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Version 1.3r 4/9/2012
4
RN -17 4-DS
Figure 1. RN-174 Evaluation Board (Part 1 of 2)
RS-232 Interface (J3)
RX - input to evaluation board
TX - output from evaluation board
Pin
Description
1
No connect
2
RS-232 TX
3
RS-232 RX
4
No connect
5
GND
6
No connect
7
RS-232 RTS
8
RS-232 CTS
9
4 to 16 VDC input
10
No connect
Power Select Jumper (J4)
High-Voltage Mode (Default). The board is
powered by a source up to 16 V DC.
Low-Voltage Mode. The board is powered
by 2.0- to 3.3-V DC only.
External Power Mode. Used when
powering the board with regulated 3.3-V
DC power.
GPIO Interface
TTL Signals (J8)
RX - input to evaluation board
TX - output from evaluation board
Pin
Description
1
3.3 VDD
2
GND
3
UART RX
4
UART TX
5
GPIO4
6
GPIO5
7
GPIO6
8
GPIO7
9
GPIO8
10
GPIO9
11
UART CTS
12
UART RTS
13
RESET
Sensors (J1)
Pin
Description
1
Sensor PWR
2
Sensor 4 (3.3-V tolerant)
3
Sensor 5 (3.3-V tolerant)
4
Sensor 7 (1.2 V only)
5
Sensor 5 (1.2 V only)
6
Sensor 4 (1.2 V only)
7
Sensor 6 (1.2 V only)
8
Sensor 3 (1.2 V only)
9
GND
WARNING: Voltage on pins marked
1.2 V
Only
should not exceed 1.2 V or permanent
damage will occur.
Power (J7)
Pin
Description
1
5 to 12 VDC
2
GND
Pull Up/Down (J2)
Ad Hoc Mode/Factory Reset (J6)
LED Indicators
RS-232
Interface (J3)
Power Select
Jumper (J4)
GPIO Interface
TTL Signals (J8)
Power
(J7)
Sensor
Interface (J1)
PCB Trace
Antenna
ISP Connector
(J5)
Pull Up/
Down (J2)
Factory Reset/
Ad Hoc Mode (J6)
9
5
2
3
4
6
7
8
1
10
1
2
3
4
5
6
7
8
9
10
11
12
13
9
5
2
3
4
6
7
8
1
1
2
1
2
3
