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AT43USB326 датащи(PDF) 57 Page - ATMEL Corporation |
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AT43USB326 датащи(HTML) 57 Page - ATMEL Corporation |
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57 / 102 page ![]() 57 AT43USB326 3313D–USB–04/06 Hub Endpoint 0 Byte Count Register – HBYTE_CNT0 Function Endpoint 0..2 Byte Count Register – FBYTE_CNT0..2 The contents of these registers stores the number of bytes to be sent or that was received by USB Hub and Function endpoints. This count includes the 16-bit CRC. To get the actual byte count of the data, subtract the count in the register by 2. The maximum byte count supported by the AT43USB326 is 8 bytes. Hub endpoint 1 has no byte count register. • Bit 7..6 – Reserved These bits are reserved in the AT43USB326 and will read as zero. • Bit 5..0 – BYTCT5..0: Byte Count – Length of Endpoint Data Packet Bit 7 6 543 2 1 0 Hub EP0 $1FCF – – BYTCT5 BYTCT4 BYTCT3 BYTCT2 BYTCT1 BYTCT0 HBYTE_CNT0 Function EP0 $1FCD – – BYTCT5 BYTCT4 BYTCT3 BYTCT2 BYTCT1 BYTCT0 FBYTE_CNT0 Function EP1 $1FCC – – BYTCT5 BYTCT4 BYTCT3 BYTCT2 BYTCT1 BYTCT0 FBYTE_CNT1 Function EP2 $1FCB – – BYTCT5 BYTCT4 BYTCT3 BYTCT2 BYTCT1 BYTCT0 FBYTE_CNT2 Read/Write R R R R/W R/W R/W R/W R/W Initial Value 0 0 0 0 0 0 0 0 |
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