AT83SND2CMP3B datasheet(237/241 Pages) ATMEL

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237

4341F–MP3–03/06

AT8xC51SND2C/MP3B

Description ............................................................................................... 2

Typical Applications ................................................................................ 2

Block Diagram .......................................................................................... 3

Pin Description ......................................................................................... 4

4.1 Pinouts ..................................................................................................................... 4

4.2 ................................................................................................................................. 5

4.3 Signals...................................................................................................................... 6

4.4 Internal Pin Structure.............................................................................................. 12

Clock Controller ..................................................................................... 13

5.1 Oscillator ................................................................................................................ 13

5.2 X2 Feature.............................................................................................................. 14

5.3 PLL ......................................................................................................................... 14

5.4 Registers ................................................................................................................ 16

Program/Code Memory ......................................................................... 18

6.1 ROM Memory Architecture ..................................................................................... 19

6.2 Flash Memory Architecture .................................................................................... 19

6.3 Hardware Security System ..................................................................................... 20

6.4 Boot Memory Execution ......................................................................................... 20

6.5 Preventing Flash Corruption................................................................................... 21

6.6 Registers ................................................................................................................ 22

6.7 Hardware Bytes ...................................................................................................... 22

Data Memory .......................................................................................... 24

7.1 Internal Space ........................................................................................................ 24

7.2 External Space ....................................................................................................... 25

7.3 Dual Data Pointer ................................................................................................... 27

7.4 Registers ................................................................................................................ 29

Special Function Registers ................................................................... 31

Interrupt System .................................................................................... 37

9.1 Interrupt System Priorities ...................................................................................... 37

9.2 External Interrupts .................................................................................................. 40

9.3 Registers ................................................................................................................ 41

10. Power Management ............................................................................... 47

10.1 Reset .................................................................................................................... 47

AT83SND2CMP3B Datasheet(PDF) 237 Page - ATMEL Corporation