
iii
8052B–AVR–09/08
ATmega4HVD/8HVD
14.4Register Description ..............................................................................................70
15 Timer/Counter0 and Timer/Counter1 Prescalers ................................ 71
15.1Overview ................................................................................................................71
15.2Internal Clock Source ............................................................................................71
15.3Prescaler Reset .....................................................................................................71
15.4External Clock Source ...........................................................................................72
15.5Register Description ..............................................................................................72
16 Timer/Counter(T/C0,T/C1) ...................................................................... 74
16.1Features ................................................................................................................74
16.2Overview ................................................................................................................74
16.3Timer/Counter Clock Sources ...............................................................................75
16.4Counter Unit ..........................................................................................................75
16.5Modes of Operation ...............................................................................................76
16.6Input Capture Unit .................................................................................................78
16.7Output Compare Unit .............................................................................................80
16.8Timer/Counter Timing Diagrams ...........................................................................81
16.9Accessing Registers in 16-bit Mode ......................................................................82
16.10Register Description ............................................................................................86
17 ADC - Analog-to-Digital Converter ....................................................... 90
17.1Features ................................................................................................................90
17.2Operation ...............................................................................................................91
17.3Starting a Conversion ............................................................................................91
17.4Conversion Timing .................................................................................................91
17.5ADC Voltage Reference ........................................................................................92
17.6ADC Noise Canceler .............................................................................................92
17.7ADC Conversion Result .........................................................................................96
17.8Register Description ..............................................................................................97
18 Voltage Reference .................................................................................. 99
19 Voltage Regulator ................................................................................ 100
19.1Features ..............................................................................................................100
19.2Overview ..............................................................................................................100
19.3Battery Pack Short mode .....................................................................................101
19.4Regulator Force mode .........................................................................................101
19.5Register Description ............................................................................................102
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