AT90USB646 datasheet(256/434 Pages) ATMEL

256 / 434 page

256

7593A–AVR–02/06

AT90USB64/128

Figure 21-13. USB General and OTG Controller Interrupt System

There are 2 kind of interrupts: processing (i.e. their generation are part of the normal processing)

and exception (errors).

Processing interrupts are generated when:

• ID Pad detection (insert, remove)(

IDTI)

• VBUS plug-in detection (insert, remove) (

VBUSTI)

• SRP detected(

SRPI)

• Role Exchanged(

ROLEEXI)

Exception Interrupts are generated when:

• Drop on VBus Detected(

VBERRI)

• Error during the B-Connection(

BCERRI)

• HNP Error(

HNPERRI)

• Time-out detected during Suspend mode(

STOII)

21.5 Power modes

21.5.1

Idle mode

In this mode, the CPU core is halted (CPU clock stopped). The Idle mode is taken whatever the

USB controller is running or not. The CPU “wakes up” on any USB interrupts.

21.5.2

Power down

In this mode, the oscillator is stopped and halts all the product (CPU and peripherals). The CPU

“wakes up” when:

• the WAKEUPI interrupt is triggered in the Peripheral mode (HOST cleared),

IDTE

USBCON.1

IDTI

USBINT.1

VBUSTI

USBINT.0

VBUSTE

USBCON.0

STOI

OTGINT.5

STOE

OTGIEN.5

HNPERRI

OTGINT.4

HNPERRE

OTGIEN.4

ROLEEXI

OTGINT.3

ROLEEXE

OTGIEN.3

BCERRI

OTGINT.2

BCERRE

OTGIEN.2

VBERRI

OTGINT.1

VBERRE

OTGIEN.1

SRPI

OTGINT.0

SRPE

OTGIEN.0

USB General & OTG

Interrupt Vector

Asynchronous Interrupt source

(allows the CPU to wake up from power down mode)

AT90USB646 Datasheet(PDF) 256 Page - ATMEL Corporation

AT90USB646 Datasheet(HTML) 256 Page - ATMEL Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL