243
9157C–AVR–03/12
Atmel ATtiny88 Automotive
12
16-bit Timer/Counter1 with PWM .......................................................... 86
12.1
Features ..........................................................................................................86
12.2
Overview ..........................................................................................................86
12.3
Accessing 16-bit Registers ..............................................................................88
12.4
Timer/Counter Clock Sources .........................................................................91
12.5
Counter Unit ....................................................................................................91
12.6
Input Capture Unit ...........................................................................................92
12.7
Output Compare Units .....................................................................................94
12.8
Compare Match Output Unit ............................................................................96
12.9
Modes of Operation .........................................................................................98
12.10
Timer/Counter Timing Diagrams ...................................................................106
12.11
Register Description ......................................................................................108
13
Timer/Counter0 and Timer/Counter1 Prescalers .............................. 116
13.1
Internal Clock Source ....................................................................................116
13.2
Prescaler Reset .............................................................................................116
13.3
External Clock Source ...................................................................................116
13.4
Register Description ......................................................................................118
14
Serial Peripheral Interface – SPI ......................................................... 119
14.1
Features ........................................................................................................119
14.2
Overview ........................................................................................................119
14.3
SS Pin Functionality ......................................................................................123
14.4
Data Modes ...................................................................................................124
14.5
Register Description ......................................................................................125
15
2-Wire Serial Interface ......................................................................... 128
15.1
Features ........................................................................................................128
15.2
2-wire Serial Interface Bus Definition ............................................................128
15.3
Data Transfer and Frame Format ..................................................................129
15.4
Multi-master Bus Systems, Arbitration and Synchronization .........................132
15.5
Overview of the TWI Module .........................................................................134
15.6
Using the TWI ................................................................................................136
15.7
Transmission Modes .....................................................................................140
15.8
Multi-master Systems and Arbitration ............................................................153
15.9
Register Description ......................................................................................155