ACE25C400 Datasheet, PDF (22/31 Pages) ACE Technology Co., LTD. – 4MB Serial Flash Memory

ACE25C400
4MB Serial Flash Memory
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 ACE25C400 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.
VER 1.2 22