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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TUSB6250 датащи(PDF) 95 Page - Texas Instruments |
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TUSB6250 датащи(HTML) 95 Page - Texas Instruments |
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95 / 124 page  ATA/ATAPI Interface Port 11−14 SLLS535A − January 2004 TUSB6250 The complete 32-bit transfer byte count (TRNS_BCN [31:0]) is stored in the USB or the ATA/ATAPI transfer byte count register 0−3. The initial TRNS_BCN [31:0] is used to indicate the expected total transfer byte count for a command, which is equal to the dCBWDataTransferLength defined by the USB mass storage bulk-only specification. After data is transferred through the USB or ATA/ATAPI interface, TRNS_BCN [31:0] is decremented accordingly. If the command is finished normally, the final TRNS_BCN [31:0] should become 0. For ATA PIO mode, the MCU should load TRNS_BCN [17:9] with the expected sector number. TRNS_BCN [17:9] is then copied to SEC_CNT [8:0] as the sector count initial value. 765 43210 TRNS_BCN7 TRNS_BCN6 TRNS_BCN5 TRNS_BCN4 TRNS_BCN3 TRNS_BCN2 TRNS_BCN1 TRNS_BCN0 R/W R/W R/W R/W R/W R/W R/W R/W BIT NAME RESET FUNCTION 0 TRNS_BCN [7:0] 00h Transfer byte count [7:0] value 11.5.8 TRANSBCNT1: USB or ATA/ATAPI Transfer Byte Count Register 1 (XDATA at F0D7) 76 5 432 10 TRNS_BCN15 TRNS_BCN14 TRNS_BCN13 TRNS_BCN12 TRNS_BCN11 TRNS_BCN10 TRNS_BCN9 TRNS_BCN8 R/W R/W R/W R/W R/W R/W R/W R/W BIT NAME RESET FUNCTION 0 TRNS_BCN [15:8] 00h Transfer byte count [15:8] value 11.5.9 TRANSBCNT2: USB or ATA/ATAPI Transfer Byte Count Register 2 (XDATA at F0D8) 76 5 432 10 TRNS_BCN23 TRNS_BCN22 TRNS_BCN21 TRNS_BCN20 TRNS_BCN19 TRNS_BCN18 TRNS_BCN17 TRNS_BCN16 R/W R/W R/W R/W R/W R/W R/W R/W BIT NAME RESET FUNCTION 0 TRNS_BCN [23:16] 00h Transfer byte count [23:16] value 11.5.10 TRANSBCNT3: USB or ATA/ATAPI Transfer Byte Count Register 3 (XDATA at F0D9) 76 5 432 10 TRNS_BCN31 TRNS_BCN30 TRNS_BCN29 TRNS_BCN28 TRNS_BCN27 TRNS_BCN26 TRNS_BCN25 TRNS_BCN24 R/W R/W R/W R/W R/W R/W R/W R/W BIT NAME RESET FUNCTION 0 TRNS_BCN [31:24] 00h Transfer byte count [31:24] value |
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