AT89LP216-20PI datasheet(87/90 Pages) ATMEL

87 / 90 page

3621A–MICRO–6/06

AT89LP216 [Preliminary]

Table of Contents

Description ............................................................................................... 1

Pin Configuration ..................................................................................... 2

2.1 AT89LP216: 16-lead PDIP/SOIC/TSSOP ..............................................................2

Pin Description ......................................................................................... 3

Block Diagram .......................................................................................... 4

Comparison to Standard 8051 ................................................................ 4

5.1 System Clock ..........................................................................................................4

5.2 Instruction Execution with Single-cycle Fetch .........................................................4

5.3 Interrupt Handling ...................................................................................................5

5.4 Timer/Counters .......................................................................................................5

5.5 Serial Port ...............................................................................................................5

5.6 Watchdog Timer .....................................................................................................5

5.7 I/O Ports .................................................................................................................. 5

5.8 Reset ......................................................................................................................6

Memory Organization .............................................................................. 6

6.1 Program Memory ....................................................................................................6

6.2 Data Memory ..........................................................................................................7

Special Function Registers ..................................................................... 8

Enhanced CPU ......................................................................................... 9

8.1 Restrictions on Certain Instructions ......................................................................10

System Clock ......................................................................................... 11

9.1 Crystal Oscillator ...................................................................................................11

9.2 External Clock Source ..........................................................................................11

9.3 Internal RC Oscillator ............................................................................................11

9.4 System Clock Out .................................................................................................11

10. Reset ....................................................................................................... 12

10.1 Power-on Reset ....................................................................................................12

10.2 Brown-out Reset ...................................................................................................14

10.3 External Reset ......................................................................................................14

10.4 Watchdog Reset ...................................................................................................15

10.5 Software Reset .....................................................................................................15

11. Power Saving Modes ............................................................................. 15

11.1 Idle Mode ..............................................................................................................15

11.2 Power-down Mode ................................................................................................15

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