RoyalTek
Confidential
12
REB-1722 Operational Manual
Pin define:
Pin #
Signal Name I/O Description Characteristics
1 SDA2
I/O
General
purpose I/O
V
V
V
V
V
IL
IH
86
.
0
0.3V
-
0
.
2
15
.
3
≤
≤
≥
≥
V
V
V
V
V
OL
OH
71
.
0
14
.
2
85
.
2
≤
≥
≥
2 SCL2
I/O
General
purpose I/O
V
V
V
V
V
IL
IH
86
.
0
0.3V
-
0
.
2
15
.
3
≤
≤
≥
≥
V
V
V
V
V
OL
OH
71
.
0
14
.
2
85
.
2
≤
≥
≥
3 TxD1
O
Serial
port
A
V
V
V
V
V
OL
OH
71
.
0
14
.
2
85
.
2
≤
≥
≥
4
RxD1
I
Serial port B
V
V
V
V
V
IL
IH
86
.
0
0.3V
-
0
.
2
15
.
3
≤
≤
≥
≥
5 N.C.
~
N.C.
None
connector
6 VCC
I
DC Supply
Voltage input
DC +3.0~3.6V
7 GND
~
Ground
Reference
Ground
8
VCC_OUT
O
Connected to VCC, can open
9 CFG_COM1
I Config.Pin
V
V
V
V
V
IL
IH
86
.
0
0.3V
-
0
.
2
15
.
3
≤
≤
≥
≥
10 RESET_N I
Reset (Active
low)
8
.
0
2.3V
V
IH
V
V
IL
<
>
11 V_BCKP I
Backup voltage
supply
10uA
Current
3.6V
~
1.4
DC
≤
+
+
12 BOOT I
Boot
mode
V
V
V
V
V
IL
IH
86
.
0
0.3V
-
0
.
2
15
.
3
≤
≤
≥
≥
13 GND
~
Ground
Reference
Ground
14 GND
~
Ground
Reference
Ground
15 GND
~
Ground
Reference
Ground
16 RF_IN I
GPS Signal
input
50
Ω
@1.57542GHz
17 GND
~
Ground
Reference
Ground
18 VCC_RF
O
Supply Antenna
Bias voltage
DC +2.85V ±2%
Current < 20mA
19 V_ANT I
Active Antenna
Bias voltage
Receiving DC power supply for active
antenna bias.
20 AADET0_N I
Active Ant.
Detect
Detect Active Antenna=>”low”
V
V
V
V
V
IL
IH
86
.
0
0.3V
-
0
.
2
15
.
3
≤
≤
≥
≥
21~26 N.C. ~ N.C.
None
connector
27 EXTINT0 I
Ext.
Interrupt
Internal pull-up resistor to 2.85V
