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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AT89C5131A-RDTIM датащи(PDF) 121 Page - ATMEL Corporation |
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AT89C5131A-RDTIM датащи(HTML) 121 Page - ATMEL Corporation |
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121 / 184 page  121 AT89C5130A/31A-M 4337C–USB–02/05 • Endpoint enable Before using an endpoint, this one will be enabled by setting the EPEN bit in the UEPCONX register. An endpoint which is not enabled won’t answer to any USB request. The Default Control Endpoint (Endpoint 0) will always be enabled in order to answer to USB standard requests. • Endpoint type configuration All Standard Endpoints can be configured in Control, Bulk, Interrupt or Isochronous mode. The Ping-pong Endpoints can be configured in Bulk, Interrupt or Isochronous mode. The configuration of an endpoint is performed by setting the field EPTYPE with the following values: – Control:EPTYPE = 00b – Isochronous:EPTYPE = 01b – Bulk:EPTYPE = 10b – Interrupt:EPTYPE = 11b The Endpoint 0 is the Default Control Endpoint and will always be configured in Control type. • Endpoint direction configuration For Bulk, Interrupt and Isochronous endpoints, the direction is defined with the EPDIR bit of the UEPCONX register with the following values: – IN:EPDIR = 1b –OUT:EPDIR = 0b For Control endpoints, the EPDIR bit has no effect. • Summary of Endpoint Configuration: Do not forget to select the correct endpoint number in the UEPNUM register before accessing to endpoint specific registers. Table 92. Summary of Endpoint Configuration Endpoint Configuration EPEN EPDIR EPTYPE UEPCONX Disabled 0b Xb XXb 0XXX XXXb Control 1b Xb 00b 80h Bulk-in 1b 1b 10b 86h Bulk-out 1b 0b 10b 82h Interrupt-In 1b 1b 11b 87h Interrupt-Out 1b 0b 11b 83h Isochronous-In 1b 1b 01b 85h Isochronous-Out 1b 0b 01b 81h |
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