m58bw32f STMicroelectronics, m58bw32f Datasheet - Page 38

• Manufacturer Part Number: m58bw32f
• Description: 16 Or 32 Mbit X32, Boot Block, Burst 3.3v Supply Flash Memories
• Manufacturer: STMicroelectronics

Command interface
4.12
4.13
4.14
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Set Burst Configuration Register command
The Set Burst Configuration Register command is used to write a new value to the Burst
Configuration Register which defines the burst length, type, X and Y latencies,
Synchronous/Asynchronous Read mode.
Two Bus Write cycles are required to issue the Set Burst Configuration Register command.
The first cycle writes the setup command. The second cycle writes the address where the
new Burst Configuration Register content is to be written, and confirms the command. If the
command is not confirmed, the sequence is aborted and the device outputs the Status
Register with bits 4 and 5 set to ‘1’. Once the command is issued the memory returns to
Read mode as if a Read Memory Array command had been issued.
The value for the Burst Configuration Register is always presented on A0-A15. M0 is on A0,
M1 on A1, etc.; the other address bits are ignored.
Set Block Protection Configuration Register command
The Set Block Protection Configuration Register command is used to configure the Block
Protection Configuration Register to ‘protected’, for a specific block. Protected blocks are
fully protected from program or erase when WP pin is Low, V
block can be changed to ‘unprotected’ by using the Clear Block Protection Configuration
Register command. At power-up, all block are configured as ‘protected’.
Two bus operations are required to issue a Set Block Protection Configuration Register
command:
To protect multiple blocks, the Set Block Protection Configuration Register command must
be repeated for each block.
Any attempt to re-protect a block already protected does not change its status.
Clear Block Protection Configuration Register command
The Clear Block Protection Configuration Register command is used to configure the Block
Protection Configuration Register to ‘unprotected’, for a specific block thus allowing
program/erase operations to this block, regardless of the WP pin status.
Two bus operations are required to issue a Clear Block Protection Configuration Register
command:
To unprotect multiple blocks, the Clear Block Protection Configuration Register command
must be repeated for each block.
Any attempt to unprotect a block already unprotected does not affect its status.
The first cycle writes the setup command
The second write cycle specifies the address of the block to protect and confirms the
command. If the command is not confirmed, the sequence is aborted and the device
outputs the Status Register with bits 4 and 5 set to ‘1’.
The first cycle writes the setup command
The second write cycle specifies the address of the block to unprotect and confirms the
command. If the command is not confirmed, the sequence is aborted and the device
outputs the Status Register with bits 4 and 5 set to ‘1’.
IL
. The status of a protected
M58BW16F, M58BW32F