AK93C85A_04 Datasheet, PDF (7/13 Pages) Asahi Kasei Microsystems – 16K / 32K / 64Kbit Serial CMOS EEPROM

ASAHI KASEI
[AK93C85A/95A/10A]
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 instruction is disable. Before
WRITE 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.
CS
SK
0 1 2 3 4 5 6 7 8 9 10 11 12 13
DI
DO
0100
XXXXXXXX
Start bit
EWEN=11
EWDS=00
Hi-Z
AK93C85A output a logic "1" (Ready status),
if previous instruction is WRITE.
X: Don't care
EWEN / EWDS (AK93C85A)
CS
SK
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
DI
DO
0100
XXXXXXXXX
Start bit
EWEN=11
EWDS=00
Hi-Z
AK93C95A output a logic "1" (Ready status),
if previous instruction is WRITE.
X: Don't care
EWEN / EWDS (AK93C95A)
CS
SK
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
DI
DO
0100
XXXXXXXXXX
Start bit
EWEN=11
EWDS=00
Hi-Z
AK93C10A output a logic "1" (Ready status),
if previous instruction is WRITE.
X: Don't care
EWEN / EWDS (AK93C10A)
DAM02E-03
-7-
2004/05