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AT89C5131A-RDTIL 数据表(PDF) 140 Page - ATMEL Corporation |
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AT89C5131A-RDTIL 数据表(HTML) 140 Page - ATMEL Corporation |
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140 / 186 page  140 AT89C5131A-L 4338F–USB–08/07 Table 97. UEPCONX Register UEPCONX (S:D4h) USB Endpoint X Control Register Note: 1. (X = EPNUM set in UEPNUM Register UEPNUM (S:C7h) USB Endpoint Number) Reset Value = 80h when UEPNUM = 0 (default Control Endpoint) Reset Value = 00h otherwise for all other endpoints 7 6 5 4 3 2 1 0 EPEN - - - DTGL EPDIR EPTYPE1 EPTYPE0 Bit Number Bit Mnemonic Description 7 EPEN Endpoint Enable Set this bit to enable the endpoint according to the device configuration. Endpoint 0 will always be enabled after a hardware or USB bus reset and participate in the device configuration. Clear this bit to disable the endpoint according to the device configuration. 6 - Reserved The value read from this bit is always 0. Do not set this bit. 5 - Reserved The value read from this bit is always 0. Do not set this bit. 4 - Reserved The value read from this bit is always 0. Do not set this bit. 3 DTGL Data Toggle (Read-only) This bit is set by hardware when a valid DATA0 packet is received and accepted. This bit is cleared by hardware when a valid DATA1 packet is received and accepted. 2 EPDIR Endpoint Direction Set this bit to configure IN direction for Bulk, Interrupt and Isochronous endpoints. Clear this bit to configure OUT direction for Bulk, Interrupt and Isochronous endpoints. This bit has no effect for Control endpoints. 1-0 EPTYPE[1:0] Endpoint Type Set this field according to the endpoint configuration (Endpoint 0 will always be configured as control): 00Control endpoint 01Isochronous endpoint 10Bulk endpoint 11Interrupt endpoint |
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