M25PX16 Serial Flash Embedded Memory
DUAL INPUT FAST PROGRAM
DUAL INPUT FAST PROGRAM
The DUAL INPUT FAST PROGRAM command is similar to the PAGE PROGRAM com-
mand, except that data is entered on two pins (DQ0 and DQ1) instead of one, doubling
the data transfer bandwidth.
The DUAL INPUT FAST PROGRAM command is entered by driving Chip Select S# LOW,
followed by the command code, three address bytes, and at least one data byte on serial
data input (DQ0).
If the eight least significant address bits (A7-A0) are not all zero, all transmitted data that
goes beyond the end of the current page is programmed from the start address of the
same page; that is, from the address whose eight least significant bits (A7-A0) are all
zero. S# must be driven LOW for the entire duration of the sequence.
If more than 256 bytes are sent to the device, previously latched data is discarded and
the last 256 data bytes are guaranteed to be programmed correctly within the same
page. If less than 256 data bytes are sent to device, they are correctly programmed at the
requested addresses without any effect on other bytes in the same page.
For optimized timings, it is recommended to use the DUAL INPUT FAST PROGRAM
command to program all consecutive targeted bytes in a single sequence than to use
several DUAL INPUT FAST PROGRAM sequences, each containing only a few bytes.
S# must be driven HIGH after the eighth bit of the last data byte has been latched in.
Otherwise the DUAL INPUT FAST PROGRAM command is not executed.
As soon as S# is driven HIGH, the self-timed PAGE PROGRAM cycle is initiated; the cy-
cle's duration is tPP. While the DUAL INPUT FAST PROGRAM cycle is in progress, the
status register may be read to check the value of the write In progress (WIP) bit. The
WIP bit is 1 during the self-timed PAGE PROGRAM cycle, and 0 when the cycle is com-
pleted. At some unspecified time before the cycle is completed, the write enable latch
(WEL) bit is reset.
A DUAL INPUT FAST PROGRAM command is not executed if it applies to a page protec-
ted by the block protect bits BP2, BP1, and BP0.
Figure 20: DUAL INPUT FAST PROGRAM Command Sequence
0
7
8
C
x
C
LSB
A[MIN]
LSB
D
D
D
D
D
D
D
D
D
D
DQ0
Command
IN
IN
IN
IN
IN
MSB
A[MAX]
High-Z
DQ1
IN
IN
IN
IN
IN
MSB
1. For the M25PX16, the DUAL INPUT FAST PROGRAM command is available only in VCC
range 2.7 V - 3.6 V.
Notes:
2. Cx = 7 + (A[MAX] + 1).
PDF: 09005aef845665a5
m25px16.pdf - Rev. A 11/12 EN
Micron Technology, Inc. reserves the right to change products or specifications without notice.
32
© 2012 Micron Technology, Inc. All rights reserved.
MICRON [ MICRON TECHNOLOGY ]
