AT83C51SND1C_03 ATMEL [ATMEL Corporation], AT83C51SND1C_03 Datasheet - Page 82

• Manufacturer Part Number: AT83C51SND1C_03
• Description: Single-Chip Flash Microcontroller with MP3 Decoder and Human Interface
• Manufacturer: ATMEL [ATMEL Corporation]

Serial Interface Engine (SIE)
Figure 57. SIE Block Diagram
82
AT8xC51SND1C
D+
D-
CLOCK
USB
Start of Packet
End of Packet
Detector
Detector
The SIE performs the following functions:
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48 MHz
NRZI data encoding and decoding.
Bit stuffing and unstuffing.
CRC generation and checking.
ACKs and NACKs automatic generation.
TOKEN type identifying.
Address checking.
Clock recovery (using DPLL).
Recover
Clock
Packet Bit Counter
Parallel to Serial Converter
Bit Unstuffing
USB Pattern Generator
NRZI ‘ NRZ
CRC16 Generator
NRZI Converter
Bit Stuffing
SysClk
(12 MHz)
Address Decoder
Serial to Parallel
SYNC Detector
Generator/Check
CRC5 & CRC16
PID Decoder
8
Converter
Data In
8
Data Out
4109E–8051–06/03