M95320-DRE View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'M95320-DRE' PDF : 41 Pages View PDF
Instructions
M95320-DRE
The Read Lock Status instruction is not accepted and not executed if a Write cycle is
currently in progress.
Figure 14. Read Lock Status sequence
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4.10
Lock Identification Page (LID)
The Lock Identification Page (LID) command is used to permanently lock the Identification
Page in Read-only mode.
The LID instruction is issued by driving Chip Select (S) low, sending (MSB first) the
instruction code, the address and a data byte on Serial Data input (D), and driving Chip
Select (S) high. In the address sent, A10 must be equal to 1. All other address bits are Don't
Care (it might be easier to define these bits as 0, as shown in Table 7). The data byte sent
must be equal to the binary value xxxx xx1x, where x = Don't Care. The LID instruction is
terminated by driving Chip Select (S) high at a data byte boundary, otherwise, the instruction
is not executed.
Figure 15. Lock ID sequence
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Driving Chip Select (S) high at a byte boundary of the input data triggers the self-timed Write
cycle which duration is tW (specified in Table 13). The instruction sequence is shown in
Figure 15.
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