User Manual
MG260 Product Specification
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agreement.
This serial link is used for AT commands communication, for GSM function only
(external mode) or for both GSM and GPS functions (internal mode).
Pin
description
Signal
Pin
#
I/O
I/O
type
Description
GSM
_
T
X
D
1
59
I
CMOS
CT1
03
–
Tr
ansmit
Ser
i
al
Dat
a
GSM
_
R
X
D
1
52
O
3X
CT1
04
–
R
e
ceive
Seri
al
Dat
a
GSM
_
R
T
S
1
50
I
CMOS
CT1
05
–
R
e
quest
To
Send
GSM
_
CT
S
1
57
O
3X
CT1
06
–
Cl
ear
To
Se
n
d
GSM
_
D
S
R
1
56
O
3X
CT1
07
–
D
a
t
a
Set
Ready
GSM
_
DT
R
1
54
I
CMOS
CT1
08-
2
–
Dat
a
Terminal
Ready
GSM
_
DCD
1
71
O
CMOS/
2X
CT1
09
–
D
a
t
a
Carrier
Det
e
ct
GSM
_
R
I
1
74
O
CMOS/
2X
CT1
25
–
Ri
ng
I
n
dicat
o
r
GSM_TXD1
GSM_RXD1
GSM_RTS1
GSM_CTS1
GSM_DSR1
GSM_DTR1
GSM_DCD1
GSM_RI1
GND
DTE
MG260
GSM
Serial
Link
Figure
13
:
GS
M
serial
link
signals
The
MG260
has
b
een
designed
to
allow
a
certai
n
flexibilit
y
in
the
use
of
the
serial
interface
signals.
However, the use of GSM_CTS1 and GSM_RTS1 signals for hardware flow
control in order to avoid data corruption during transmission is mandatory.
This is not the case for GSM_DTR1 and GSM_DSR1 signals which can be left
disconnected if not used.