MB85RS4MTYCOMMANDWREN The WREN command sets WEL (Write Enable Latch) bit to 1. WEL has to be set with the WREN command before writing operation (WRSR command, WRITE command, WRSN command and SSWR command) . CS 0 1 2 3 4 5 6 7 SCK SI Invalid 0 0 0 0 0 1 1 0 Invalid High-Z SO WRDI The WRDI command resets WEL (Write Enable Latch) bit to 0. Writing operation (WRSR command, WRITE command, WRSN command and SSWR command) are not performed when WEL is reset. CS 0 1 2 3 4 5 6 7 SCK SI Invalid 0 0 0 0 0 1 0 0 Invalid High-Z SO 8 DS501-00065-0v1-E Document Outline DESCRIPTION FEATURES PIN ASSIGNMENT PIN FUNCTIONAL DESCRIPTIONS BLOCK DIAGRAM SPI MODE SERIAL PERIPHERAL INTERFACE (SPI) STATUS REGISTER OP-CODE COMMAND BLOCK PROTECT WRITING PROTECT ABSOLUTE MAXIMUM RATINGS RECOMMENDED OPERATING CONDITIONS ELECTRICAL CHARACTERISTICS 1. DC Characteristics 2. AC Characteristics 3. Pin Capacitance TIMING DIAGRAM POWER ON/OFF SEQUENCE FRAM CHARACTERISTICS NOTE ON USE ESD AND LATCH-UP REFLOW CONDITIONS AND FLOOR LIFE Current status on Contained Restricted Substances ORDERING INFORMATION PACKAGE DIMENSION MARKING (Example) PACKING INFORMATION 1. Tube 2. Emboss Tape
