AT43USB325 datasheet(108/109 Pages) ATMEL

108 / 109 page

3355C–USB–4/05

AT43USB325

Timer/Counters ...................................................................................... 42

6.1Timer/Counter Prescaler .........................................................................................42

6.28-bit Timer/Counter0 ...............................................................................................43

6.316-bit Timer/Counter1 .............................................................................................45

6.416-bit Timer/Counter1 Operation .............................................................................46

6.5Watchdog Timer ......................................................................................................53

I/O Ports .................................................................................................. 55

7.1Port A ......................................................................................................................56

7.2Port B ......................................................................................................................57

7.3Port C ......................................................................................................................58

7.4Port D ......................................................................................................................59

7.5Port E ......................................................................................................................60

7.6Port F .......................................................................................................................61

Programming the USB Module ............................................................. 63

8.1USB Function ..........................................................................................................63

8.2USB Registers .........................................................................................................71

8.3Endpoint Registers ..................................................................................................72

8.4USB Hub .................................................................................................................81

8.5Suspend and Resume .............................................................................................92

Electrical Specification .......................................................................... 96

9.1Absolute Maximum Ratings .....................................................................................96

9.2DC Characteristics ..................................................................................................96

Ordering Information ........................................................................... 103

10.1Standard Package Options .................................................................................103

10.2Green Package Options (Pb/Halide-free/RoHS Compliant) ................................103

Packaging Information ........................................................................ 104

11.164AA – LQFP .....................................................................................................104

Errata Sheet .......................................................................................... 105

12.1Problem ...............................................................................................................105

12.2Fix/Workaround ...................................................................................................105

Change Log .......................................................................................... 106

Table of Contents....................................................................................... i

AT43USB325 Datasheet(PDF) 108 Page - ATMEL Corporation