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M93C46-BN3T View Datasheet(PDF) - STMicroelectronics

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M93C46-BN3T Datasheet PDF : 37 Pages
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READY/BUSY status
6
READY/BUSY status
M93C86, M93C76, M93C66, M93C56, M93C46
While the Write or Erase cycle is underway, for a WRITE, ERASE, WRAL or ERAL
instruction, the Busy signal (Q=0) is returned whenever Chip Select input (S) is driven high.
(Please note, though, that there is an initial delay, of tSLSH, before this status information
becomes available). In this state, the M93Cx6 ignores any data on the bus. When the Write
cycle is completed, and Chip Select Input (S) is driven high, the Ready signal (Q=1)
indicates that the M93Cx6 is ready to receive the next instruction. Serial Data Output (Q)
remains set to 1 until the Chip Select Input (S) is brought low or until a new start bit is
decoded.
7
Initial delivery state
The device is delivered with all bits in the memory array set to 1 (each byte contains FFh).
8
Common I/O operation
Serial Data Output (Q) and Serial Data Input (D) can be connected together, through a
current limiting resistor, to form a common, single-wire data bus. Some precautions must be
taken when operating the memory in this way, mostly to prevent a short circuit current from
flowing when the last address bit (A0) clashes with the first data bit on Serial Data Output
(Q). Please see the application note AN394 for details.
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