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AT89C5131A-RDTUM Datasheet(PDF) 121 Page - ATMEL Corporation |
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AT89C5131A-RDTUM Datasheet(HTML) 121 Page - ATMEL Corporation |
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121 / 188 page  121 4337K–USB–04/08 AT89C5130A/31A-M • Address checking. • Clock generation (via DPLL). Figure 21-2. SIE Block Diagram 21.1.2 Function Interface Unit (FIU) The Function Interface Unit provides the interface between the AT89C5131 and the SIE. It man- ages transactions at the packet level with minimal intervention from the device firmware, which reads and writes the endpoint FIFOs. End of Packet Detection Start of Packet Detection D+ D- Clock Recovery SYNC Detection PID Decoder Address Decoder Serial to P a r a l l e l CRC5 and CRC16 Generation/Check USB Pattern Generator Parallel to Serial Converter Bit Stuffing NRZI Converter CRC16 Generator NRZI ‘NRZ Bit Un-stuffing Packet Bit Counter Clk48 (48 MHz) SysClk (12 MHz) DataIn [7:0] DataOut 8 8 |
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