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AT83SND2CMP3 Scheda tecnica(PDF) 47 Page - ATMEL Corporation

Il numero della parte AT83SND2CMP3
Spiegazioni elettronici  Single-Chip MP3 Decoder with Full Audio Interface
PDF  97 Pages
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Produttore elettronici  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT83SND2CMP3 Scheda tecnica(HTML) 47 Page - ATMEL Corporation

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AT83SND2CMP3
7524B–MP3–05/06
Function Interface Unit (UFI)
The Function Interface Unit provides the interface between the AT83SND2CMP3 and
the SIE. It manages transactions at the packet level with minimal intervention from the
device firmware, which reads and writes the endpoint FIFOs.
Figure 33 shows typical USB IN and OUT transactions reporting the split in the hard-
ware (UFI) and software (C51) load.
Figure 32.
UFI Block Diagram
Figure 33.
USB Typical Transaction Load
To/From C51 Core
Endpoint Control
C51 side
Endpoint Control
USB side
Endpoint 2
Endpoint 1
Endpoint 0
USBCON
USBINT
USBIEN
UEPINT
UEPIEN
UEPNUM
UEPSTAX
USBADDR
UEPCONX
UEPDATX
UEPRST
UBYCTX
UFNUMH
UFNUML
Asynchronous Information
Transfer
Control
FSM
To/From SIE
12 MHz DPLL
OUT Transactions:
HOST
UFI
C51
OUT
DATA0 (n Bytes)
ACK
Endpoint FIFO read (n Bytes)
OUT
DATA1
NACK
OUT
DATA1
ACK
IN Transactions:
HOST
UFI
C51
IN
ACK
Endpoint FIFO Write
IN
DATA1
NACK
C51 interrupt
IN
DATA1
C51 interrupt
Endpoint FIFO write



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