AT90USB646 datasheet(292/456 Pages) ATMEL

292 / 456 page

292

7593L–AVR–09/12

AT90USB64/128

Figure 24-7. USB device controller pipe interrupt system.

24.16 Registers

24.16.1

General USB host registers

• 7-3 - Reserved

The value read from these bits is always 0. Do not set these bits.

• 2 - RESUME - Send USB Resume

Set this bit to generate a USB Resume on the USB bus.

Cleared by hardware when the USB Resume has been sent. Clearing by software has no effect.

This bit should be set only when the start of frame generation is enable (SOFEN bit set).

• 1 - RESET - Send USB Reset

Set this bit to generate a USB Reset on the USB bus.

Cleared by hardware when the USB Reset has been sent. Clearing by software has no effect.

Refer to the USB reset section for more details.

• 0 - SOFEN - Start Of Frame Generation Enable

Set this bit to generate SOF on the USB bus in full speed mode and keep-alive in low speed

mode.

Clear this bit to disable the SOF generation and to leave the USB bus in Idle state.

FLERRE

UPIEN.7

UNDERFI

UPSTAX.5

OVERFI

UPSTAX.6

NAKEDI

UPINTX.6

NAKEDE

UPIEN.6

PERRI

UPINTX.4

PERRE

UPIEN.4

TXSTPI

UPINTX.3

TXSTPE

UPIEN.3

TXOUTI

UPINTX.2

TXOUTE

UPIEN.2

RXSTALLI

UPINTX.1

RXSTALLE

UPIEN.1

RXINI

UPINTX.0

RXINE

UPIEN.0

FLERRE

UPIEN.7

PIPE 0

PIPE 1

PIPE 2

PIPE 3

PIPE 4

PIPE 5

Pipe interrupt

PIPE 6

Bit

6543

----

RESUME

RESET

SOFEN

UHCON

Read/write

RRRRR

R/W

Initial value

0000

AT90USB646 Datasheet(PDF) 292 Page - ATMEL Corporation

AT90USB646 Datasheet(HTML) 292 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