Rainbow Electronics AT45DB041D - Manual (Page 25)

25
3595R–DFLASH–11/2012
AT45DB041D
14.1 Manufacturer and Device ID Information
Note: Based on JEDEC publication 106 (JEP106), Manufacturer ID data can be comprised of any number of bytes. Some manufactur-
ers may have Manufacturer ID codes that are two, three or even four bytes long with the first byte(s) in the sequence being 7FH.
A system should detect code 7FH as a “Continuation Code” and continue to read Manufacturer ID bytes. The first non-7FH byte
would signify the last byte of Manufacturer ID data. For Adesto (and some other manufacturers), the Manufacturer ID data is
comprised of only one byte.
14.1.1 Byte 1 – Manufacturer ID
Hex
Value
JEDEC Assigned Code
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
1FH 0 0 0 1 1 1 1 1 Manufacturer ID 1FH = Adesto
14.1.2 Byte 2 – Device ID (Part 1)
Hex
Value
Family Code Density Code
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Family Code 001 = DataFlash
24H 0 0 1 0 0 1 0 0 Density Code 00100 = 4-Mbit
14.1.3 Byte 3 – Device ID (Part 2)
Hex
Value
MLC Code Product Version Code
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 MLC Code 000 = 1-bit/Cell Technology
00H 0 0 0 0 0 0 0 0 Product Version 00000 = Initial Version
14.1.4 Byte 4 – Extended Device Information String Length
Hex
Value
Byte Count
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
00H 0 0 0 0 0 0 0 0 Byte Count 00H = 0 Bytes of Information
9FH
Manufacturer ID
Byte n
Device ID
Byte 1
Device ID
Byte 2
This information would only be output
if the Extended Device Information String Length
value was something other than 00H.
Extended
Device
Information
String Length
Extended
Device
Information
Byte x
Extended
Device
Information
Byte x + 1
CS
1FH 23H 00H 00H Data Data
SI
SO
Opcode
Each transition
represents 8 bits