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MX25L12845EMI-10G Datasheet(PDF) 35 Page - Macronix International |
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MX25L12845EMI-10G Datasheet(HTML) 35 Page - Macronix International |
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35 / 74 page  35 MX25L12845E P/N: PM1428 REV. 1.8, FEB. 10, 2012 (30) Read Block Lock Status (RDBLOCK) This instruction is only effective after WPSEL was executed. The RDBLOCK instruction is for reading the status of protection lock of a specified block(or sector), using A23-A16 (or A23-A12) address bits to assign a 64K bytes block (4K bytes sector) and read protection lock status bit which the first byte of Read-out cycle. The status bit is"1" to indicate that this block has be protected, that user can read only but cannot write/program /erase this block. The status bit is "0" to indicate that this block hasn't be protected, and user can read and write this block. The sequence of issuing RDBLOCK instruction is: CS# goes low → send RDBLOCK (3Ch) instruction → send 3 ad- dress bytes to assign one block on SI pin → read block's protection lock status bit on SO pin → CS# goes high. (Please refer to Figure 38) (31) Gang Block Lock/Unlock (GBLK/GBULK) These instructions are only effective after WPSEL was executed. The GBLK/GBULK instruction is for enable/disable the lock protection block of the whole chip. The WREN (Write Enable) instruction is required before issuing GBLK/GBULK instruction. The sequence of issuing GBLK/GBULK instruction is: CS# goes low → send GBLK/GBULK (7Eh/98h) instruction → CS# goes high. (Please refer to Figure 39) The CS# must go high exactly at the byte boundary, otherwise, the instruction will be rejected and not be executed. (32) Clear SR Fail Flags (CLSR) The CLSR instruction is for resetting the Program/Erase Fail Flag bit of Security Register. It should be executed be- fore program/erase another block during programming/erasing flow without read array data. The sequence of issuing CLSR instruction is: CS# goes low → send CLSR instruction code → CS# goes high. The CS# must go high exactly at the byte boundary; otherwise, the instruction will be rejected and not executed. |
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