Rainbow-electronics AT89C5122 Bedienungsanleitung PDF herunterladen (Seite 97)

AT8xC5122/23

4202E–SCR–06/06

Figure 50. SIE Block Diagram

Function Interface Unit (UFI) The Function Interface Unit provides the interface between the AT8xC5122D (or

AT83C5123) and the SIE. It manages transactions at the packet level with minimal inter-

vention from the device firmware, which reads and writes the endpoint FIFOs.

Figure 51. UFI Block Diagram

End of Packet

Detection

Start of Packet

Detection

D+

D-

Clock

Recovery

SYNC detection

PID decoder

Address Decoder

Serial to Parallel

Conversion

CRC5 & CRC16

Generation/Check

USB Pattern Generator

Parallel to Serial Converter

Bit Stuffing

NRZI Converter

CRC16 Generator

NRZI ‘ NRZ

Bit Unstuffing

Packet bit counter

Clk48

(48 MHz)

SysClk

(12 MHz)

DataIn [7:0]

DataOut

Transfer

Control

FSM

DPR Control

USB side

CSREG 0 to 7

Registers

Bank

DPR Control

mP side

UFI

User DPRAM

Up to 48 MHz

UC_SYSCLK

C51

Microcontrolle

Interface

Asynchronous Information

Transfer

Endpoint 0

Endpoint 1

Endpoint 2

Endpoint 3

SIE

DPLL

Endpoint 4

Endpoint 5

Endpoint 6

1 2 ... 92 93 94 95 96 97 98 99 100 101 102 ... 212 213

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