Datasheet

iv
7734Q–AVR–02/12
AT90PWM81/161
13.17 PSCR Input Mode 9: Fixed Frequency Edge Retrigger PSC ........................167
13.18 PSCR Input Mode 14: Fixed Frequency Edge Retrigger PSCR and Deactivate
Output 168
13.19 Analog Synchronization .................................................................................169
13.20 Interrupt Handling ..........................................................................................169
13.21 PSC Clock Sources .......................................................................................169
13.22 Interrupts .......................................................................................................170
13.23 PSCR Register Definition ..............................................................................171
14 Serial Peripheral Interface – SPI: ........................................................ 180
14.1 Features ........................................................................................................180
14.2 Overview ........................................................................................................180
14.3 SS
Pin Functionality ......................................................................................184
14.4 Data Modes ...................................................................................................185
14.5 SPI
registers ..................................................................................................186
15 Voltage Reference and Temperature Sensor .................................... 189
15.1 Features ........................................................................................................189
15.2 On Chip voltage Reference and Temperature sensor overview ....................189
15.3 Register Description ......................................................................................190
15.4 Temperature Measurement ...........................................................................192
16 Analog Comparator ............................................................................. 194
16.1 Features ........................................................................................................194
16.2 Overview ........................................................................................................194
16.3 Shared pins between Analog Comparator and ADC .....................................196
16.4 Analog Comparator Register Description ......................................................196
17 Analog to Digital Converter - ADC ..................................................... 203
17.1 Features ........................................................................................................203
17.2 Operation .......................................................................................................205
17.3 Starting a Conversion ....................................................................................205
17.4 Prescaling and Conversion Timing ................................................................206
17.5 Changing Channel or Reference Selection ...................................................209
17.6 ADC Noise Canceler .....................................................................................210
17.7 ADC Conversion Result .................................................................................215
17.8 ADC Register Description ..............................................................................217
17.9 Amplifier .........................................................................................................222
17.10 Amplifier Control Registers ............................................................................225