AT89LP51 datasheet(110/113 Pages) ATMEL

110 / 113 page

3709C–MICRO–5/11

AT89LP51/52 - Preliminary

Table of Contents (Continued)

7.5

Software Reset ................................................................................................34

Power Saving Modes ............................................................................. 34

8.1

Idle Mode .........................................................................................................34

8.2

Power-down Mode ...........................................................................................35

8.3

Reducing Power Consumption ........................................................................37

Interrupts ................................................................................................ 37

9.1

Interrupt Response Time .................................................................................38

I/O Ports .................................................................................................. 41

10.1

Port Configuration ............................................................................................41

10.2

Port Read-Modify-Write ...................................................................................44

10.3

Port Alternate Functions ..................................................................................45

Timer 0 and Timer 1 ............................................................................... 46

11.1

Mode 0 – 13-bit Timer/Counter ........................................................................47

11.2

Mode 1 – 16-bit Timer/Counter ........................................................................47

11.3

Mode 2 – 8-bit Auto-Reload Timer/Counter .....................................................48

11.4

Mode 3 – 8-bit Split Timer ...............................................................................48

11.5

Clock Output (Pin Toggle Mode) .....................................................................49

Timer 2 .................................................................................................... 51

12.1

Timer 2 Registers ............................................................................................52

12.2

Capture Mode ..................................................................................................53

12.3

Auto-Reload Mode ...........................................................................................53

12.4

Baud Rate Generator ......................................................................................55

12.5

Frequency Generator (Programmable Clock Out) ...........................................56

External Interrupts ................................................................................. 57

Serial Interface (UART) .......................................................................... 57

14.1

Multiprocessor Communications .....................................................................59

14.2

Baud Rates ......................................................................................................59

14.3

Framing Error Detection ..................................................................................61

14.4

Automatic Address Recognition ......................................................................61

14.5

More About Mode 0 .........................................................................................63

14.6

More About Mode 1 .........................................................................................68

14.7

More About Modes 2 and 3 .............................................................................70

AT89LP51 Datasheet(PDF) 110 Page - ATMEL Corporation

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