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NM93CS06 Scheda tecnica(PDF) 6 Page - National Semiconductor (TI) |
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NM93CS06 Scheda tecnica(HTML) 6 Page - National Semiconductor (TI) |
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6 / 14 page  Instruction Set for the NM93CS06 and NM93CS46 Instruction SB Op Code Address Data PRE PE Comments READ 1 10 A5 – A0 0 X Reads data stored in memory starting at specified address WEN 1 00 11XXXX 0 1 Enable all programming modes WRITE 1 01 A5 – A0 D15 – D0 0 1 Writes address if unprotected WRALL 1 00 01XXXX D15 – D0 0 1 Writes all registers Valid only when Protect Register is cleared WDS 1 00 00XXXX 0 X Disables all programming modes PRREAD 1 10 XXXXXX 1 X Reads address stored in Protect Register PREN 1 00 11XXXX 1 1 Must immediately precede PRCLEAR PRWRITE and PRDS instructions PRCLEAR 1 11 111111 1 1 Clears the Protect Register so that no registers are protected from WRITE PRWRITE 1 01 A5 – A0 1 1 Programs address into Protect Register Thereafter memory addresses t the address in Protect Register are protected from WRITE PRDS 1 00 000000 1 1 ONE TIME ONLY instruction after which the address in the Protect Register cannot be altered Note Address bits A5 and A4 become ‘‘Don’t Care’’ for the NM93CS06 Instruction Set for the NM93CS56 and NM93CS66 Instruction SB Op Code Address Data PRE PE Comments READ 1 10 A7 – A0 0 X Reads data stored in memory starting at specified address WEN 1 00 11XXXXXX 0 1 Enable all programming modes WRITE 1 01 A7 – A0 D15 – D0 0 1 Writes address if unprotected WRALL 1 00 01XXXXXX D15 – D0 0 1 Writes all registers Valid only when Protect Register is cleared WDS 1 00 00XXXXXX 0 X Disables all programming modes PRREAD 1 10 XXXXXXXX 1 X Reads address stored in Protect Register PREN 1 00 11XXXXXX 1 1 Must immediately precede PRCLEAR PRWRITE and PRDS instructions PRCLEAR 1 11 11111111 1 1 Clears the ‘‘protect register’’ so that no registers are protected from WRITE PRWRITE 1 01 A7 – A0 1 1 Programs address into Protect Register Thereafter memory addresses t the address in Protect Register are protected from WRITE PRDS 1 00 00000000 1 1 ONE TIME ONLY instruction after which the address in the Protect Register cannot be altered Note Address bit A7 becomes ‘‘Don’t Care’’ for the NM93CS56 6 |
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