鈥?/div>
only 5 outputs and 1 input required from 碌C for handshake to access all keys in the SA253x keyboard matrix
universal interface, not restricted to specific Microcontrollers
supports both 3V- and 5V- 碌Cs
same hardware for all single chip telephones : SA2531/2
same software for all single chip telephones, only key labels must be replaced
Table of Contents
1 SCOPE.............................................................................................................................................................................................................1
2 KEY FEATURES ..............................................................................................................................................................................................1
3 OTHER APPLICABLE DOCUMENTS AND PAPERS ......................................................................................................................................1
4 REVISION STATUS .........................................................................................................................................................................................2
5 GENERAL DESCRIPTION ...............................................................................................................................................................................2
6 HARDWARE CONFIGURATION ......................................................................................................................................................................2
7 APPLICATION SCHEMATIC:...........................................................................................................................................................................2
8 SCANNING TABLE/FLOWCHART...................................................................................................................................................................3
9 SAMPLE SOFTWARE......................................................................................................................................................................................3
10 KEY ENTRY SIGNAL TABLE: .......................................................................................................................................................................4
11 APPENDIX A: APPLICATION SCHEMATIC ..................................................................................................................................................5
12 APPENDIX B: FLOWCHART: ........................................................................................................................................................................6
13 APPENDIX C: SAMPLE SOFTWARE LISTING .............................................................................................................................................7
14 LIABILITY AND COPYRIGHT STATEMENT ................................................................................................................................................13
3 Other applicable documents and papers
1.
2.
3.
4.
Data Sheet SA2531, SA2532
Pin-out Comparison SA2531/2
Product Presentation
Single Chip Telephone Evolution (Apr. 16, 1996)
SAN3010
PDS038-SA2531/2-003
Rev. B
21-03-00
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