–

–

–

–

36

37

Typical Applications

Figure 31 and Figure 32 show circuits using the TT Series transceiver.

In this example, C0 is high and C1 is low, so S0–S3 are inputs and S4–S7

are outputs. The inputs are connected to buttons that pull the lines high

and weak pull-down resistors to keep the lines from floating when the

buttons are not pressed. The outputs would be connected to external

application circuitry.

LATCH_EN is low, so the outputs are momentary.

The Command Data Interface is not used in this design, so CMD_DATA_IN

is tied high and CMD_DATA_OUT is not connected.

ACK_OUT and MODE_IND are connected to LEDs to provide visual

indication to the user.

PAIR is connected to a button and pull-down resistor to initiate the Pair

Process when the button is pressed.

ACK_EN is tied high so the module sends acknowledgements as soon as it

receives a control message.

1

TRM-XXX-TT

NC

2

GND

3

NC

4

NC

5

GND

6

NC

7

S0

9

S1

10

GND

11

S7

18

S6

19

RSSI

21

GND

22

GND

23

POWER_DOWN

24

VCC

25

S5

26

CMD_DATA_IN

27

S2

12

GND

17

S3

13

LVL_ADJ

14

LATCH_EN

15

RESET

16

NC

8

S4

20

GND

GND

28

CMD_DATA_OUT

29

C0

30

ACK_OUT

31

C1

32

PAIR

33

GND

34

MODE_IND

35

ACK_EN

36

NC

37

NC

38

GND

39

NC

40

NC

41

GND

42

ANTENNA

43

GND

44

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

VCC

VCC

GND

100k

100k

100k

100k

GND

91k 1%

GND

GND

GND

GND

VCC

VCC

VCC

VCC

GND

S7

S6

S4

S5

VCC

GND

GND

GND

VCC

VCC

NC

2

GND

3

NC

4

NC

5

GND

6

NC

7

S0

9

S1

10

GND

11

S7

18

S6

19

RSSI

21

GND

22

GND

23

POWER_DOWN

24

VCC

25

S5

26

CMD_DATA_IN

27

S2

12

GND

17

S3

13

LVL_ADJ

14

LATCH_EN

15

RESET

16

NC

8

S4

20

GND

1

GND

28

CMD_DATA_OUT

29

C0

30

ACK_OUT

31

C1

32

PAIR

33

GND

34

MODE_IND

35

ACK_EN

36

NC

37

NC

38

GND

39

NC

40

NC

41

GND

42

ANTENNA

43

GND

44

TRM-XXX-TT

GND

GND

GND

GND

GND

GNDGND

GND

GND

GND

GND

GND

VCC

VCC

GND

91k 1%

GND

S0

S1

S2

S3

VCC

GND

GND

100k

GND

VCC

100k

100k

100k

GND

GND

GND

GND

VCC

VCC

VCC

VCC

VCC

100k

µ

VCC

RX

TX

GPIO

100k

Figure 31: TT Series Transceiver Basic Application Circuit

In this example, C0 is low and C1 is high, so S0–S3 are outputs and

S4–S7 are inputs. This is inverted from the circuit in Figure 31 making it the

matching device.

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.

1

TRM-XXX-TT

NC

2

GND

3

NC

4

NC

5

GND

6

NC

7

S0

9

S1

10

GND

11

S7

18

S6

19

RSSI

21

GND

22

GND

23

POWER_DOWN

24

VCC

25

S5

26

CMD_DATA_IN

27

S2

12

GND

17

S3

13

LVL_ADJ

14

LATCH_EN

15

RESET

16

NC

8

S4

20

GND

GND

28

CMD_DATA_OUT

29

C0

30

ACK_OUT

31

C1

32

PAIR

33

GND

34

MODE_IND

35

ACK_EN

36

NC

37

NC

38

GND

39

NC

40

NC

41

GND

42

ANTENNA

43

GND

44

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

VCC

VCC

GND

100k

100k

100k

100k

GND

91k 1%

GND

GND

GND

GND

VCC

VCC

VCC

VCC

GND

S7

S6

S4

S5

VCC

GND

GND

GND

VCC

VCC

NC

2

GND

3

NC

4

NC

5

GND

6

NC

7

S0

9

S1

10

GND

11

S7

18

S6

19

RSSI

21

GND

22

GND

23

POWER_DOWN

24

VCC

25

S5

26

CMD_DATA_IN

27

S2

12

GND

17

S3

13

LVL_ADJ

14

LATCH_EN

15

RESET

16

NC

8

S4

20

GND

1

GND

28

CMD_DATA_OUT

29

C0

30

ACK_OUT

31

C1

32

PAIR

33

GND

34

MODE_IND

35

ACK_EN

36

NC

37

NC

38

GND

39

NC

40

NC

41

GND

42

ANTENNA

43

GND

44

TRM-XXX-TT

GND

GND

GND

GND

GND

GNDGND

GND

GND

GND

GND

GND

VCC

VCC

GND

91k 1%

GND

S0

S1

S2

S3

VCC

GND

GND

100k

GND

VCC

100k

100k

100k

GND

GND

GND

GND

VCC

VCC

VCC

VCC

VCC

100k

µ

VCC

RX

TX

GPIO

100k

Figure 32: TT Series Transceiver Typical Application Circuit with External Microprocessor