<s>
MicroPython	B-Language
is	O
a	O
software	O
implementation	O
of	O
a	O
programming	O
language	O
largely	O
compatible	O
with	O
Python	B-Language
3	O
,	O
written	O
in	O
C	B-Language
,	O
that	O
is	O
optimized	O
to	O
run	O
on	O
a	O
microcontroller	B-Architecture
.	O
</s>
<s>
MicroPython	B-Language
consists	O
of	O
a	O
Python	B-Language
compiler	B-Language
to	O
bytecode	O
and	O
a	O
runtime	B-Application
interpreter	I-Application
of	O
that	O
bytecode	O
.	O
</s>
<s>
The	O
user	O
is	O
presented	O
with	O
an	O
interactive	O
prompt	O
(	O
the	O
REPL	B-Application
)	O
to	O
execute	O
supported	O
commands	O
immediately	O
.	O
</s>
<s>
Included	O
are	O
a	O
selection	O
of	O
core	O
Python	B-Language
libraries	O
;	O
MicroPython	B-Language
includes	O
modules	B-Device
which	O
give	O
the	O
programmer	O
access	O
to	O
low-level	O
hardware	O
.	O
</s>
<s>
MicroPython	B-Language
does	O
have	O
an	O
inline	B-Language
assembler	I-Language
,	O
and	O
that	O
code	O
will	O
run	O
at	O
full	O
speed	O
,	O
but	O
it	O
's	O
non-portable	O
across	O
different	O
microcontrollers	B-Architecture
(	O
as	O
any	O
assembly	O
is	O
)	O
.	O
</s>
<s>
The	O
source	O
code	O
for	O
the	O
project	O
is	O
available	O
on	O
GitHub	B-Application
under	O
the	B-License
MIT	I-License
License	I-License
.	O
</s>
<s>
MicroPython	B-Language
was	O
originally	O
created	O
by	O
the	O
Australian	O
programmer	O
and	O
theoretical	O
physicist	O
Damien	O
George	O
,	O
after	O
a	O
successful	O
Kickstarter	O
backed	O
campaign	O
in	O
2013	O
.	O
</s>
<s>
While	O
the	O
original	O
Kickstarter	O
campaign	O
released	O
MicroPython	B-Language
with	O
an	O
STM32F4-powered	O
development	O
board	O
"	O
pyboard	O
"	O
,	O
MicroPython	B-Language
supports	O
a	O
number	O
of	O
ARM	B-Architecture
based	O
architectures	O
.	O
</s>
<s>
The	O
ports	O
supported	O
in	O
the	O
mainline	O
are	O
ARM	B-Architecture
Cortex-M	O
(	O
many	O
STM32	O
boards	O
,	O
TI	O
CC3200/WiPy	O
,	O
Teensy	O
boards	O
,	O
Nordic	O
nRF	O
series	O
,	O
SAMD21	O
and	O
SAMD51	O
)	O
,	O
ESP8266	B-Device
,	O
ESP32	B-Device
,	O
16-bit	O
PIC	B-Architecture
,	O
Unix	B-Application
,	O
Windows	O
,	O
Zephyr	B-Application
,	O
and	O
JavaScript	B-Language
.	O
</s>
<s>
In	O
2016	O
,	O
a	O
version	O
of	O
MicroPython	B-Language
for	O
the	O
BBC	O
Micro	O
Bit	O
was	O
created	O
as	O
part	O
of	O
the	O
Python	B-Application
Software	I-Application
Foundation	I-Application
's	O
contribution	O
to	O
the	O
Micro	O
Bit	O
partnership	O
with	O
the	O
BBC	O
.	O
</s>
<s>
In	O
July	O
2017	O
,	O
MicroPython	B-Language
was	O
forked	O
to	O
create	O
CircuitPython	B-Device
,	O
a	O
version	O
of	O
MicroPython	B-Language
with	O
emphasis	O
on	O
education	O
and	O
ease	O
of	O
use	O
.	O
</s>
<s>
MicroPython	B-Language
and	O
CircuitPython	B-Device
support	O
somewhat	O
different	O
sets	O
of	O
hardware	O
(	O
e.g.	O
</s>
<s>
CircuitPython	B-Device
supports	O
Atmel	O
SAM	O
D21	O
and	O
D51	O
boards	O
,	O
but	O
dropped	O
support	O
for	O
ESP8266	B-Device
)	O
.	O
</s>
<s>
As	O
of	O
version	O
4.0	O
,	O
CircuitPython	B-Device
is	O
based	O
on	O
MicroPython	B-Language
version	O
1.9.4	O
.	O
</s>
<s>
In	O
2017	O
,	O
Microsemi	O
made	O
a	O
MicroPython	B-Language
port	O
for	O
RISC-V	B-Device
(	O
RV32	O
and	O
RV64	O
)	O
architecture	O
.	O
</s>
<s>
In	O
April	O
2019	O
,	O
a	O
version	O
of	O
MicroPython	B-Language
for	O
the	O
Lego	B-Application
Mindstorms	I-Application
EV3	I-Application
was	O
created	O
.	O
</s>
<s>
In	O
January	O
2021	O
,	O
a	O
MicroPython	B-Language
port	O
for	O
the	O
RP2040	O
(	O
ARM	B-Architecture
Cortex-M0	O
+	O
,	O
on	O
Raspberry	O
Pi	O
Pico	O
and	O
others	O
)	O
was	O
created	O
.	O
</s>
<s>
MicroPython	B-Language
has	O
the	O
ability	O
to	O
run	O
Python	B-Language
,	O
allowing	O
users	O
to	O
create	O
simple	O
and	O
easy-to-understand	O
programs	O
.	O
</s>
<s>
MicroPython	B-Language
supports	O
many	O
standard	O
Python	B-Language
libraries	O
,	O
supporting	O
more	O
than	O
80%	O
of	O
the	O
features	O
of	O
Python	B-Language
's	O
most	O
used	O
libraries	O
.	O
</s>
<s>
MicroPython	B-Language
was	O
designed	O
specifically	O
to	O
support	O
the	O
typical	O
performance	O
gap	O
between	O
microcontrollers	B-Architecture
and	O
Python	B-Language
.	O
</s>
<s>
Python	B-Language
code	I-Language
is	O
able	O
to	O
directly	O
access	O
and	O
interact	O
with	O
hardware	O
,	O
with	O
increased	O
hardware	O
possibilities	O
that	O
are	O
not	O
available	O
using	O
a	O
normal	O
Python	B-Language
application	B-Application
that	O
is	O
run	O
on	O
an	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
MicroPython	B-Language
's	O
utilisation	O
of	O
hardware	B-Operating_System
abstraction	I-Operating_System
layer	I-Operating_System
(	O
HAL	O
)	O
technology	O
allows	O
developed	O
code	O
to	O
be	O
portable	O
among	O
different	O
microcontrollers	B-Architecture
within	O
the	O
same	O
family	O
or	O
platform	O
and	O
on	O
devices	O
that	O
support	O
and	O
can	O
download	O
MicroPython	B-Language
.	O
</s>
<s>
Programs	O
are	O
often	O
developed	O
and	O
tested	O
on	O
high-performance	O
microcontrollers	B-Architecture
and	O
distributed	O
with	O
the	O
final	O
application	B-Application
used	O
on	O
lower-performance	O
microcontrollers	B-Architecture
.	O
</s>
<s>
MicroPython	B-Language
offers	O
functionality	O
,	O
once	O
new	O
code	O
has	O
been	O
written	O
,	O
to	O
create	O
a	O
frozen	O
module	O
and	O
use	O
it	O
as	O
a	O
library	O
which	O
can	O
be	O
a	O
part	O
of	O
developed	O
firmware	B-Application
.	O
</s>
<s>
This	O
feature	O
assists	O
with	O
avoiding	O
repetitive	O
downloading	O
of	O
the	O
same	O
,	O
already	O
error-free	O
,	O
tested	O
code	O
into	O
a	O
MicroPython	B-Language
environment	O
.	O
</s>
<s>
This	O
type	O
of	O
module	O
will	O
be	O
saved	O
to	O
a	O
microcontroller	B-Architecture
's	O
modules	B-Device
directory	O
for	O
compiling	B-Language
and	O
uploading	O
to	O
the	O
microcontroller	B-Architecture
where	O
the	O
library	O
will	O
be	O
available	O
using	O
Python	B-Language
's	O
import	O
command	O
to	O
be	O
used	O
repeatedly	O
.	O
</s>
<s>
The	O
read	B-Application
–	I-Application
eval	I-Application
–	I-Application
print	I-Application
loop	I-Application
(	O
REPL	B-Application
)	O
allows	O
a	O
developer	O
to	O
enter	O
individual	O
lines	O
of	O
code	O
and	O
have	O
them	O
run	O
immediately	O
on	O
a	O
terminal	B-Application
.	O
</s>
<s>
Linux-based	O
and	O
macOS	B-Application
systems	O
have	O
terminal	B-Application
emulators	I-Application
that	O
can	O
be	O
used	O
to	O
create	O
a	O
direct	O
connection	O
to	O
a	O
MicroPython	B-Language
device	O
's	O
REPL	B-Application
using	O
a	O
serial	O
USB	B-Protocol
connection	O
.	O
</s>
<s>
The	O
REPL	B-Application
assists	O
with	O
the	O
immediate	O
testing	O
of	O
parts	O
of	O
an	O
application	B-Application
as	O
you	O
can	O
run	O
each	O
part	O
of	O
the	O
code	O
and	O
visually	O
see	O
the	O
results	O
.	O
</s>
<s>
Once	O
different	O
parts	O
of	O
your	O
code	O
is	O
loaded	O
into	O
the	O
REPL	B-Application
you	O
can	O
use	O
additional	O
REPL	B-Application
features	O
to	O
experiment	O
with	O
your	O
code	O
's	O
functionality	O
.	O
</s>
<s>
Helpful	O
REPL	B-Application
commands	O
(	O
once	O
connected	O
to	O
a	O
serial	O
console	O
)	O
:	O
</s>
<s>
Although	O
MicroPython	B-Language
fully	O
implements	O
Python	B-Language
language	I-Language
version	O
3.4	O
and	O
much	O
of	O
3.5	O
,	O
it	O
does	O
not	O
implement	O
all	O
language	O
features	O
introduced	O
from	O
3.5	O
onwards	O
,	O
though	O
some	O
new	O
syntax	O
from	O
3.6	O
and	O
more	O
recent	O
features	O
from	O
later	O
versions	O
,	O
e.g.	O
</s>
<s>
MicroPython	B-Language
has	O
more	O
limited	O
hardware	O
support	O
in	O
the	O
microcontroller	B-Architecture
market	O
than	O
other	O
popular	O
platforms	O
,	O
like	O
Arduino	O
with	O
a	O
smaller	O
number	O
of	O
microcontroller	B-Architecture
choices	O
that	O
support	O
the	O
language	O
.	O
</s>
<s>
MicroPython	B-Language
does	O
not	O
include	O
an	O
integrated	B-Application
development	I-Application
environment	I-Application
(	O
IDE	O
)	O
or	O
specific	O
editor	O
unlike	O
other	O
platforms	O
.	O
</s>
<s>
MicroPython	B-Language
's	O
syntax	O
is	O
adopted	O
from	O
Python	B-Language
,	O
due	O
to	O
its	O
clear	O
and	O
easy-to-understand	O
style	O
and	O
power	O
.	O
</s>
<s>
MicroPython	B-Language
adopts	O
Python	B-Language
's	O
code	O
block	O
style	O
,	O
with	O
code	O
specific	O
to	O
a	O
particular	O
function	B-Language
,	O
condition	O
or	O
loop	O
being	O
indented	O
,	O
meaning	O
certain	O
expressions	O
will	O
only	O
be	O
evaluated	O
once	O
the	O
condition	O
expression	O
is	O
evaluated	O
correctly	O
.	O
</s>
<s>
This	O
assists	O
with	O
the	O
readability	O
of	O
MicroPython	B-Language
code	O
as	O
the	O
visual	O
structure	O
mirrors	O
the	O
semantic	O
structure	O
.	O
</s>
<s>
This	O
key	O
feature	O
is	O
simple	O
but	O
important	O
as	O
misused	O
indentation	O
can	O
result	O
in	O
code	O
executing	O
under	O
a	O
wrong	O
condition	O
or	O
an	O
overall	O
error	O
from	O
the	O
interpreter	B-Application
.	O
</s>
<s>
A	O
colon	O
(	O
:	O
)	O
is	O
the	O
key	O
symbol	O
used	O
to	O
indicate	O
the	O
ending	O
of	O
a	O
condition	O
statement	O
and	O
signals	O
to	O
the	O
interpreter	B-Application
that	O
the	O
statement	O
must	O
be	O
evaluated	O
and	O
the	O
indented	O
body	O
that	O
follows	O
to	O
be	O
executed	O
.	O
</s>
<s>
MicroPython	B-Language
has	O
the	O
ability	O
to	O
perform	O
various	O
mathematical	O
operations	O
using	O
primitive	O
and	O
logical	O
operations	O
.	O
</s>
<s>
MicroPython	B-Language
is	O
a	O
lean	O
and	O
efficient	O
implementation	O
of	O
Python	B-Language
with	O
libraries	O
similar	O
to	O
those	O
in	O
Python	B-Language
.	O
</s>
<s>
Some	O
standard	O
Python	B-Language
libraries	O
have	O
an	O
equivalent	O
library	O
in	O
MicroPython	B-Language
renamed	O
to	O
distinguish	O
between	O
the	O
two	O
.	O
</s>
<s>
MicroPython	B-Language
libraries	O
are	O
smaller	O
with	O
less	O
popular	O
features	O
removed	O
or	O
modified	O
to	O
save	O
memory	B-General_Concept
.	O
</s>
<s>
The	O
three	O
types	O
of	O
libraries	O
in	O
MicroPython	B-Language
:	O
</s>
<s>
MicroPython	B-Language
is	O
highly	O
customisable	O
and	O
configurable	O
,	O
with	O
language	O
differing	O
between	O
each	O
board	O
(	O
microcontroller	B-Architecture
)	O
and	O
the	O
availability	O
of	O
libraries	O
may	O
differ	O
.	O
</s>
<s>
When	O
developers	O
begin	O
to	O
create	O
a	O
new	O
application	B-Application
,	O
standard	O
MicroPython	B-Language
libraries	O
and	O
drivers	O
may	O
not	O
meet	O
the	O
requirements	O
,	O
with	O
insufficient	O
operations	O
or	O
calculations	O
.	O
</s>
<s>
Similar	O
to	O
Python	B-Language
,	O
there	O
is	O
the	O
possibility	O
of	O
extending	O
MicroPython	B-Language
's	O
functionality	O
with	O
custom	O
libraries	O
which	O
extend	O
the	O
ability	O
of	O
the	O
existing	O
libraries	O
and	O
firmware	B-Application
.	O
</s>
<s>
In	O
MicroPython	B-Language
,	O
files	O
ending	O
with	O
.py	B-Language
take	O
preference	O
over	O
other	O
library	O
aliases	O
which	O
allows	O
users	O
to	O
extend	O
the	O
use	O
and	O
implementation	O
of	O
the	O
existing	O
libraries	O
.	O
</s>
<s>
As	O
MicroPython	B-Language
's	O
implementation	O
and	O
popularity	O
continues	O
to	O
grow	O
,	O
more	O
boards	O
have	O
the	O
ability	O
to	O
run	O
MicroPython	B-Language
.	O
</s>
<s>
Many	O
developers	O
are	O
building	O
processor	O
specific	O
versions	O
that	O
can	O
be	O
downloaded	O
onto	O
different	O
microcontrollers	B-Architecture
.	O
</s>
<s>
Installing	O
MicroPython	B-Language
on	O
microcontrollers	B-Architecture
is	O
well	O
documented	O
and	O
user-friendly	O
.	O
</s>
<s>
MicroPython	B-Language
allows	O
interactions	O
between	O
microcontroller	B-Architecture
hardware	O
and	O
applications	O
to	O
be	O
simple	O
,	O
allowing	O
access	O
to	O
a	O
range	O
of	O
functionality	O
while	O
working	O
in	O
a	O
resource	O
constrained	O
environment	O
,	O
with	O
a	O
strong	O
level	O
of	O
responsiveness	O
.	O
</s>
<s>
The	O
two	O
types	O
of	O
boards	O
used	O
to	O
run	O
MicroPython	B-Language
:	O
</s>
<s>
MicroPython	B-Language
loaded	O
when	O
manufactured	O
,	O
meaning	O
only	O
MicroPython	B-Language
can	O
be	O
run	O
.	O
</s>
<s>
boards	O
that	O
have	O
firmware	B-Application
that	O
allows	O
MicroPython	B-Language
to	O
be	O
installed	O
to	O
the	O
board	O
.	O
</s>
<s>
To	O
move	O
a	O
program	O
onto	O
a	O
MicroPython	B-Language
board	O
,	O
create	O
a	O
file	O
and	O
copy	O
it	O
onto	O
the	O
microcontroller	B-Architecture
in	O
order	O
to	O
execute	O
.	O
</s>
<s>
There	O
will	O
be	O
two	O
existing	O
python	B-Language
files	O
,	O
boot.py	O
and	O
main.py	O
that	O
are	O
typically	O
not	O
modified	O
,	O
main.py	O
may	O
be	O
modified	O
if	O
you	O
wish	O
to	O
run	O
the	O
program	O
every	O
time	O
the	O
microcontroller	B-Architecture
is	O
booted	B-Operating_System
,	O
otherwise	O
,	O
programs	O
will	O
be	O
run	O
using	O
the	O
REPL	B-Application
console	O
.	O
</s>
<s>
The	O
pyboard	O
is	O
the	O
official	O
MicroPython	B-Language
microcontroller	B-Architecture
board	O
which	O
fully	O
supports	O
MicroPython	B-Language
's	O
software	O
features	O
.	O
</s>
<s>
The	O
pyboard	O
contains	O
an	O
internal	O
drive	O
(	O
filesystem	B-Application
)	O
named	O
/flash	O
which	O
is	O
stored	O
within	O
the	O
board	O
's	O
flash	O
memory	B-General_Concept
,	O
additionally	O
,	O
a	O
microSD	O
card	O
can	O
be	O
inserted	O
into	O
a	O
slot	O
and	O
is	O
accessible	O
through	O
/sd	O
.	O
</s>
<s>
When	O
booted	B-Operating_System
up	O
,	O
a	O
pyboard	O
must	O
select	O
a	O
filesystem	B-Application
to	O
boot	B-Operating_System
from	O
either	O
/flash	O
or	O
/sd	O
with	O
the	O
current	O
directory	O
being	O
set	O
to	O
either	O
/flash	O
or	O
/sd	O
.	O
</s>
<s>
If	O
needed	O
,	O
the	O
use	O
of	O
the	O
SD	O
card	O
for	O
the	O
booting	B-Operating_System
process	O
can	O
be	O
avoided	O
by	O
creating	O
an	O
empty	O
file	O
called	O
/flash/SKIPSD	O
which	O
will	O
remain	O
on	O
the	O
board	O
and	O
exist	O
when	O
the	O
pyboard	O
is	O
booted	B-Operating_System
up	O
and	O
will	O
skip	O
the	O
SD	O
card	O
for	O
the	O
booting	B-Operating_System
process	O
.	O
</s>
<s>
When	O
the	O
pyboard	O
is	O
powered	O
up	O
normally	O
or	O
the	O
reset	O
button	O
is	O
pressed	O
then	O
the	O
pyboard	O
is	O
booted	B-Operating_System
in	O
a	O
standard	O
mode	O
,	O
meaning	O
that	O
the	O
boot.py	O
file	O
is	O
executed	O
,	O
then	O
the	O
USB	B-Protocol
configured	O
and	O
finally	O
the	O
python	B-Language
program	I-Language
will	O
run	O
.	O
</s>
<s>
There	O
is	O
an	O
ability	O
to	O
override	O
the	O
standard	O
boot	B-Operating_System
sequence	I-Operating_System
through	O
holding	O
down	O
the	O
user	O
switch	O
whilst	O
the	O
board	O
is	O
in	O
the	O
booting	B-Operating_System
process	O
and	O
then	O
pressing	O
reset	O
as	O
you	O
continue	O
to	O
hold	O
the	O
user	O
switch	O
.	O
</s>
<s>
The	O
pyboard	O
's	O
LEDs	O
will	O
flick	O
between	O
modes	O
and	O
once	O
the	O
LEDs	O
have	O
reached	O
the	O
mode	O
wanted	O
by	O
the	O
user	O
,	O
they	O
can	O
let	O
go	O
of	O
the	O
user	O
switch	O
and	O
the	O
board	O
will	O
boot	B-Operating_System
in	O
the	O
specific	O
mode	O
.	O
</s>
<s>
the	O
boot	B-Operating_System
modes	O
are	O
:	O
</s>
<s>
if	O
red	O
and	O
green	O
LEDs	O
flash	O
alternatively	O
then	O
the	O
python	B-Language
script	I-Language
has	O
an	O
error	O
,	O
and	O
you	O
must	O
use	O
the	O
REPL	B-Application
to	O
debug	O
.	O
</s>
<s>
MicroPython	B-Language
includes	O
a	O
cross	B-Application
compiler	I-Application
which	O
generates	O
MicroPython	B-Language
bytecode	O
(	O
file	O
extension	O
.mpy	O
)	O
.	O
</s>
<s>
The	O
Python	B-Language
code	I-Language
can	O
be	O
compiled	B-Language
into	O
the	O
bytecode	O
either	O
directly	O
on	O
a	O
microcontroller	B-Architecture
or	O
it	O
can	O
be	O
precompiled	O
elsewhere	O
.	O
</s>
<s>
MicroPython	B-Language
firmware	B-Application
can	O
be	O
built	O
without	O
the	O
compiler	B-Language
,	O
leaving	O
only	O
the	O
virtual	B-Architecture
machine	I-Architecture
which	O
can	O
run	O
the	O
precompiled	O
mpy	O
programs	O
.	O
</s>
<s>
MicroPython	B-Language
is	O
utilised	O
through	O
firmware	B-Application
being	O
loaded	O
by	O
standard	O
software	O
onto	O
a	O
particular	O
microcontroller	B-Architecture
into	O
flash	O
memory	B-General_Concept
,	O
communicating	O
using	O
a	O
terminal	B-Application
application	B-Application
loaded	O
onto	O
a	O
computer	O
that	O
emulates	B-Application
a	O
serial	O
interface	O
.	O
</s>
<s>
The	O
main	O
uses	O
of	O
MicroPython	B-Language
can	O
be	O
generalised	O
into	O
3	O
categories	O
:	O
</s>
<s>
educational	O
purposes	O
:	O
using	O
MicroPython	B-Language
's	O
read	B-Application
–	I-Application
eval	I-Application
–	I-Application
print	I-Application
Loop	I-Application
(	O
REPL	B-Application
)	O
to	O
interact	O
with	O
a	O
microcontroller	B-Architecture
,	O
it	O
is	O
possible	O
to	O
visually	O
explain	O
the	O
concepts	O
of	O
data	O
processing	O
and	O
communicating	O
with	O
boards	O
in	O
a	O
simpler	O
way	O
than	O
more	O
complicated	O
programming	O
languages	O
.	O
</s>
<s>
developing	O
and	O
testing	O
device	O
and	O
sensor	O
designs	O
:	O
MicroPython	B-Language
offers	O
verified	O
,	O
bug-free	O
,	O
and	O
thoroughly	O
tested	O
reference	O
implementations	O
of	O
interfaces	O
used	O
in	O
microcontrollers	B-Architecture
solving	O
a	O
common	O
developer	O
's	O
task	O
of	O
implementing	O
peripheral	O
communication	O
setup	O
and	O
control	O
.	O
</s>
<s>
MicroPython	B-Language
offers	O
direct	O
and	O
interactive	O
accessibility	O
to	O
device	O
registers	O
which	O
makes	O
it	O
easy	O
to	O
verify	O
functionality	O
and	O
develop	O
and	O
test	O
hardware	O
parts	O
and	O
devices	O
and	O
algorithms	O
for	O
control	O
and	O
acquiring	O
data	O
from	O
a	O
device	O
.	O
</s>
<s>
monitoring	O
and	O
configuring	O
tool	O
for	O
design	O
of	O
complex	O
applications	O
:	O
certain	O
applications	O
require	O
specific	O
applications	O
on	O
high	O
performing	O
microcontrollers	B-Architecture
.	O
</s>
<s>
MicroPython	B-Language
is	O
able	O
to	O
assist	O
with	O
state	O
monitoring	O
and	O
set-up	O
of	O
system	O
parameters	O
.	O
</s>
<s>
Implementation	O
of	O
MicroPython	B-Language
can	O
differ	O
depending	O
on	O
the	O
availability	O
of	O
standard	O
and	O
supporting	O
libraries	O
and	O
the	O
microcontroller	B-Architecture
's	O
flash	O
memory	B-General_Concept
and	O
RAM	B-Architecture
size	O
.	O
</s>
