K9W4G08U1M
K9K2G08Q0M
K9K2G08U0M
K9W4G16U1M
K9K2G16Q0M
K9K2G16U0M
FLASH MEMORY
Data Protection & Power up sequence
The device is designed to offer protection from any involuntary program/erase during power-transitions. An internal voltage detector
disables all functions whenever Vcc is below about 1.1V(1.8V device) or 2V(3.3V device). WP pin provides hardware protection and
is recommended to be kept at VIL during power-up and power-down. A recovery time of minimum 10µs is required before internal cir-
cuit gets ready for any command sequences as shown in Figure 18. The two step command sequence for program/erase provides
additional software protection.
Figure 18. AC Waveforms for Power Transition
1.8V device : ~ 1.5V
3.3V device : ~ 2.5V
1.8V device : ~ 1.5V
3.3V device : ~ 2.5V
VCC
High
WP
WE
10µs
39
SAMSUNG [ SAMSUNG ]
