W39L040A Data Sheet

512K

× 8 CMOS FLASH MEMORY

Publication Release Date:April 14, 2005

- 1 -

Revision A3

Table of Contents-

1.

GENERAL DESCRIPTION ......................................................................................................... 3

2.

FEATURES ................................................................................................................................. 3

3.

PIN CONFIGURATIONS ............................................................................................................ 4

4.

BLOCK DIAGRAM ...................................................................................................................... 4

5.

PIN DESCRIPTION..................................................................................................................... 4

6.

FUNCTIONAL DESCRIPTION ................................................................................................... 5

6.1

Device Bus Operation..................................................................................................... 5

6.1.1

Read Mode .......................................................................................................................5

6.1.2

Write Mode .......................................................................................................................5

6.1.3

Standby Mode ..................................................................................................................5

6.1.4

Output Disable Mode........................................................................................................5

6.1.5

Auto-select Mode..............................................................................................................5

6.2

Data Protection ............................................................................................................... 6

6.2.1

Low VDD Inhibit................................................................................................................6

6.2.2

Write Pulse "Glitch" Protection .........................................................................................6

6.2.3

Logical Inhibit ...................................................................................................................6

6.2.4

Power-up Write and Read Inhibit ......................................................................................6

6.3

Command Definitions ..................................................................................................... 6

6.3.1

Read Command ...............................................................................................................6

6.3.2

Auto-select Command ......................................................................................................7

6.3.3

Byte Program Command ..................................................................................................7

6.3.4

Chip Erase Command ......................................................................................................7

6.3.5

Sector Erase Command ...................................................................................................8

6.4

Write Operation Status ................................................................................................... 8

6.4.1

DQ7: #Data Polling...........................................................................................................8

6.4.2

DQ6: Toggle Bit ................................................................................................................9

6.5

Table of Operating Modes .............................................................................................. 9

6.5.1

Device Bus Operations.....................................................................................................9

6.5.2

Auto-select Codes (High Voltage Method) .......................................................................9

6.5.3

Sector Address Table .....................................................................................................10

6.5.4

Command Definitions .....................................................................................................10

6.6

Embedded Programming Algorithm ............................................................................. 11

6.7

Embedded Erase Algorithm.......................................................................................... 12