ACE25C200

2MB Serial Flash Memory

VER 1.2

23

The Manufacturer and Device IDs can be read continuously, alternating from one to the other. The

instruction is completed by driving CS# high.

Figure 21 Read manufacturer / device ID instruction

Read JEDEC ID (9Fh)

For compatibility reasons, the ACE25C200 provides several instructions to electronically determine

the identity of the device. The Read JEDEC ID instruction is compatible with the JEDEC standard for

SPI compatible serial memories. The instruction is initiated by driving the CS# pin low and shifting the

instruction code “9Fh”. The JEDEC assigned Manufacturer ID byte for ACE Technology Co., LTD.

(A1h) and two Device ID bytes, Memory Type (ID15-ID8) and Capacity ID7-D0 are then shifted out on

the falling edge of CLK with most significant bit (MSB) first as shown in Figure 22 . For memory type

and capacity values refer to Table 3 Manufacturer and Device Identification table.