Smart Machine Smart Decision
V_OUT
8
O
Output voltage. It Has been connected
to VCC inside the Module
If unused, keep open.
VCC_RF
18
O
2.8V output power supply for active
antenna
If unused, keep open.
V_ANT
19
I
Antenna Bias voltage
If unused
，
connect to
GND
V_BACKUP
11
I
The backup battery input power supply
for RTC
If unused, keep open.
GND
7,13,14,15,17
Ground
GND
Host port interface
SDA
1
I/O I
2
C data
SCL
2
I/O I
2
C C Clock
If unused, keep open.
TXD
3
O
Serial output
If unused, keep open
RXD
4
I
Serial input
If unused, keep open
TXD1
22
O
Serial output as RTCM
RXD1
21
I
Serial input as RTCM
GPIOs
EINT0
27
I
This interrupt source could act as wake
up event during power saving mode.
Provide an interrupt on either high or
low logic level or edge-sensitive
interrupt
Not supported yet, keep
open.
TIMEMARK
28
O
Time Mark outputs timing pulse related
to receiver time
If unused, keep open.
NRESET
10
I
Reset input, active low
If unused, keep open.
DET_N
20
I
Active Antenna Detect
If unused, keep open.
RF interface
RF_IN
16
Impendence must be
controlled to 50
Ω
.
I
Radio antenna connection
Other interface
NC
5,12,23,24,25
,26
Not Connected
Reserved
9
Not Connected
SIM68R_Hardware Design_V1.02
13
2013-01-22