User's Manual

DS-RN24_V2 1/28/2009
809 University Avenue • Los Gatos, CA 95032 • Tel [phone] • [e-mail]
Pin Description
NOTE: The Power can be applied to
either pin 12, or pin 3, but NOT both.
If pin 12 is powered then Pin 3 can be
used as a 3.3V regulated supply
output up to 200mA.
Pin Name Description Default
1 RESET Active HIGH Has 1K pulldown
2 GND
3 VCC
3.3V power (Only for RN24)
Mutually exclusive with Pin 12
4 SPI_CS Programming Only No Connect
5 SPI_CK Programming Only No Connect
6 SPI_MO Programming Only No Connect
7 SPI_MI Programming Only No Connect
8 CTS Input, if set HIGH disables transmitter TTL input
9 TX Transmit output TTL output
10 RTS Output, goes HIGH to disable host transmitter TTL output
11 RX Receive input TTL input
12 VDD 4-24V unregulated DC power (RN24 or RN25) Mutually exclusive with Pin 3
13 UART_TX Receive input RS-232 level signaling
14 UART_RX Transmit output RS-232 level signaling
15 UART_RTS Output, goes HIGH to disable host transmitter RS-232 level signaling
16 UART_CTS Input, if set HIGH disables transmitter RS-232 level signaling
17 GPIO-7 Default baud rate, HIGH = 9600, LOW = 115K Input to RN24, default = LOW
18 GPIO-6 Enable auto master mode = HIGH Input to RN24, default = LOW
19 GPIO-4 Restore factory defaults Set HIGH then toggle for 5
msec. 3 times
20 GPIO-3 Enable instant cable mode = HIGH Input to module, default = LOW
21 GPIO-2 Connection status, connected=HIGH Output from module
22 RS-485 D+
RS485 signaling (Only on RN25)
(Auto direction detect)
23 RS-485 D-
RS485 signaling (Only on RN25)
(Auto direction detect)
24 GND Ground
25 GPIO-11
26 GPIO-8 Controls red LED
27 GPIO-9 Controls yellow LED
28 GPIO-10
29 NC
30 NC
31 NC
32 GND Ground
RN24/RN25
1
2
3
4
5
6
7
8
9
10
11
12
Top view
24
23
22
21
20
19
18
17
16
15
14
13
32 31 3 0 29 28 27 26 25
RN24/RN25
1
2
3
4
5
6
7
8
9
10
11
12
Top view
24
23
22
21
20
19
18
17
16
15
14
13
32 31 3 0 29 28 27 26 25