S25FL128P0XMFI011 Spansion Inc., S25FL128P0XMFI011 Datasheet - Page 22

• Manufacturer Part Number: S25FL128P0XMFI011
• Description: IC 128M CMOS 3V/104MHZ SPI BUS INTERFACE
• Manufacturer: Spansion Inc.

11.3
22
11.3.1
Read Identification (RDID: 9Fh)
Serial Mode
The Read Identification (RDID) instruction opcode allows the 8-bit manufacturer identification to be read,
follow by two bytes of device identification. The manufacturer identification is assigned by JEDEC. The device
identification is assigned by the device manufacturer.
Any Read Identification (RDID) instruction opcode issued while a program, erase, or write cycle is in progress
is not decoded and has no effect on execution of the program, erase, or write cycle that is in progress.
The device is first selected by driving the CS# chip select input pin to the logic low state. After this, the RDID
8-bit instruction opcode is shifted in onto the SI serial input pin. After the last bit of the RDID instruction
opcode is shifted into the device, a byte of manufacturer identification, two bytes of device identification and
two bytes of extended device identification will be shifted sequentially out of the SO serial output pin. Each bit
is shifted out during the falling edge of the SCK serial clock signal. The maximum clock frequency for the
RDID (9Fh) command is at 40MHz (Normal Read).
The Read Identification (RDID) instruction sequence is terminated by driving the CS# chip select input pin to
the logic high state anytime during data output. After issuing any Read ID instruction opcodes (90h, 9Fh,
ABh), driving the CS# chip select input pin to the logic high state will automatically send the device into the
standby mode. Driving the CS# chip select input pin to the logic low state again will automatically send the
device out of the standby mode and into the active mode.
SCK
CS#
SO
SI
Figure 11.4 Read Identification Command Sequence and Data Out Sequence
0
High Impedance
1
2
Instruction
D a t a
3
4
5
S25FL128P
S h e e t
6
7
MSB
23
Manufacturer / Device Identification
8
22
9
( P r e l i m i n a r y )
21
10
3
28
2
29
1
30
0
31
MSB
15
32
Extended Device Identification
S25FL128P_00_04 July 2, 2007
14
33
13
34
3
44
2
45
1
46
0
47