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M93S56-125 Datasheet(PDF) 9 Page - STMicroelectronics |
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M93S56-125 Datasheet(HTML) 9 Page - STMicroelectronics |
9 / 28 page M93S66-125 M93S56-125 M93S46-125 Instructions Doc ID 022567 Rev 1 9/28 Table 3. Instruction set for the M93S56, M93S66 Instruction Description W PRE Start bit Opcode Address(1), (2) Data Required clock cycles Additional comments READ Read Data from Memory X 0 1 10 A7-A0 Q15-Q0 WRITE Write Data to Memory 1 0 1 01 A7-A0 D15-D0 27 Write is executed if the address is not inside the Protected area PAWRITE Page Write to Memory 10 1 11 A7-A0 N x D15-D0 11 + N x 16 Write is executed if all the N addresses are not inside the Protected area WRAL Write All Memory with same Data 1 0 1 00 01XXXXXX D15-D0 27 Write all data if the Protection Register is cleared WEN Write Enable 1 0 1 00 11XXXXXX 11 WDS Write Disable X 0 1 00 00XXXXXX 11 PRREAD Protection Register Read X1 1 10 XXXXXXX X Q7-Q0 + Flag Data Output = Protection Register content + Protection Flag bit PRWRITE Protection Register Write 11 1 01 A7-A0 11 Data above specified address A7-A0 are protected PRCLEAR Protection Register Clear 1 1 1 11 11111111 11 Protect Flag is also cleared (cleared Flag = 1) PREN Protection Register Enable 1 1 1 00 11XXXXXX 11 PRDS Protection Register Disable 1 1 1 00 00000000 11 OTP bit is set permanently 1. X = Don't Care bit. 2. Address bit A7 is not decoded by the M93S56-125. |
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