S25FL128S Datasheet, PDF (94/153 Pages) SPANSION – MirrorBit® Flash Non-Volatile Memory CMOS 3.0 Volt Core with Versatile I/O Serial Peripheral Interface with Multi-I/O

Data Sheet
10.4.2
Fast Read (FAST_READ 0Bh or 4FAST_READ 0Ch)
The instruction
 0Bh (ExtAdd=0) is followed by a 3-byte address (A23-A0) or
 0Bh (ExtAdd=1) is followed by a 4-byte address (A31-A0) or
 0Ch is followed by a 4-byte address (A31-A0)
The address is followed by zero or eight dummy cycles depending on the latency code set in the
Configuration Register. The dummy cycles allow the device internal circuits additional time for accessing the
initial address location. During the dummy cycles the data value on SO is “don’t care” and may be high
impedance. Then the memory contents, at the address given, are shifted out on SO.
The maximum operating clock frequency for FAST READ command is 133 MHz.
The address can start at any byte location of the memory array. The address is automatically incremented to
the next higher address in sequential order after each byte of data is shifted out. The entire memory can
therefore be read out with one single read instruction and address 000000h provided. When the highest
address is reached, the address counter will wrap around and roll back to 000000h, allowing the read
sequence to be continued indefinitely.
Figure 10.24 Fast Read (FAST_READ) Command Sequence
(3-byte Address, 0Bh [ExtAdd=0, LC=10b])
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 40 41 42 43 44 45 46 47
Instruction
High Impedance
24-Bit
Address
Dummy Byte
23 22 21
321076543210
DATA OUT 1
DATA OUT 2
7 654 32 107
MSB
MSB
Figure 10.25 Fast Read Command Sequence (4-byte Address, 0Ch or 0B [ExtAdd=1], LC=10b)
CS#
SCK
SI
SO
0 1 2 3 4 5 6 7 8 9 10 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55
Instruction
High Impedance
32-Bit
Address
Dummy Byte
31 30 29
321 0 76543210
DATA OUT 1
DATA OUT 2
7 654 32 107
MSB
MSB
CS#
SCLK
SI
SO
Figure 10.26 Fast Read Command Sequence (4-byte Address, 0Ch or 0B [ExtAdd=1], LC=11b)
012345678
38 39 40 41 42 43 44 45 46 47 48 49
Instruction
32 Bit Address
7 6 5 4 3 2 1 0 31
10
Data 1
Data 2
7654321076
94
S25FL128S and S25FL256S
S25FL128S_256S_00_05 July 12, 2012