AT90USB646 datasheet(274/456 Pages) ATMEL

274 / 456 page

274

7593L–AVR–09/12

AT90USB64/128

• 7-3 - Reserved

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

• 2 - LSM - USB Device Low Speed Mode selection

When configured USB is configured in device mode, this bit allows to select the USB the USB

Low Speed or Full Speed Mod.

Clear to select full speed mode (D+ internal pull-up will be activate with the ATTACH bit will be

set) .

Set to select low speed mode (D- internal pull-up will be activate with the ATTACH bit will be

set). This bit has no effect when the USB interface is configured in HOST mode.

• 1- RMWKUP - Remote Wake-up bit

Set to send an “upstream-resume” to the host for a remote wake-up (the SUSPI bit must be set).

Cleared by hardware when signalling finished. Clearing by software has no effect.

See Section 23.10, page 266 for more details.

• 0 - DETACH - Detach bit

Set to physically detach de device (disconnect internal pull-up on D+ or D-).

Clear to reconnect the device. See Section 23.9, page 265 for more details.

• 7 - Reserved

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

• 6 - UPRSMI - Upstream Resume Interrupt flag

Set by hardware when the USB controller is sending a resume signal called “Upstream

Resume”. This triggers an USB interrupt if UPRSME is set.

Shall be cleared by software (USB clocks must be enabled before). Setting by software has no

effect.

• 5 - EORSMI - End Of Resume Interrupt flag

Set by hardware when the USB controller detects a good “End Of Resume” signal initiated by

the host. This triggers an USB interrupt if EORSME is set.

Shall be cleared by software. Setting by software has no effect.

• 4 - WAKEUPI - Wake-up CPU Interrupt flag

Set by hardware when the USB controller is re-activated by a filtered non-idle signal from the

lines (not by an upstream resume). This triggers an interrupt if WAKEUPE is set. This interrupt

should be enable only to wake up the CPU core from power down mode.

Shall be cleared by software (USB clock inputs must be enabled before). Setting by software

has no effect.

See Section 23.8, page 265 for more details.

Bit

65432

UPRSMI

EORSMI

WAKEUPI

EORSTI

SOFI

SUSPI

UDINT

Read/write

Initial value

00000

AT90USB646 Datasheet(PDF) 274 Page - ATMEL Corporation

AT90USB646 Datasheet(HTML) 274 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