User Guide
– –
– –
10 11
Pin Assignments
30
31
32
1
2
3
4
20
19
18
17
16
15
14
5 678 9 10 11 12 13
29 28 27 26 25 24 23 22 21
ANT
GND
GND
GND
GND
GND
GND
BE
MODE_IND
NC
NC
NC
NC
NC
NC
NC
CRESP
EX
NC
NC
GND
CMD
POWER_DOWN
CTS
PB
CMD_DATA_IN
CMD_DATA_OUT
LNA_EN
PA_EN
GND
VCC
RESET
Figure 14: HumPRO
TM
Series Transceiver Pin Assignments (Top View)
Pin Descriptions
Pin Number Name I/O Description
1, 2, 3, 4, 5,
6, 10, 11, 32
NC —
No Electrical Connection. Do not connect
any traces to these lines.
7 CRESP O
Command Response. This line is low when
the data on the CMD_DATA_OUT line is
a response to a command and not data
received over the air.
8 EX O
Exception Output. A mask can be set
to take this line high when an exception
occurs.
9, 14, 15, 16,
17, 18, 20, 25
GND — Ground
12 POWER_DOWN I
Power Down. Pulling this line low places the
module into a low-power state. The module
is not functional in this state. Pull high for
normal operation. Do not leave floating.
Pin Descriptions
Pin Number Name I/O Description
13 CMD I
Command Input. When this line is low,
incoming bytes are command data.
When high, incoming bytes are data to be
transmitted.
19 ANTENNA — 50-ohm RF Antenna Port
21 VCC — Supply Voltage
22 RESET I
This line resets the module when pulled low.
It should be high for normal operation. This
line has an internal 10k resistor to supply, so
leave it unconnected if not used.
23 LNA_EN O
Low Noise Amplifier Enable. This line is
driven high when receiving. It is intended to
activate an optional external LNA.
24 PA_EN O
Power Amplifier Enable. This line is driven
high when transmitting. It is intended to
activate an optional external power amplifier.
26 CMD_DATA_OUT O
Command Data Out. Output line for data
and serial commands
27 CMD_DATA_IN I
Command Data In. Input line for data (CMD
is high) and serial commands (CMD is low).
28 CTS O
UART Clear To Send, active low. This line
indicates to the host microcontroller when
the module is ready to accept data. When
CTS is high, the module is busy. When CTS
is low, the module is ready for data.
29 PB I
Push Button input. This line can be
connected to Vcc through a normally open
push button. Button sequences can reset
configurations to default and join modules
into a network. Pull low when not in use;
do not leave floating.
30 MODE_IND O
Mode Indicator. This line indicates module
activity. It can source enough current to drive
a small LED, causing it to flash. The duration
of the flashes indicates the module’s current
state.
31 BE O
Buffer Empty. This line is high when the
UART input buffer is empty, indicating
that all data has been transmitted. If
acknowledgment is active, it also indicates
that the receiving module has acknowledged
the data or a retry exception has occurred.
Figure 15: HumPRO
TM
Series Transceiver Pin Descriptions
Pin Descriptions