A25L80P
Read Device Identification (RDID)
The Read Identification (RDID) instruction allows the 8-bit
manufacturer identification code to be read, followed by two
bytes of device identification. The manufacturer identification is
assigned by JEDEC, and has the value 37h, plus the
continuation identification for AMIC Technology. The device
identification is assigned by the device manufacturer, and
indicates the memory in the first bytes (02h), and the memory
capacity of the device in the second byte (13h).
This is followed by the 32-bit device identification, stored in the
memory, being shifted out on Serial Data Output (Q), each bit
being shifted out during the falling edge of Serial Clock (C).
The instruction sequence is shown in Figure 14. The Read
Identification (RDID) instruction is terminated by driving Chip
S
Select ( ) High at any time during data output.
S
When Chip Select ( ) is driven High, the device is put in the
Any Read Identification (RDID) instruction while an Erase, or
Program cycle is in progress, is not decoded, and has no effect
on the cycle that is in progress.
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.
S
The device is first selected by driving Chip Select ( ) Low.
Then, the 8-bit instruction code for the instruction is shifted in.
Table. Read Identification (READ_ID) Data-Out Sequence
Manufacture Identification
Device Identification
Continuation ID
7Fh
Manufacture ID
37h
Memory Type
Memory Capacity
13h
02h
Figure 14. Read Identification (RDID) Data-Out Sequence
S
0
1
2
3
4
5
6
7
8
9
10
13 14 15 16 17 18
21 22 23 24 25 26
29 30 31 32 33 34
37 38 39
C
Instruction
D
Q
31
29
26
24 23
21
22
18
16 15 14 13
10
9
8
7
6
5
2
1
0
30
25
17
High Impedance
Continuation ID
Manufacture ID
Memory Type
Device ID
PRELIMINARY (May 2005, Version 0.0)
19
AMIC Technology Corp.
AMICC [ AMIC TECHNOLOGY ]
