S-25C010A-H Datasheet, PDF (17/33 Pages) Seiko Instruments Inc – OPERATION SPI SERIAL E2PROM FOR AUTOMOTIVE

Rev.2.3_01_C
105°C OPERATION SPI SERIAL E²PROM FOR AUTOMOTIVE
S-25C010A/020A/040A H Series
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 12 13 14 15 16 17 18 19 20 21 22 23 24
Instruction
8-bit Address
X
High-Z
A7^*1 A6 A5 A4 A3 A2 A1 A0
Outputs the First Byte
Outputs
the Second
D7 D6 D5 D4 D3 D2 D1 D0 D7
*1 In the S-25C010A, A7 = Don’t care because the address range is A6 to A0.
Remark X = Don’t care.
Figure 15 READ Operation (S-25C010A/020A)
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