S-25C160A Datasheet, PDF (18/39 Pages) Seiko Instruments Inc – Write protect function during the low power supply

SPI SERIAL E²PROM
S-25C160A
Rev.4.2_02_H
6. Read memory data (READ)
The READ operation is shown below. Input the instruction code and the address from serial data input (SI) after
inputting “L” to the chip select ( CS ). The input address is loaded to the internal address counter, and data in the
address is output from the serial data output (SO).
Next, by inputting the serial clock (SCK) keeping the chip select ( CS ) in “L”, the address is automatically incremented
so that data in the following address is sequentially output. The address counter rolls over to the first address by
increment in the last address.
To finish the Read cycle, set CS to “H”. It is possible to raise the chip select always during the cycle. During Write, the
READ instruction code is not be accepted or operated.
CS
WP
High / Low
SCK
SI
SO
1 2 3 4 5 6 7 8 9 10 11 21 22 23 24 25 26 27 28 29 30 31 32
Instruction
16-bit Address
High-Z
A15 A14 A13
A3 A2 A1 A0
Outputs the First Byte
Outputs
the Second
D7 D6 D5 D4 D3 D2 D1 D0 D7
Remark The higher addresses A15 to A11 = Don’t care.
Figure 17 READ Operation
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