AT89LP428 datasheet(146/149 Pages) ATMEL

146 / 149 page

3654A–MICRO–8/09

Power Saving Modes ............................................................................. 26

8.1

Idle Mode .........................................................................................................26

8.2

Power-down Mode ...........................................................................................27

Interrupts ................................................................................................ 29

9.1

Interrupt Response Time .................................................................................31

9.2

Interrupt Registers ...........................................................................................32

I/O Ports .................................................................................................. 35

10.1

Port Configuration ............................................................................................35

10.2

Port 2 Analog Functions ..................................................................................38

10.3

Port Read-Modify-Write ...................................................................................39

10.4

Port Alternate Functions ..................................................................................39

Enhanced Timer 0 and Timer 1 with PWM ........................................... 41

11.1

Mode 0 – Variable Width Timer/Counter .........................................................42

11.2

Mode 1 – 16-bit Auto-Reload Timer/Counter ...................................................42

11.3

Mode 2 – 8-bit Auto-Reload Timer/Counter .....................................................43

11.4

Mode 3 – 8-bit Split Timer ...............................................................................44

11.5

Pulse Width Modulation ...................................................................................47

Enhanced Timer 2 .................................................................................. 52

12.1

Timer 2 Registers ............................................................................................53

12.2

Capture Mode ..................................................................................................55

12.3

Auto-Reload Mode ...........................................................................................55

12.4

Baud Rate Generator ......................................................................................59

12.5

Frequency Generator (Programmable Clock Out) ...........................................60

Compare/Capture Array ........................................................................ 61

13.1

CCA Registers .................................................................................................62

13.2

Input Capture Mode .........................................................................................65

13.3

Output Compare Mode ....................................................................................66

13.4

Pulse Width Modulation Mode .........................................................................68

External Interrupts ................................................................................. 74

General-purpose Interrupts .................................................................. 74

Serial Interface (UART) .......................................................................... 77

16.1

Multiprocessor Communications .....................................................................77

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