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AT83SND1CXXX-ROTIL Scheda tecnica(PDF) 86 Page - ATMEL Corporation

Il numero della parte AT83SND1CXXX-ROTIL
Spiegazioni elettronici  Single-Chip Flash Microcontroller with MP3 Decoder and Human Interface
PDF  212 Pages
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Produttore elettronici  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT83SND1CXXX-ROTIL Scheda tecnica(HTML) 86 Page - ATMEL Corporation

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86
4109J–8051–10/06
AT8xC51SND1C
Warning 1: The Byte counter is not updated.
Warning 2: Do not write more Bytes than supported by the corresponding endpoint.
14.3.3
FIFO Mapping
Figure 14-8. Endpoint FIFO Configuration
14.4
Bulk/Interrupt Transactions
Bulk and Interrupt transactions are managed in the same way.
14.4.1
Bulk/Interrupt OUT Transactions in Standard Mode
Figure 14-9. Bulk/Interrupt OUT transactions in Standard Mode
An endpoint should be first enabled and configured before being able to receive Bulk or Interrupt
packets.
When a valid OUT packet is received on an endpoint, the RXOUTB0 bit is set by the USB con-
troller. This triggers an interrupt if enabled. The firmware has to select the corresponding
endpoint, store the number of data Bytes by reading the UBYCTX register. If the received packet
UEPNUM
Endpoint 0
Endpoint 2
UEPSTA0
UEPCON0
UEPDAT0
UEPSTA2
UEPCON2
UEPDAT2
0
1
2
SFR Registers
UEPSTAX
UEPCONX
UEPDATX
X
UBYCT0
UBYCT2
UBYCTX
OUT
DATA0 (n Bytes)
ACK
HOST
UFI
C51
Endpoint FIFO Read Byte 1
OUT
DATA1
NAK
RXOUTB0
Endpoint FIFO Read Byte 2
Endpoint FIFO Read Byte n
Clear RXOUTB0
OUT
DATA1
NAK
OUT
DATA1
ACK
RXOUTB0
Endpoint FIFO Read Byte 1



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