參數(shù)資料
型號(hào)： M25PE80-VMW6TP
廠商： 意法半導(dǎo)體
元件分類(lèi)： DRAM
英文描述： 4 Mbit Uniform Sector, Serial Flash Memory
中文描述： 4兆位統(tǒng)一部門(mén)，串行閃存
文件頁(yè)數(shù)： 22/43頁(yè)
文件大?。?/td> 599K
代理商： M25PE80-VMW6TP
M25PE80
22/43
Page Program (PP)
The Page Program (PP) instruction allows Bytes
to be programmed in the memory (changing bits
from 1 to 0, only). Before it can be accepted, a
Write Enable (WREN) instruction must previously
have been executed. After the Write Enable
(WREN) instruction has been decoded, the device
sets the Write Enable Latch (WEL).
The Page Program (PP) instruction is entered by
driving Chip Select (S) Low, followed by the in-
struction code, three address Bytes and at least
one data Byte on Serial Data Input (D). If the 8
least significant address bits (A7-A0) are not all
zero, all transmitted data exceeding the ad-
dressed page boundary roll over, and are pro-
grammed from the start address of the same page
(the one whose 8 least significant address bits
(A7-A0) are all zero). Chip Select (S) must be driv-
en Low for the entire duration of the sequence.
The instruction sequence is shown in
Figure 16.
If more than 256 Bytes are sent to the device, pre-
viously latched data are discarded and the last 256
data Bytes are guaranteed to be programmed cor-
rectly within the same page. If less than 256 Data
Bytes are sent to device, they are correctly pro-
grammed at the requested addresses without hav-
ing any effects on the other Bytes of the same
page.
For optimized timings, it is recommended to use
the Page Program (PP) instruction to program all
consecutive targeted Bytes in a single sequence
versus using several Page Program (PP) se-
quences with each containing only a few Bytes
(see
Table 16., AC Characteristics
).
Chip Select (S) must be driven High after the
eighth bit of the last data Byte has been latched in,
otherwise the Page Program (PP) instruction is not
executed.
As soon as Chip Select (S) is driven High, the self-
timed Page Program cycle (whose duration is t
PP
)
is initiated. While the Page Program cycle is in
progress, the Status Register may be read to
check the value of the Write In Progress (WIP) bit.
The Write In Progress (WIP) bit is 1 during the self-
timed Page Program cycle, and is 0 when it is
completed. At some unspecified time before the
cycle is complete, the Write Enable Latch (WEL)
bit is reset.
A Page Program (PP) instruction applied to a page
that is Hardware or software Protected is not exe-
cuted.
Any Page Program (PP) instruction, while an
Erase, Program or Write cycle is in progress, is re-
jected without having any effects on the cycle that
is in progress.
Figure 16. Page Program (PP) Instruction Sequence
Note: 1. Address bits A23 to A19 are Don’t Care
2. 1
≤
n
≤
256
C
D
AI04044
S
42
41
43 44 45 46 47 48 49 50
52 53 54 55
40
C
D
S
23
2
1
3
4
5
6
7
8
9 10
28 29 30 31 32 33 34 35
22 21
3
2
1
0
36 37 38
Instruction
24-Bit Address
0
7
6
5
4
3
2
0
1
Data Byte 1
39
51
7
6
5
4
3
2
0
1
Data Byte 2
7
6
5
4
3
2
0
1
Data Byte 3
Data Byte n
7
6
5
4
3
2
0
1
MSB
MSB
MSB
MSB
MSB
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