AK93C45CL Datasheet, PDF (10/16 Pages) Asahi Kasei Microsystems – 1K/2K/4Kbit Serial CMOS EEPROM

ASAHI KASEI
[AK93C45C/55C/65C]
EWEN / EWDS
When VCC is applied to the part, the part automatically powers up in the ERASE/WRITE Disable
state. In the ERASE/WRITE disable state, execution of WRITE, PAGE WRITE, WRAL instruction
is disable. Before WRITE, PAGE WRITE, WRAL instruction is executed, EWEN instruction must
be executed. The ERASE/WRITE enable state continues until EWDS instruction is executed or
VCC is removed from the part.
Execution of a read instruction is independent of both EWEN and EWDS instructions.
PE
CS
SK
0123456789
DI
DO
0100
XXX
Start bit
EW EN=11
EW DS=00
Hi-Z
AK93C45C output a logic "1" (Ready status),
if previous instruction is WRITE PAGE WRITE, WRAL.
X
X: Don't care
EWEN / EWDS (AK93C45C)
PE
CS
SK
0 1 2 3 4 5 6 7 8 9 10 11
DI
DO
0100
XXXXX
Start bit
EW EN=11
EW DS=00
Hi-Z
AK93C55C output a logic "1" (Ready status),
if previous instruction is WRITE PAGE WRITE, WRAL.
EWEN / EWDS (AK93C55C)
X
X: Don't care
PE
CS
SK
DI
DO
DAM06E-01
0 1 2 3 4 5 6 7 8 9 10 11
0100
XXXXX
Start bit
EW EN=11
EW DS=00
Hi-Z
AK93C65C output a logic "1" (Ready status),
if previous instruction is WRITE PAGE WRITE, WRAL.
EWEN / EWDS (AK93C65C)
X
X: Don't care
- 10 -
2005/10