S25FL128R Meet Spansion Inc., S25FL128R Datasheet - Page 24

• Manufacturer Part Number: S25FL128R
• Description: 128 Megabit Cmos 3.0 Volt Flash Memory With 104-mhz Spi Serial Peripheral Interface Bus
• Manufacturer: Meet Spansion Inc.

24
11.3.2
Parallel Mode
In parallel mode, the maximum SCK clock frequency is 10 MHz. The device requires a single clock cycle
instead of eight clock cycles to access the next data byte. The method of memory content output will be the
same compared to the serial mode. The only difference is that a byte of data is output per clock cycle instead
of a single bit. In this case, the manufacturer identification will be output during the first byte cycle and the
device identification during the second and third byte cycles out of the PO7-PO0 serial output pins. To read ID
in parallel mode requires a Parallel Mode Entry command (55h) to be issued before the RDID command.
Once in the parallel mode, the flash memory will not exit parallel mode until a Parallel Mode Exit (45h)
command is given to the flash device, or upon power down/power up sequence.
Uniform 256 KB Sector
Uniform 64 KB Sector
Device
PO[7-0]
Figure 11.5 Parallel Read_ID Command Sequence and Data Out Sequence
SCK
CS#
SI
D a t a
Table 11.1 Manufacturer & Device Identification, RDID (9Fh)
Manufacturer Identification
S h e e t
Byte 0
01h
01h
0
S25FL128R
1
High Impedance
2
Instruction
( A d v a n c e
3
4
5
Byte 1
20h
20h
Device Identification
6
7
Byte
I n f o r m a t i o n )
Manufacturer/Device Identification
0
8
Byte
1
9
Byte 2
Byte
18h
18h
2
10
S25FL128R_00_02 December 1, 2009
Byte
3
11
Byte
4
12
Extended Device Identification
Byte 3
03h
03h
Byte 4
00h
01h