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ST93C47AM3013TR датащи(PDF) 8 Page - STMicroelectronics |
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ST93C47AM3013TR датащи(HTML) 8 Page - STMicroelectronics |
8 / 13 page AI00879B S ERASE 11 D Q ADDR OP CODE 1 BUSY READY CHECK STATUS S ERASE ALL 10 D Q OP CODE 1 BUSY READY CHECK STATUS 00 An A0 Xn X0 ADDR Figure 7. ERASE, ERAL Sequences (Q = 0) will be returned if S is driven high, and the ST93C46 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 ST93C46 is ready to receive a new instruction. The Write instruction includes an automatic Erase cycle before writing the data, it is therefore unnec- essary to execute an Erase instruction before a Write instruction execution. Erase All The Erase All instruction (ERAL) erases the whole memory (all memory bits are set to ”1”). A dummy address is input during the instruction transfer and the erase is made in the same way as the ERASE instruction above. If the ST93C46 is still performing the write cycle, the Busy signal (Q = 0) will be returned if S is driven high, and the ST93C46 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 ST93C46 is ready to receive a new instruction. Write All For correct operation, an ERAL instruction should be executed before the WRAL instruction. The Write All instruction (WRAL) writes the Data Input byte or word to all the addresses of the memory. In the WRAL instruction, NO automatic erase is made so all bytes/words must be erased before the WRAL instruction. If the ST93C46 is still performing the write cycle, the Busy signal (Q = 0) will be returned if S is driven high, and the ST93C46 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 ST93C46 is ready to receive a new instruction. Notes: 1. An: n = 5 for x16 org. and 6 for x8 org. 2. Xn: n = 3 for x16 org. and 4 for x8 org. INSTRUCTIONS (cont’d) 8/13 ST93C46A/46C/46T, ST93C47C/47T |
Аналогичный номер детали - ST93C47AM3013TR |
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Аналогичное описание - ST93C47AM3013TR |
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