mx25l3237d Macronix International Co., mx25l3237d Datasheet - Page 16

• Manufacturer Part Number: mx25l3237d
• Description: Serial Flash Memory
• Manufacturer: Macronix International Co.

P/N: PM1393
(1) Write Enable (WREN)
The Write Enable (WREN) instruction is for setting Write Enable Latch (WEL) bit. For those instructions like PP, 4PP, CP,
SE, BE, 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 9)
(2) Write Disable (WRDI)
The Write Disable (WRDI) instruction is for resetting Write Enable Latch (WEL) bit.
The sequence of issuing WRDI instruction is: CS# goes low-> sending WRDI instruction code-> CS# goes high. (see Figure
10)
The WEL bit is reset by following situations:
(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 24(hex) as the first-byte device ID, and the individual device ID of
second-byte ID are listed as table of "ID Definitions". (see table 7 in page 26)
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 11.)
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.
- Power-up
- Write Disable (WRDI) instruction completion
- Write Status Register (WRSR) instruction completion
- Page Program (PP) instruction completion
- Quad Page Program (4PP) instruction completion
- Sector Erase (SE) instruction completion
- Block Erase (BE) instruction completion
- Chip Erase (CE) instruction completion
- Continuously program mode (CP) instruction completion
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MX25L3237D
REV. 0.02, JUN. 13, 2008