Block or page lock features in serial interface memory

摘要

Embodiments are provided for protecting boot block space in a memory device. Such a memory device may include a memory array having a protected portion and a serial interface controller. The memory device may have a register that enables or disables access to the portion when data indicating whether to enable or disable access to the portion is written into the register via a serial data in (SI) input.

主权项

1. A memory device comprising:
a memory array; a serial interface controller having a serial data in (SI) input configured to receive a signal from a master device; and a register separate from and directly coupled to the serial interface controller via a data line, wherein the register is configured to enable or disable access to a portion of the memory array when data indicating whether to enable or disable access to the portion is written into the register via the SI input and the data line, wherein the portion of the memory array is configured to store an indication of the data indicating whether to enable or disable access to the portion of the memory array.