ES25P80 Datasheet, PDF (17/35 Pages) Excel Semiconductor Inc. – 8Mbit CMOS 3.0 Volt Flash Memory with 75Mhz SPI Bus Interface

ADVANCED INFORMATION
EE SS II
Excel Semiconductor inc.
CS#
SCK
SI
SO
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
28 29 30 31
Instruction
10011 111
High Impedance
Manufacturer Identification Device Identification
MSB
15 14 13
210
Figure 11. Read Identification (RDID) Instruction Sequence and Data-Out Sequence
Read Manufacturer ID & Device ID
(RDMD)
The Read Manufacturer ID & Device ID (RDMD)
instruction is an alternative to the Release from
Power-down/Device ID instruction that provides both
the JEDEC assigned manufacturer ID and the spe-
cific device ID.
The Read Manufacturer ID & Device ID (RDMD)
instruction is very similar to the Release from Power-
down/Device ID instruction.
The instruction is initiated by driving the CS# pin low
and shift the instruction code “90h” followed by three
dummy bytes. After which, the Manufacturer ID for
ESI (4Ah) and the Device ID (13h) are shifted out on
the falling edge SCLK with most significant bit (MSB)
first as shown in Figure 12. The Manufacturer and
Device IDs can be read continuously, alternating
from one to the other. The instruction is completed
by driving CS# pin.
CS#
SCK
SI
SO
0 1 2 3 4 5 6 7 8 9 10
28 29 30 31 32 33 34 35 36 37 38 39
Instruction
3 Dummy bytes
1 0 0 1 0 0 0 0 23 22 21
MSB
High Impedance
3210
Manufacturer ID
Device ID
7 6 5 43 2 1 07
MSB
Figure 12. Read Manufacturer ID & Device ID (RDMD) Instruction Sequence and
Data-Out Sequence
ES25P80
17
Rev. 0D May, 11, 2006