Specifications

i
3706C–MICRO–2/11
AT89LP3240/6440
Table of Contents
Features ..................................................................................................... 1
1 Pin Configurations ................................................................................... 2
1.1 40P6: 40-lead PDIP ...........................................................................................2
1.2 44A: 44-lead TQFP (Top View) .........................................................................2
1.3 44J: 44-lead PLCC ............................................................................................3
1.4 44M1: 44-pad VQFN/MLF .................................................................................3
1.5 Pin Description ..................................................................................................4
2 Overview ................................................................................................... 6
2.1 Block Diagram ...................................................................................................7
2.2 System Configuration ........................................................................................8
2.3 Comparison to Standard 8051 ...........................................................................9
3 Memory Organization ............................................................................ 11
3.1 Program Memory .............................................................................................11
3.2 Internal Data Memory ......................................................................................12
3.3 External Data Memory .....................................................................................13
3.4 Extended Stack ...............................................................................................20
3.5 In-Application Programming (IAP) ...................................................................21
4 Special Function Registers ................................................................... 22
5 Enhanced CPU ....................................................................................... 23
5.1 Multiply–Accu mulate Unit (MAC) .....................................................................24
5.2 Enhanced Dual Data Pointers .........................................................................25
5.3 Instruction Set Extensions ...............................................................................30
6 System Clock ......................................................................................... 31
6.1 Crystal Oscillator .............................................................................................31
6.2 External Clock Source .....................................................................................32
6.3 Internal RC Oscillator ......................................................................................32
6.4 System Clock Out ............................................................................................32
6.5 System Clock Divider ......................................................................................32
7 Reset ....................................................................................................... 33
7.1 Power-on Reset ...............................................................................................33
7.2 Brown-out Reset ..............................................................................................35
7.3 External Reset .................................................................................................35