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REB-3300 Operational Manual
Hardware interface
Definition of Pin assignment
Pin # Signal Name I/O Description Characteristics
1 VCC I DC Supply Voltage
input
DC +3.3V±10%
2 GND G Ground Digital Reference Ground
3 Bootselect I Boot mode
VCCVVVCCVV
ILIH
*3.0 *7.0 ≤≥
4 RXA I Serial port A
VCCVVVCCVV
ILIH
*3.0 *7.0 ≤≥
5 TXA O Serial port A
VVVV
OLOH
4.0 4.2 ≤≥
6 TXB O Serial port B
VVVV
OLOH
4.0 4.2 ≤≥
7 RXB I Serial port B
VCCVVVCCVV
ILIH
*3.0 *7.0 ≤≥
8 GPIO3 I/O General –purpose I/O
VVVV
VCCVVVCCVV
OLOH
ILIH
4.0 4.2
*3.0 *7.0
≤≥
≤≥
9 RF_ON O Indicates power state
of RF part
VVVV
OLOH
0 85.2 =
=
10 GND G Digital Ground Digital Reference Ground
11
|
16
GND_A G Analog Ground Analog Reference Ground
17 RF_IN I GPS Signal input 50 Ω @1.57542GHz
18 GND_A G Analog Ground Analog Reference Ground
19 V_ANT_IN I Active Antenna Bias
voltage
Receiving DC power supply for active antenna
bias.
20 VCC_RF O Supply Antenna Bias
voltage
VV
O
0.3
=
±0.3
21 V_BAT I Backup voltage supply
battery) (w/o10uA Current
3.6V~2.6 DC
≤
+
+
22 Reset I Reset (Active low)
8.0 2.3V V
IH
VV
IL
<
>
23 GPIO10 I/O General purpose I/O
VVVV
VCCVVVCCVV
OLOH
ILIH
4.0 4.2
*3.0 *7.0
≤≥
≤≥
11