S25FL512SAGBHI313 Datasheet, PDF (78/140 Pages) SPANSION – 512 Mbit (64 Mbyte) MirrorBit® Flash Non-Volatile Memory CMOS 3.0 Volt Core with Versatile I/O Serial Peripheral Interface with Multi-I/O

Data Sheet
10.2.2
Read Identification (RDID 9Fh):
The Read Identification (RDID) command provides read access to manufacturer identification, device
identification, and Common Flash Interface (CFI) information. The manufacturer identification is assigned by
JEDEC. The CFI structure is defined by JEDEC standard. The device identification and CFI values are
assigned by Spansion.
The JEDEC Common Flash Interface (CFI) specification defines a device information structure, which allows
a vendor-specified software flash management program (driver) to be used for entire families of flash devices.
Software support can then be device-independent, JEDEC manufacturer ID independent, forward and
backward-compatible for the specified flash device families. System vendors can standardize their flash
drivers for long-term software compatibility by using the CFI values to configure a family driver from the CFI
information of the device in use.
Any RDID command issued while a program, erase, or write cycle is in progress is ignored and has no effect
on execution of the program, erase, or write cycle that is in progress.
The RDID instruction is shifted on SI. After the last bit of the RDID instruction is shifted into the device, a byte
of manufacturer identification, two bytes of device identification, extended device identification, and CFI
information will be shifted sequentially out on SO. As a whole this information is referred to as ID-CFI. See ID-
CFI Address Space on page 54 for the detail description of the ID-CFI contents.
Continued shifting of output beyond the end of the defined ID-CFI address space will provide undefined data.
The RDID command sequence is terminated by driving CS# to the logic high state anytime during data
output.
The maximum clock frequency for the RDID command is 133 MHz.
Figure 10.2 Read Identification (RDID 9Fh) Command Sequence
CS#
SCK
SI
SO
Phase
76543210
7 6 5 43 2 1 0 7 6 5 4 3 2 1 0
Instruction
Data 1
Data N
10.2.3
Read Electronic Signature (RES) (ABh):
The RES command is used to read a single byte Electronic Signature from SO. RES is only supported for
backward compatibility and should not be used for new software designs. New software designs should
instead make use of the RDID command.
The RES instruction is shifted in followed by three dummy bytes onto SI. After the last bit of the three dummy
bytes are shifted into the device, a byte of Electronic Signature will be shifted out of SO. Each bit is shifted out
by the falling edge of SCK. The maximum clock frequency for the RES command is 50 MHz.
The Electronic Signature can be read repeatedly by applying multiples of eight clock cycles.
The RES command sequence is terminated by driving CS# to the logic high state anytime during data output.
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S25FL512S
S25FL512S_00_07 January 8, 2014