10

P/N: PM1291

REV. 1.0, MAY 16, 2006

MX25L1605ZM

COMMAND DESCRIPTION

(1) Write Enable (WREN)

The Write Enable (WREN) instruction is for setting Write Enable Latch (WEL) bit. For those instructions like PP, SE, CE,

and WRSR, which are intended to change the device content, should be set every time after the WREN instruction setting

the WEL bit.

The sequence of issuing WREN instruction is: CS# goes low-> sending WREN instruction code-> CS# goes high. (see

Figure 12)

(2) Write Disable (WRDI)

The Write Disable (WRDI) instruction is for re-setting Write Enable Latch (WEL) bit.

The sequence of issuing WRDI instruction is: CS# goes low-> sending WRDI instruction code-> CS# goes high. (see Figure

13)

The WEL bit is reset by following situations:

- Power-up

- Write Disable (WRDI) instruction completion

- Write Status Register (WRSR) instruction completion

- Page Program (PP) instruction completion

- Sector Erase (SE) instruction completion

- Chip Erase (CE) instruction completion

(3) Read Identification (RDID)

The RDID instruction is for reading the manufacturer ID of 1-byte and followed by Device ID of 2-byte. The MXIC

Manufacturer ID is C2(hex), the memory type ID is 20(hex) as the first-byte device ID, and the individual device ID of

second-byte ID is as followings: 15(hex) for MX25L1605.

The sequence of issuing RDID instruction is: CS# goes low-> sending RDID instruction code -> 24-bits ID data out on SO

-> to end RDID operation can use CS# to high at any time during data out. (see Figure. 14)

While Program/Erase operation is in progress, it will not decode the RDID instruction, so there's no effect on the cycle of

program/erase operation which is currently in progress. When CS# goes high, the device is at standby stage.