ATmega32U2 datasheet(208/314 Pages) ATMEL

Il numero della parte	ATmega32U2

Spiegazioni elettronici	8-bit Microcontroller with 8/16/32K Bytes of ISP Flash and USB Controller

PDF	314 Pages

Scroll/Zoom	100%

Produttore elettronici	ATMEL [ATMEL Corporation]

Homepage	http://www.atmel.com

Logo

208 / 314 page

208

7799B–AVR–07/09

ATmega8U2/16U2/32U2

It is not possible to have overflow error during IN stage, in the CPU side, since the CPU should

write only if the bank is ready to access data (TXINI=1 or RWAL=1).

21.17 Interrupts

The next figure shows all the interrupts sources:

Figure 21-4. USB Device 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:

• Upstream resume(

UPRSMI)

• End of resume(

EORSMI)

• Wake up(

WAKEUPI)

• End of reset (Speed Initialization)(

EORSTI)

• Start of frame(

SOFI, if FNCERR=0)

• Suspend detected after 3 ms of inactivity(

SUSPI)

Exception Interrupts are generated when:

• CRC error in frame number of SOF(

SOFI, FNCERR=1)

UPRSMI

UDINT.6

UPRSME

UDIEN.6

EORSMI

UDINT.5

EORSME

UDIEN.5

WAKEUPI

UDINT.4

WAKEUPE

UDIEN.4

EORSTI

UDINT.3

EORSTE

UDIEN.3

SOFI

UDINT.2

SOFE

UDIEN.2

SUSPI

UDINT.0

SUSPE

UDIEN.0

USB Device

Interrupt

ATmega32U2 Scheda tecnica(PDF) 208 Page - ATMEL Corporation

ATmega32U2 Scheda tecnica(HTML) 208 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

Scheda tecnica Scarica

Link URL