SimCom SIM68R Hardware Design page 13

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