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5B11N-Rev.F001

EC25C64

64Kbits SPI Serial EEPROM

Functional Block Diagram

Serial Interface Description

Master：The device that provides a clock signal.

Slave：EC25C64.

Transmitter/Receiver：The EC25C64 has both data input (SI) and data output (SO).

MSB：MSB (Most Significant Bit) is the first bit being transmitted or received.

Op-Code：Operational instruction code typically sent to the EC25C64 is the first byte of information

transmitted after

is Low. If the Op-Code is a valid instruction as listed in Table 3, then it will be

decoded appropriately. It is prohibited to send an invalid Op-Code.