STR720 datasheet(287/401 Pages) STMICROELECTRONICS

部件名	STR720

功能描述	ARM720T 16/32-BIT MCU WITH 16K RAM, USB, CAN, 3 TIMERS, ADC, 6 COMMUNICATIONS INTERFACES

PDF	401 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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287 / 401 page

STR720 - USB SLAVE INTERFACE (USB)

287/401

Bits 3:0

EP_ID[3:0]: Endpoint Identifier.

These bits are written by the hardware according to the endpoint number, which

generated the interrupt request. If several endpoint transactions are pending,

the hardware writes the endpoint identifier related to the endpoint having the

highest priority defined in the following way: Two endpoint sets are defined, in

order of priority: Isochronous and double-buffered bulk endpoints are

considered first and then the other endpoints are examined. If more than one

endpoint from the same set is requesting an interrupt, the EP_ID bits in

USB_ISTR register are assigned according to the lowest requesting endpoint

application software can assign a register to each endpoint according to this

priority scheme, so as to order the concurring endpoint requests in a suitable

way. These bits are read only.

STR720 数据表(PDF) 287 Page - STMicroelectronics