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ST93C57M6TR Datasheet(PDF) 7 Page - STMicroelectronics |
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ST93C57M6TR Datasheet(HTML) 7 Page - STMicroelectronics |
7 / 13 page AI00878C 11 0 An A0 Qn Q0 DATA OUT D S Q READ S WRITE ADDR OP CODE 1 0 An A0 DATA IN D Q OP CODE Dn D0 1 BUSY READY S ERASE WRITE ENABLE 1 0 Xn X0 D OP CODE 1 01 S ERASE WRITE DISABLE 1 0 Xn X0 D OP CODE 00 0 CHECK STATUS ADDR Figure 6. READ, WRITE, EWEN, EWDS Sequences (Q = 0) will be returned if S is driven high, and the ST93C56 will ignore any data on the bus. When the write cycle is completed, the Ready signal (Q = 1) will indicate (if S is driven high) that the ST93C56 is ready to receive a new instruction. Programming is internally self-timed (the external clock signal on C input may be disconnected or left running after the start of a programming cycle) and does not require an Erase instruction prior to the Write in- struction (The Write instruction includes an auto- matic erase cycle before programing data). Notes: 1. An: n = 7 for x16 org. and 8 for x8 org. 2. Xn: n = 5 for x16 org. and 6 for x8 org. 7/13 ST93C56/56C, ST93C57C |
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