AT89LP4052 datasheet(91/94 Pages) ATMEL

91 / 94 page

3547J–MICRO–10/09

AT89LP2052/LP4052

Table of Contents

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

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

2.1

20-lead PDIP/SOIC/TSSOP ..................................................................................2

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

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

Memory Organization .............................................................................. 4

5.1

Program Memory ...................................................................................................4

5.2

Data Memory .........................................................................................................5

Special Function Registers ..................................................................... 6

Comparison to Standard 8051 ................................................................ 7

7.1

System Clock ........................................................................................................7

7.2

Instruction Execution with Single-cycle Fetch .......................................................7

7.3

Interrupt Handling ..................................................................................................7

7.4

Timer/Counters ......................................................................................................7

7.5

Serial Port ..............................................................................................................7

7.6

Watchdog Timer ....................................................................................................7

7.7

I/O Ports ................................................................................................................8

7.8

Reset .....................................................................................................................8

Enhanced CPU ......................................................................................... 8

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

9.1

Branching Instructions .........................................................................................10

9.2

MOVX-related Instructions, Data Memory ...........................................................10

10. System Clock ......................................................................................... 10

10.1 Crystal Oscillator .................................................................................................10

10.2 External Clock Source .........................................................................................10

10.3 System Clock Out ................................................................................................10

11. Oscillator Characteristics ..................................................................... 11

12. Reset ....................................................................................................... 14

12.1 Power-on Reset ...................................................................................................14

12.2 Brown-out Reset ..................................................................................................14

AT89LP4052 Datasheet(PDF) 91 Page - ATMEL Corporation

AT89LP4052 Datasheet(HTML) 91 Page - ATMEL Corporation

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