xPico® Em
Serial
mbedded Dev
Figu
Interfac
The xP
The si
serial i
RS485
the ref
in the
multipr
used a
interfa
Serial
modem
for ser
Signa
TXD1
RTS1
RXD1
CTS1
TXD2
RXD2
vice Server In
ure 2-7 Ethe
e
Pico and xPic
gnal levels on
interfaces req
5, or RS422 n
ference schem
reference sch
rotocol RS232
as required. T
ace of an exte
Port 1, excep
m control (i.e
rial port 1.
al
Pin
10
5
1
7
16
2
25
2
23
ntegration Gu
rnet Connec
co Wi-Fi embe
n the serial in
quire an exter
networks. The
hematic is of t
2, RS485, RS
The xPico inte
ernal CPU. Se
pt it does not
. no DTR/DCD
Table 2-8 xP
Des
Seria
Seria
Seria
Seria
Seria
Seria
uide
ction Exampl
edded device
terface are 3
rnal transceiv
e signals of S
serial po
type Exar, pa
S422 transcei
erface may
al
erial Port 2 is
support hardw
D). It is highl
Pico and xPico
scription
l Transmit Data
l Ready-to-Sen
l Receive Data
l Clear-to-Send
l Transmit Data
l Receive Data
le (xPico wire
servers have
.3V logic leve
er in order to
Serial Port 1 m
ort example, b
art number SP
iver. Single p
lso be directly
a three wire
ware Flow Co
ly recommend
o Wi-Fi Serial P
a output
nd / Serial Tran
a input
d
a output 2
a input 2
2: Fun
red unit only)
e two externa
el with 5V tole
connect to ex
may be conne
below. The tr
P336. This tra
protocol trans
y connected t
interface only
ontrol (i.e. no
ded to conne
Port Signals
nsmit enable
nctional Descr
)
al serial interfa
erant inputs. T
xternal RS23
ected as show
ransceiver sh
ansceiver is a
sceivers may
to the UART
y. It operates
RTS/CTS) an
ct RTS and C
Reset St
Output
Output
Input
Input
Output
Input
ription
23
aces.
The
32,
wn in
own
a
be
s like
nd
CTS
tate
