S-25C128A Datasheet, PDF (3/31 Pages) Seiko Instruments Inc – Write protect function during the low power supply voltage

Rev.4.2_02_H
 Block Diagram
Voltage Detector
CS
SCK
SI
HOLD
WP
SO
Clock Counter
Data Register
Mode
Decoder
Output
Control
Circuit
Address Register
Status Register
Read Circuit
VCC
GND
Figure 3
SPI SERIAL E²PROM
S-25C128A
Step-up Circuit
Page Latch
Memory
Cell
Array
Status
Memory Cell Array
Y Decoder
3