User's Manual

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10 11
Pin Assignments
5
6
7
1
2
3
4
44
NC
NC
NC
BE
NC
NC
NC
9
10
11
8 NC
NC
NC
GND
12 13 14 15 16 17 18 19 20
CRESP
EX PB
CMD_DATA_OUT
NC NC
CMD_DATA_IN
NC NC
21 22
VCC
NC
43 42 41 40 39 38 37 36 35 34
POWER_DOWN NC NC NC NC NC RESET MODE_IND NC CTS CMD ANT GND
33 32
ANT
Figure 14: HumPRO-A
TM
Series Transceiver Pin Assignments (Top View)
Pin Descriptions
Pin Number Name I/O Description
1, 2, 3, 5, 6,
7, 8, 10, 11,
17-21, 37, 38,
39, 41, 42, 44
NC —
No Electrical Connection. Do not connect
any traces to these lines.
4 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.
9, 32 GND — Ground
12 EX O
Exception Output. A mask can be set
to take this line high when an exception
occurs.
Pin Descriptions
Pin Number Name I/O Description
13 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.
14 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.
15 CMD_DATA_OUT O
Command Data Out. Output line for data
and serial commands
16 CMD_DATA_IN I
Command Data In. Input line for data (CMD
is high) and serial commands (CMD is low).
22 VCC — Supply Voltage
33 ANTENNA — 50-ohm RF Antenna Port
34 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.
35 CMD I
Command Input. When this line is low,
incoming bytes are command data.
When high, incoming bytes are data to be
transmitted.
36 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.
40 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.
43 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.
Figure 15: HumPRO-A
TM
Series Transceiver Pin Descriptions
Pin Descriptions