AK6420A-1 Datasheet, PDF (8/15 Pages) Asahi Kasei Microsystems – 2K / 4K / 8Kbit Serial CMOS EEPROM

ASAHI KASEI
[AK6420A/40A/80A]
WREN / WRDS ( Write Enable and Write Disable )
When Vcc is applied to the part, it powers up in the programming disable (WRDS) state. Programming must
be preceded by a programming enable (WREN) instruction. Programming remains enabled until a
programming disable (WRDS) instruction is executed or Vcc is removed from the part. The programming
disable instruction is provided to protect against accidental data disturb. Execution of a read instruction is not
affected by both WREN and WRDS instructions.
WREN/WRDS (AK6420A/40A/80A)
DAS01E-00
-8-
1999/05