ZULU Telemetry
Pin out
Pin Description
Pin No
Name
Direction
Description
1
ANT
In
Antenna Input / Output 50ohm Impedance
2, 15
GND
In
Connect to ground
3
Analogue /
Digital
In
Connect to Vcc = I/O1-2 are digital
Connect to GND = I/O1-2 are Analogue
4 - 5
I/O1-2
In / Out
Analogue or digital I/Os 0
—
Vcc,
connect to GND if unused
6, 8-11, 25
-27
I/O 3-10
In / Out
When configured as transmitter:
Digital inputs: high Impedance inputs
When configured as receiver:
Digital outputs: LVCMOS output drive
7, 21-22
NC
Leave unconnected
12
Reset
In
Resets module operation, pull high for ordinary
use.
13
Watchdog
In
Connect to Vcc = Turns OFF “watchdog”
Connect to GND = Turns ON “watchdog”
14
Error LED
Out
LED drive output. Flashes if Zulu Tx has not received
acknowledgment or Zulu Rx not received watchdog.
16
Vcc
In
Supply voltage
17, 18
TX/RX
LEDs
Out
Active LED output when module is transmitting or
receiving RF data packets.
19
TX/RX
In
Connect to Vcc = Module is a Transmitter
Connect to GND = Module is a Receiver
20
Ch Sel
In
Sets the channel frequency
Connect to Vcc = Operates on ch A 869.500
Connect to GND = Operates on ch B 868.133
23
Learn
In
Connect to momentary switch to GND, when acti-
vated places the module into pairing mode.
24, 28
IRQ In/Out
In / Out
Connect together to enable RF interrupts on chip
(mandatory).
29-30
XTAL1-2
In
Connect 30MHz XTAL here to drive RF circuit
Zulu
ANT
2
1
GND
An / Dig
3
4
5
6
7
8
9
10
11
12
13
14
15
16
I/O 1
I/O 2
I/O 3
NC
I/O 4
I/O 5
I/O 6
I/O 7
RST
WD_SEL
ERR_LED
GND
Vcc
XTAL 1
XTAL 2
IRQ_OUT
I/O 10
I/O 9
I/O 8
IRQ_IN
LRN
NC
NC
CH_SEL
TX_RX_SEL
RF_TX_LED
30
29
28
27
26
25
24
23
22
21
20
19
18
17
RF_RX_LED
