User's Manual

E
hon
g
T
6.5.
This is
UART
device
s
The U
A
control
6.6.
PIO6,
P
softwa
r
keyboa
resisto
r
T
echnolo
gy
C
o
UART
a standar
d
interface
p
s
using th
e
A
RT CTS
a
where bo
t
I2C Mas
t
P
IO7 and P
r
e to drive t
h
rd scanner
r
s.
Baud Rat
e
Nu
o
., Ltd 
d
UART in
p
rovides a
e
RS232 p
a
nd RTS
s
t
h are acti
v
t
e
r
IO8 can be
h
ese lines.
or EEPR
O
Paramet
e
Flow Con
t
Parity
mber of St
o
Bits per B
y
terface fo
r
simple m
e
rotocol.
s
ignals ca
n
v
e low indi
Table 10:
Figure 3:
C
used to fo
r
It is suited
O
M. In the
er
Minimu
Maxim
u
t
rol
o
p Bits
y
te
r
communi
c
e
chanism f
o
n
be used
t
cators.
Possible U
C
onnection
T
r
m a mast
e
only to rel
a
case, PI
O
m
u
m
c
ating wit
h
o
r commu
n
t
o implem
e
ART Settin
g
T
o Host de
v
e
r I
2
C interf
a
a
tively slow
O
lines nee
d
B
h
other ser
i
n
icating w
i
e
nt RS232
g
s
v
ice
a
ce. The in
t
functions
s
d
to be pul
Possibl
1200 bau
d
9600 bau
d
3M baud
(
RTS/CT
S
None, O
d
1
o
B
luetooth Au
d
i
al device
s
i
th other s
e
hardware
t
erface is f
o
s
uch as dri
v
led up thr
o
e Values
d
(2%Erro
r
d
(1%Erro
r
(
1%Error)
S
or None
d
d or Even
o
r 2
8
d
io Module
s
. The
e
rial
flow
o
rmed usin
g
v
ing a LCD
o
ugh 2.2K
Ω
r
)
r
)
g
,
Ω