at89c5131 ATMEL Corporation, at89c5131 Datasheet - Page 118

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at89c5131

Manufacturer Part Number
at89c5131
Description
8-bit Flash Microcontroller With Full Speed Usb Device At89c5131
Manufacturer
ATMEL Corporation
Datasheet

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Serial Interface Engine (SIE)
Figure 54. SIE Block Diagram
116
D+
D-
AT89C5131
End of Packet
Detection
Start of Packet
Detection
Clk48
(48 MHz)
The SIE performs the following functions:
Clock
Recovery
NRZI data encoding and decoding.
Bit stuffing and un-stuffing.
CRC generation and checking.
Handshakes.
TOKEN type identifying.
Address checking.
Clock generation (via DPLL).
NRZI ‘NRZ
Bit Un-stuffing
Packet Bit Counter
USB Pattern Generator
Parallel to Serial Converter
Bit Stuffing
NRZI Converter
CRC16 Generator
SysClk
(12 MHz)
8
SYNC Detection
PID Decoder
Address Decoder
Serial to
Parallel Conversion
CRC5 and CRC16
Generation/Check
DataIn [7:0]
DataOut
8
4136C–USB–04/05

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