AT89C5131-PLTIL ATMEL Corporation, AT89C5131-PLTIL Datasheet - Page 116

• Manufacturer Part Number: AT89C5131-PLTIL
• Description: 8-bit Flash Microcontroller with Full Speed USB Device
• Manufacturer: ATMEL Corporation

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
4136B–USB–09/03