Atmel AT85DVK-07 Especificaciones descargar pdf (Pagina 87)

AT85C51SND3Bx

7632A–MP3–03/06

• The DPACC bit and the DPADD10:0 field can be set by software. The DPRAM is not

cleared.

• The SPDCONF bits can be set by software.

After setting USBE, the USB Controller enters in the Host or in the Device state (accord-

ing to the UID pin level). The selected controller is ‘Idle’.

The USB Controller can at any time be ‘stopped’ by clearing USBE. In fact, clearing

USBE acts as an hardware reset.

Interrupts As shown in Figure 52, the USB controller implements five main global interrupt

sources: the USB general and OTG interrupts detailed in Figure 53, the USB device and

endpoint interrupts detailed in Section “Interrupts”, page 113, and the USB host and

pipe interrupts detailed in Section “Interrupt”, page 134.

Figure 52. USB Interrupt System

Figure 53. USB General and OTG Interrupt System

USB Controller

Interrupt Request

USB General

& OTG Interrupt

USB Device

Interrupt

Endpoint

Interrupt

USB Host

Interrupt

Pipe

Interrupt

EUSB

IEN1.0

VBUSTI

USBINT.0

VBUSTE

USBCON.0

BCERRI

OTGINT.2

BCERRE

OTGIEN.2

ROLEEXI

OTGINT.3

ROLEEXE

OTGIEN.3

STOI

OTGINT.5

STOE

OTGIEN.5

IDTI

USBINT.1

IDTE

USBCON.1

VBERRI

OTGINT.1

VBERRE

OTGIEN.1

SRPI

OTGINT.0

SRPE

OTGIEN.0

HNPERRI

OTGINT.4

HNPERRE

OTGIEN.4

USB General

& OTG Interrupt

1 2 ... 82 83 84 85 86 87 88 89 90 91 92 ... 262 263

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