMicrosystemsAS3514

AustriaMicrosystems AS3514

Description

The AS3514 from AustriaMicrosystems is a stereo audio codec with included system power management features. It is thought to provide the codec and power management features in the PortalPlayer PP5024 SOC.

Register Addresses

The following register/function addresses are known for the AS3514. Each address contains a single byte. Data repeats every 0x40 (64) bytes, so for example reading address 0x43 results in the same data as reading address 0x03.

Address Function
0x20 Power control. Bit 0 controls system power.
0x23 Backlight brightness in the range 0-12. 0 is off, 12 is max brightness.
0x25 Unknown. Switches from 0x00 to 0x20 as USB/charger cable is attached.
0x27 Unknown. Toggles between 0 and 1 every 1/4th second.
0x2a Real Time Clock byte 1. 32-bit little endian number counting seconds since 1-Jan-1980.
0x2b Real Time Clock byte 2. 32-bit little endian number counting seconds since 1-Jan-1980.
0x2c Real Time Clock byte 3. 32-bit little endian number counting seconds since 1-Jan-1980.
0x2d Real Time Clock byte 4. 32-bit little endian number counting seconds since 1-Jan-1980.
0x2e MSB of 10-bit Battery level. Read two bytes and combine to a 10-bit value to get battery level.
0x2f LSB of 10-bit Battery level.

Map of values in my Sansa e260 (in hex) -- BertrikSikken - 22 Oct 2007
Address x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 xA xB xC xD xE xF
0x 00 00 CD 4D 00 00 00 00 00 00 00 00 00 00 16 56
1x 00 00 00 00 60 38 05 05 05 05 05 05 05 00 00 00
2x 21 08 00 06 05 00 10 0x 23 40 xx xx xx xx 02 E8
3x 00 00 00 00 00 00 00 00 A4 B4 32 35 08 F2 12 FD
where xx is a value that changes

The 16 bytes at 0x30 appear to be the USB (UMS) iSerial descriptor. For the Sansa matching the above dump, the serial number is:

00000000-00000000-3532b4a4-fd12f208-0000000
r9 - 11 Feb 2008 - 21:00:13 - DaveChapman
Copyright by the contributing authors.