资 源 简 介
The Microchip Technology Inc. 25AA640A/25LC640A(25XX640A*) are 64k-bit Serial Electrically ErasablePROMs. The memory is accessed via a simple SerialPeripheral Interface (SPI) compaTIble serial bus. Thebus signals required are a clock input (SCK) plus separatedata in (SI) and data out (SO) lines. Access to thedevice is controlled through a Chip Select (CS) input.CommunicaTIon to the device can be paused via thehold pin (HOLD). While the device is paused, transiTIonson its inputs will be ignored, with the excepTIon ofChip Select, allowing the host to service higher priorityinterrupts.The 25XX640A is available in standard packagesincluding 8-lead PDIP and SOIC, and advancedpackaging including 8-lead MSOP, 8-lead TSSOP andDFN.
