ACE25QC200GLTMTH datasheet(33/64 Pages) ACE

33 / 64 page

ACE25QC200GL

2M BIT SPI NOR FLASH

VER 1.1

Read Manufacturer / Device ID Quad I/O (94h)

The Read Manufacturer / Device ID Quad I/O instruction is an alternative to the Read Manufacturer /

Device ID instruction that provides both the JEDEC assigned manufacturer ID and the specific device ID at

4x speed.

The Read Manufacturer / Device ID Quad I/O instruction can operate at the highest possible frequency of

fC (see AC Electrical Characteristics). The instruction is initiated by driving the /CS pin low and shifting the

instruction code “94h” followed by a 24-bit address (A23-A0) and six clock dummy cycles, but with the

capability to input the Address bits four bits per clock. After which, the Manufacturer ID for (68h) and the

Device ID are shifted out four bits per clock on the falling edge of SCLK with most significant bit (MSB) first

as shown in Figure22. The Device ID values for the ACE25QC200GL are listed in Manufacturer and Device

Identification table. The address A23-A1 and M7-M0 is an unrelated item and has no effect on the result of

the instruction. At the same time, if the A0 is initially set to 1 the Device ID will be read first and then

followed by the Manufacturer ID. If the A0 is initially set to 0 the Manufacturer ID will be read first and then

followed by the Device ID. The Manufacturer and Device IDs can be read continuously, alternating from

one to the other. The instruction is completed by driving /CS high.

Figure22. Read Manufacturer / Device ID Quad I/O Instruction

ACE25QC200GLTMTH Datasheet(PDF) 33 Page - ACE Technology Co., LTD.