AT89LP4052 datasheet(92/94 Pages) ATMEL

92 / 94 page

3547J–MICRO–10/09

AT89LP2052/LP4052

Table of Contents (Continued)

12.3 External Reset .....................................................................................................14

12.4 Watchdog Reset ..................................................................................................14

13. Power Saving Modes ............................................................................. 14

13.1 Idle Mode .............................................................................................................15

13.2 Power-down Mode ..............................................................................................15

14. Interrupts ................................................................................................ 16

14.1 Interrupt Response Time .....................................................................................17

15. I/O Ports .................................................................................................. 20

15.1 Quasi-bidirectional Output ...................................................................................20

15.2 Input-only Mode ...................................................................................................21

15.3 Open-drain Output ...............................................................................................22

15.4 Push-pull Output ..................................................................................................22

15.5 Port 1 Analog Functions ......................................................................................22

15.6 Port Read-Modify-Write .......................................................................................23

15.7 Port Alternate Functions ......................................................................................23

16. Enhanced Timer/Counters .................................................................... 24

16.1 Mode 0 ................................................................................................................24

16.2 Mode 1 ................................................................................................................25

16.3 Mode 2 ................................................................................................................26

16.4 Mode 3 ................................................................................................................26

16.5 Pulse Width Modulation .......................................................................................29

16.6 Timer/Counter Pin Configuration .........................................................................30

17. External Interrupts ................................................................................. 30

18. Serial Interface ....................................................................................... 31

18.1 Multiprocessor Communications .........................................................................31

18.2 Baud Rates ..........................................................................................................33

18.3 More About Mode 0 .............................................................................................34

18.4 More About Mode 1 .............................................................................................36

18.5 More About Modes 2 and 3 .................................................................................38

18.6 Framing Error Detection ......................................................................................41

18.7 Automatic Address Recognition ..........................................................................41

AT89LP4052 Datasheet(PDF) 92 Page - ATMEL Corporation