A25LS512A datasheet(25/43 Pages) AMICC

25 / 43 page

A25LS512A Series

(November, 2014, Version 1.1)

AMIC Technology Corp.

Read Electronic Manufacturer ID & Device ID (REMS)

The Read Electronic Manufacturer ID & Device ID (REMS)

instruction allows the 8-bit manufacturer identification code to

be read, followed by one byte of device identification. The

manufacturer identification is assigned by JEDEC, and has

the value 37h for AMIC. The device identification is assigned

by the device manufacturer.

Any Read Electronic Manufacturer ID & Device ID (REMS)

instruction while an Erase, or Program cycle is in progress, is

not decoded, and has no effect on the cycle that is in

progress.

The device is first selected by driving Chip Select ( S ) Low.

The 8-bit instruction code is followed by 2 dummy bytes and

one byte address (A7~A0), each bit being latched-in on Serial

Data Input (DIO) during the rising edge of Serial Clock (C).

If the one-byte address is set to 01h, then the device ID will

be read first and then followed by the Manufacturer ID. On

the other hand, if the one-byte address is set to 00h, then the

Manufacturer ID will be read first and then followed by the

device ID.

The instruction sequence is shown in Figure 18. The Read

Electronic Manufacturer ID & Device ID (REMS) instruction is

terminated by driving Chip Select ( S ) High at any time during

data output.

When Chip Select ( S ) is driven High, the device is put in the

Stand-by Power mode. Once in the Stand-by Power mode,

the device waits to be selected, so that it can receive, decode

and execute instructions.

Table 7. Read Electronic Manufacturer ID & Device ID (REMS) Data-Out Sequence

Manufacture Identification

Device Identification

C2h

05h

Figure 18. Read Electronic Manufacturer ID & Device ID (REMS) Instruction Sequence and Data-Out Sequence

Instruction

High Impedance

MSB

810

0 1 234 5 6 7

2 Dummy Bytes

20 21 22 23

15 14 13

3 21 0

Manufacturer ID

DIO

24 25 26 27 28 29 30 31

65 4

32 33 34 35 36 37 38 39

ADD(1)

MSB

7 6 54 32 1

MSB

7 6 54 32 1 0

40 41 42 43 44 45 46 47

Device ID

Notes:

(1) ADD=00h will output the manufacturer ID first and ADD=01h will output device ID first

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