ACE25AB400G

Serial NOR Flash Memory 4M bits 3.0V Dual I/O Serial Flash Memory with 4KB Uniform Sector

VER 1.1

20

Read Manufacture ID/ Device ID (REMS) (90H)

The Read Manufacturer/Device ID command is for reading both the JEDEC assigned Manufacturer ID

and the specific Device ID. The command is initiated by driving the CS# pin low and shifting the command

code “90H” followed by a 24-bit address (A23-A0) of 000000H. After which, the Manufacturer ID and the

Device ID are shifted out on the falling edge of SCLK with most significant bit (MSB) first as shown in

Figure17. If the 24-bit address is initially set to 000001H, the Device ID will be read first

.

Figure17. Read Sequence Diagram

Figure15. Release Power-Down Sequence Diagram

Figure16. Release Power-Down /Read Device ID Sequence Diagram