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NX25F011B View Datasheet(PDF) - Unspecified

Part NameDescriptionManufacturer
NX25F011B 1M-BIT, 2M-BIT, AND 4M-BIT SERIAL FLASH MEMORIES WITH 4-PIN SPI INTERFACE ETC1
Unspecified 
NX25F011B Datasheet PDF : 37 Pages
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NX25F011B
NX25F021B
NX25F041B
Transfer Sector to SRAM Clocked (54H)
The Transfer Sector to SRAM Clocked command (54H)
allows the contents of a sector to be transferred directly to
the SRAM without having to read the sector out of the device
and rewrite it into the SRAM. The command is similar to the
Write to Sector command except that instead of inputting
data from the SI pin, the data is taken from the specified
sector and is transferred to the SRAM. Every eight clocks
on SCK, a byte from the specified sector to the SRAM will
be transferred. Although data on SI is ignored, it is recom-
mended to write data bytes of 00H in order to support the
clocking requirements. During the transfer, the SO output is
in a high-impedance state. When the last byte address is
transferred, the command can be completed by issuing
eight more control clocks and asserting CS high. If the clock
continues to increment past the highest byte-address
(107H), the address counter will roll over to byte-0H. This
command can also be used to load partial sectors into
SRAM
Transfer Sector
to SRAM
Sector
Command Address*
SI
54H
S[15:0]
Byte
Address**
B[15:0]
8 Clocks per Byte Trasnfered
from First Byte to Last Byte
SI=00H During Byte Ttansfers
SO
*The sector address only uses bits [8:0], [9:0] or [10:0] Depending on device density
**The byte address only uses bits [8:0]
8 Clocks
00H
Compare Sector to SRAM Clocked (86H)
The Compare Sector to SRAM command does a bit-by-bit
comparison of the data stored in the addressed sector
against data in the SRAM. The command is similar to the
Read from Sector command except that data is not read out
of the Serial Output pin (SO). Instead, the SO pin provides
a bit-by-bit compare of each sector and SRAM bit. A high (1)
per bit will be output if the bit compare is equal. A low (0) per
bit will be output if the bit compare is not equal. The compare
can start from any location in the 264-byte range as
specified by the byte-address field B[15:0]. The
byte-address counter is automatically incremented and will
wrap around to the first address (0H) if it passes the last
address (107H). If any of the compared bits are not equal,
then the Compare Not Equal (CNE) bit in the Status Register
is set to a 1. This bit will stay set until a Clear Compare
Status command has been issued. This command can also
be used to load partial sectors into SRAM
Compare Sector
with SRAM Sector
Command Address*
SI
86H
S[15:0]
Byte
Address**
B[15:0]
16 Clocks
0000H
SO
RB[15:0]
First Byte - Last Byte
Read/Busy
Status
Bit Compare of Sector
and SRAM
*The sector address only uses bits [8:0], [9:0] or [10:0] Depending on device density
**The byte address only uses bits [8:0]
28
NexFlash Technologies, Inc.
PRELIMINARY NXSF016F-1201
12/12/01 ©
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