at85c51snd3b ATMEL Corporation, at85c51snd3b Datasheet - Page 160

• Manufacturer Part Number: at85c51snd3b
• Description: Single-chip Digital Audio Decoder - Encoder With Usb 2.0 Interface
• Manufacturer: ATMEL Corporation

160
AT85C51SND3B
Reset Value = 0000 0000b
Table 168. APSTA Register
APSTA (1.EAh) – Audio Processor Status Register
Reset Value = 0000 0000b
Table 169. APINT Register
APINT (1.F4h) – Audio Processor Interrupt Register
Reset Value = 0000 0000b
APSTAT7
Number
Number
Number
APGPI3
7-0
7-4
Bit
Bit
Bit
1
0
7
7
3
2
1
0
APSTAT7:0
Mnemonic Description
Mnemonic Description
Mnemonic Description
APGPI3:0
APSTAT6
APLOAD
APRDYI
APREQI
APGPI2
APEVTI
DAPEN
ACLIPI
Bit
Bit
Bit
6
6
Audio Processor Load Enable Bit
Set to enable audio processor codec code update.
Clear to disable audio processor codec code update.
Digital Audio Processor Enable Bit
Set to enable the digital audio processor.
Clear to disable the digital audio processor.
Audio Processor Status Byte
Codec firmware dependant.
Audio Processor General Purpose Interrupt Flag
Set by hardware to trigger a general purpose interrupt.
Cleared by hardware after writing APCON0.
Audio Processor Event Interrupt Flag
Set by hardware to signal an event from the audio processor.
Cleared by hardware after writing APCON0.
Audio Clipping Interrupt Flag
Set by hardware when audio gain (digital volume or bass boost) leads to
saturation.
Cleared by hardware after writing APCON0.
Audio Packet Ready Interrupt Flag
Set by hardware when audio buffer has at least one data packet ready to be read
(512 or 256 bytes depending on buffer configuration).
Cleared by hardware when audio buffer is empty.
Audio Packet Request Interrupt Flag
Set by hardware when audio buffer is able to receive one data packet (512 or
256 bytes depending on buffer configuration).
Cleared by hardware when audio buffer is full.
APSTAT5
APGPI1
5
5
APSTAT4
APGPI0
4
4
APSTAT3
APEVTI
3
3
APSTAT2
ACLIPI
2
2
APSTAT1
APRDYI
1
1
7632C–MP3–11/06
APSTAT0
APREQI
0
0