AT43USB325_05 Datasheet, PDF (108/109 Pages) ATMEL Corporation – Multimedia USB Keyboard Controller with Embedded Hub

6 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
7 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
8 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
9 Electrical Specification .......................................................................... 96
9.1Absolute Maximum Ratings .....................................................................................96
9.2DC Characteristics ..................................................................................................96
10 Ordering Information ........................................................................... 103
10.1Standard Package Options .................................................................................103
10.2Green Package Options (Pb/Halide-free/RoHS Compliant) ................................103
11 Packaging Information ........................................................................ 104
11.164AA – LQFP .....................................................................................................104
12 Errata Sheet .......................................................................................... 105
12.1Problem ...............................................................................................................105
12.2Fix/Workaround ...................................................................................................105
13 Change Log .......................................................................................... 106
Table of Contents....................................................................................... i
ii AT43USB325
3355C–USB–4/05