Linx HumPRC Series Data Manual page 44

VCC
VCC VCC
GND
30
MODE_IND
31
GND ACK_OUT
32
VCC GND
1
S7 S7
GND
2
S6 S6
3
S5 S5
4
S4 S4
A
VCC VCC
VCC
VCC
GND
30
MODE_IND
31
GND ACK_OUT
32
VCC GND
1
S7
GND
2
S6
3
VCC S5
4
VCC S4
VCC
VCC
B
Figure 85: HumPRC Series Transceiver Basic Application Circuits for Bi-directional Remote Control
TM
VCC
GND
GND
20
GND GND
19
ANT
18
GND GND
17
GND GND
16
GND GND
15
GND GND
14
GND GND
GND VCC GND VCC GND
VCC VCC
VCC
GND
VCC GND
20
GND GND
19
ANT
18
GND GND
17
GND GND
16
GND GND
15
GND
GND
14
GND GND
GND GND VCC VCC GND
– –
82
Figure 86 shows a typical circuit using the HumPRC
with an external microcontroller.
RXD
µ TXD
GPIO
GPIO GPIO
VCC
GND
30
MODE_IND
31
GND ACK_OUT
32
GND GND
1
S7
2
S6
3
VCC S5
4
VCC S4
VCC
VCC
Figure 86: HumPRC Series Transceiver Basic Application Circuit with a Microcontroller
TM
In this example, C0 is low and C1 is high, so S0–S3 are outputs and S4–S7
are inputs. The inputs are connected to buttons that pull the lines high.
Internal pull-down resistors keep the lines from floating when the buttons
are open. The outputs are connected to external application circuitry.
LATCH_EN is low, so the outputs are momentary.
ACK_OUT and MODE_IND are connected to LEDs to provide visual
indication to the user.
PB is connected to a button and pull-down resistor to initiate the Join
Process when the button is pressed.
In this circuit, the Command Data Interface is connected to a
microcontroller for using some of the advanced features.
The microcontroller controls the state of the ACK_EN line. It can receive
a command, perform an action and then take the line high to send
Acknowledgement packets. This lets the user on the other end know that
the action took place and not just that the command was received.
Series transceiver
TM
VCC
GND
GND
20
GND GND
19
ANT
18
GND GND
17
GND GND
16
GND GND
15
GND GND
14
GND GND
GND GND VCC GND
– –
83