X25040
Key Features
- The bus signals are a clock input (SCK) plus separate data in (SI) and data out (SO) lines
- Access to the device is controlled through a chip select (CS) input, allowing any number of devices to share the same bus
- The X25040 also features two additional inputs that provide the end user with added flexibility
- By asserting the HOLD input, the X25040 will ignore transitions on its inputs, thus allowing the host to service higher priority interrupts
- During a read cycle, data is shifted out on this pin
- Data is clocked out by the falling edge of the serial clock
- Serial Input (SI) SI is the serial data input pin
- All opcodes, byte addresses, and data to be written to the memory are input on this pin
- Data is latched by the rising edge of the serial clock
- Serial Clock (SCK) The Serial Clock controls the serial bus timing for data input and output
