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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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AT89C5122DS-RDRUM 데이터시트(PDF) 95 Page - ATMEL Corporation |
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AT89C5122DS-RDRUM 데이터시트(HTML) 95 Page - ATMEL Corporation |
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95 / 208 page  95 AT83R5122, AT8xC5122/23 4202F–SCR–07/2008 Figure 49. 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 50. 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 8 8 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 Microcontroller Interface Asynchronous Information Transfer Endpoint 0 Endpoint 1 Endpoint 2 Endpoint 3 SIE DPLL Endpoint 4 Endpoint 5 Endpoint 6 |
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