Rainbow Electronics AT45DB081D - Manual (Page 25)

25
3596N–DFLASH–11/2012
AT45DB081D
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 manufacturers 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
25H 0 0 1 0 0 1 0 1 Density Code 00101 = 8-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 25H 00H 00H Data Data
SI
SO
Opcode
Each transition
represents 8 bits