IS25CD010 Datasheet, PDF (10/40 Pages) List of Unclassifed Manufacturers – 512Kbit/1 Mbit / 2 Mbit Single Operating Voltage Serial Flash Memory

DEVICE OPERATION (CONTINUED)
IS25CD512/010 & IS25LD020
RDID COMMAND (READ PRODUCT IDENTIFICATION)
OPERATION
The Read Product Identification (RDID) instruction is for
reading out the old style of 8-bit Electronic Signature, whose
values are shown as table of ID Definitions. This is not same
as RDID or JEDEC ID instruction. It’s not recommended to
use for new design. For new design, please use RDID or
JEDEC ID instruction.
The RDES instruction code is followed by three dummy
bytes, each bit being latched-in on SI during the rising
edge of SCK. Then the Device ID is shifted out on SO
with the MSB first, each bit been shifted out during the
falling edge of SCK. The RDES instruction is ended by
CE# goes high. The Device ID outputs repeatedly if
continuously send the additional clock cycles on SCK while
CE# is at low.
Table 11. Product Identification
Product Identification
Manufacturer ID
First Byte
Second Byte
Device ID:
Device ID 1
IS25CD512
05h
IS25CD010
10h
IS25LD020
11h
Data
9Dh
7Fh
Device ID 2
20h
21h
22h
Figure 3. Read Product Identification Sequence
CE#
01
78 9
31
38 39
46 47
54
SCK
INSTRUCTION 3 Dummy Bytes
SI
1010 1011b
HIGH IMPEDANCE
SO
Device ID1
Device ID1
Device ID1
Integrated Silicon Solution, Inc.- www.issi.com
Rev. C
10
08/12/2013