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.

• AS3514_Features.pdf: AS3514 Features (PDF), including a block diagram - from the AustriaMicrosystems web site

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