User's Manual

GSM/GPRS/GNSS Module Series
MC60 Hardware Design
MC60_Hardware_Design Confidential / Released 23 / 99
UART Port
PIN Name PIN No. I/O Description DC Characteristics Comment
TXD 33 DO Transmit data
V
IL
min=0V
V
IL
max=
0.25×VDD_EXT
V
IH
min=
0.75×VDD_EXT
V
IH
max=
VDD_EXT+0.2
V
OH
min=
0.85×VDD_EXT
V
OL
max=
0.15×VDD_EXT
If only TXD, RXD
and GND are
used for
communication, it
is recommended
to keep all other
pins open.
RXD 34 DI Receive data
DTR 37 DI Data terminal ready
RI 35 DO Ring indication
DCD 36 DO Data carrier detection
CTS 38 DO Clear to send
RTS 39 DI Request to send
Debug Port
PIN Name PIN No. I/O Description DC Characteristics Comment
DBG_
TXD
29 DO Transmit data
The same as UART
port
If unused, keep
these pins open.
DBG_
RXD
30 DI Receive data
Auxiliary UART Port
PIN Name PIN No. I/O Description DC Characteristics Comment
TXD_
AUX
25 DO Transmit data
The same as UART
port
Refer to Section
3.2
RXD_
AUX
24 DI Receive data
GNSS UART Port
PIN Name PIN No. I/O Description DC Characteristics Comment
GNSS_
TXD
22 DO Transmit data
VOLmax=0.42V
VOHmin=2.4V
VOHnom=2.8V
Refer to Section
3.2
GNSS_
RXD
23 DI Receive data
VILmin=-0.3V
VILmax=0.7V
VIHmin=2.1V
VIHmax=3.1V
SIM Interface
PIN Name PIN No. I/O Description DC Characteristics Comment
SIM1_ VDD
SIM2_ VDD
18
13
PO
Power supply for SIM
card
The voltage can be
selected by software
All signals of SIM
interface should