AT89LP2052 Datasheet, PDF (87/89 Pages) ATMEL Corporation – 8-bit Microcontroller with 2/4-Kbyte Flash

Table of Contents (Continued)
12. Power Saving Modes ............................................................................. 11
12.1 Idle Mode ...........................................................................................................12
12.2 Power-down Mode .............................................................................................12
13. Interrupts ................................................................................................ 13
13.1 Interrupt Response Time ....................................................................................14
14. I/O Ports .................................................................................................. 17
14.1 Quasi-bidirectional Output ..................................................................................17
14.2 Input-only Mode .................................................................................................18
14.3 Open-drain Output .............................................................................................19
14.4 Push-pull Output ................................................................................................19
14.5 Port 1 Analog Functions .....................................................................................19
14.6 Port Read-Modify-Write ......................................................................................20
14.7 Port Alternate Functions .....................................................................................20
15. Enhanced Timer/Counters .................................................................... 21
15.1 Mode 0 ...............................................................................................................21
15.2 Mode 1 ...............................................................................................................22
15.3 Mode 2 ...............................................................................................................23
15.4 Mode 3 ...............................................................................................................23
15.5 Pulse Width Modulation .....................................................................................26
15.6 Timer/Counter Pin Configuration ........................................................................27
16. External Interrupts ................................................................................. 27
17. Serial Interface ....................................................................................... 28
17.1 Multiprocessor Communications ........................................................................28
17.2 Baud Rates ........................................................................................................30
17.3 More About Mode 0 ............................................................................................31
17.4 More About Mode 1 ............................................................................................33
17.5 More About Modes 2 and 3 ................................................................................35
17.6 Framing Error Detection .....................................................................................38
17.7 Automatic Address Recognition .........................................................................38
ii AT89LP2052/LP4052 [Preliminary]
3547A–MICRO–3/05