M29W320EB データシートの表示（PDF） - Numonyx -> Micron

部品番号

コンポーネント説明

メーカー

M29W320EB

32Mbit (4Mbx8 or 2Mbx16, Uniform Parameter Blocks, Boot Block) 3V supply Flash memory

Numonyx -> Micron 

M29W320ET, M29W320EB

Bus operations

3.5

Automatic Standby

If CMOS levels (VCC ± 0.2V) are used to drive the bus and the bus is inactive for 300ns or

more the memory enters Automatic Standby where the internal Supply current is reduced to

the Standby Supply current, ICC2. The Data Inputs/Outputs will still output data if a Bus

Read operation is in progress.

3.6

3.6.1

3.6.2

Special bus operations

Additional bus operations can be performed to read the Electronic signature and also to

apply and remove Block Protection. These bus operations are intended for use by

programming equipment and are not usually used in applications. They require VID to be

applied to some pins.

Electronic signature

The memory has two codes, the manufacturer code and the device code, that can be read

to identify the memory. These codes can be read by applying the signals listed in Table 2

and Table 3, Bus operations.

Block Protect and Chip Unprotect

Groups of blocks can be protected against accidental Program or Erase. The Protection

groups are shown in Appendix A: Block Addresses, Table 20 and Table 21, Block

Addresses. The whole chip can be unprotected to allow the data inside the blocks to be

changed.

The VPP/Write Protect pin can be used to protect the two outermost boot blocks. When

VPP/Write Protect is at VIL the two outermost boot blocks are protected and remain

protected regardless of the Block Protection Status or the Reset/Block Temporary

Unprotect pin status.

Block Protect and Chip Unprotect operations are described in Appendix D: Block Protection.

17/63

Share Link: