EA uniTFTm Series

Pin

Symbol

I/O

Description

1

GND

Ground 0 V

2

VDD

Power Supply 3.3 V

Power supply or 3.3V output at USB operation (max. 20mA)

3

RES

I

Reset

internal Pull-Up: (10..75 kΩ)

4

CS

I

SPI: Chip Select

internal Pull-Up: (1 MΩ)

5

MOSI

I

SPI: MOSI

6

MISO

O

SPI: MISO

7

CLK

I

SPI: CLK

internal Pull-Up: (1 MΩ)

8

RxD

I

RS232: Receive Data

internal Pull-Up: (1 MΩ)

9

TxD

O

RS232: Transmit Data

10

DE

O

RS485: Transmit Enable

11

SDA

I/O

I²C: Serial Data

internal Pull-Up: (10 kΩ); Pull-Up resistors can be changed for proper I²C connection

12

SCL

I

I²C: Serial Clock

internal Pull-Up: (10 kΩ´

13

SBUF

TESTMODE

I

Low: Data available in send buffer

PowerOn Low: Test mode

internal Pull-Up: (10 kΩ)

14

DPROT

I

High: Small-/Shortprotokoll active

Low:  deactivated

internal Pull-Up: (10 kΩ)

15

A/D 0

I

Analog Input 0

internal Pull-Down: (1 MΩ)

16

A/D 1

I

Analog Input 1

17

A/D 2

I

Analog Input 2

18

A/D 3

I

Analog Input 3

19

I/O 0.0

I/O

I/O 0.0 (Bit 0)

internal Pull-Up: (1 MΩ), Reset-state: Tri-State, default: input

20

I/O 0.1

I/O

I/O 0.1 (Bit 1)

21

I/O 0.2

I/O

I/O 0.2 (Bit 2)

22

I/O 0.3

I/O

I/O 0.3 (Bit 3)

23

I/O 0.4

I/O

I/O 0.4 (Bit 4)

24

I/O 0.5

I/O

I/O 0.5 (Bit 5)

25

I/O 0.6

I/O

I/O 0.6 (Bit 6)

26

I/O 0.7

I/O

I/O 0.7 (Bit 7)

27

PWM

O

PWM-Output

28

DNC

---

Do not connect

Reserved for future use

29

DNC

---

Do not connect

30

DNC

---

Do not connect

31

DNC

---

Do not connect

32

VDD BAT

Battery VDD for RTC

33

+5-28V=

Power Supply

Power supply input +5..28V=

34

BUZZER

O

Sound

PWM output for external speaker

35

IO SDA

I/O

I²C data to portexpander

Portexpander MCP23017-E can be connected here

36

IO CLK

O

I²C clock to portexpander

If not used please leave open

37

IO INT

I

Interrupt portexpander

If not used please leave open

38

DNC

---

Do not connect

39

VLED

Power Supply Backlight

Power Supply Backlight 3.3V - 9V

40

GND

Ground 0 V

Pin

Symbol

I/O

Description

1

GND

Ground 0 V

2

VDD

Power Supply 3,3 V

3

RES

I

Reset

intern Pull-Up: (1,3 kΩ)

4

CS

I

SPI: Chip Select

intern Pull-Up: (1 MΩ)

5

MOSI

I

SPI: MOSI

intern Pull-Up: (1 MΩ)

6

MISO

O

SPI: MISO

7

CLK

I

SPI: CLK

intern Pull-Up: (1 MΩ)

8

RxD

I

RS232: Receive Data

intern Pull-Up: (1 MΩ) (Slave)

9

TxD

O

RS232: Transmit Data

(Slave)

10

DE

O

RS485: Transmit Enable

11

SDA

I/O

I²C: Serial Data

internally Pull-Up: (1 MΩ) → with I²C mode an external Pull-Up resistor is needed (recommended: 10 kΩ)

12

SCL

I

I²C: Serial Clock

internally Pull-Up: (1 MΩ) → with I²C mode an external Pull-Up resistor is needed (recommended: 10 kΩ)

13

A/D 0

I

Analogue input 0

14

NC

---

Not connected

15

A/D 1

I

Analogue input 1

16

NC

---

17

I/O 0.0

I/O

I/O 0.0 (Bit 0)

18

NC

---

19

I/O 0.1

I/O

I/O 0.1 (Bit 1)

20

SBUF

TESTMODE

O

I

Low: Data in send buffer

PowerOn Low: Testmode active

intern Pull-Up: (10 kΩ)

21

PWM

O

PWM-output

22

DPROT

I

High: Small-/Shortprotokoll active

Low:  deactivated

intern Pull-Up: (1 MΩ)

23

VDD BAT

24

NC

---

25

VLED

Power Supply Backlight

Power Supply Backlight 3.3V - 9V

26

GND

Ground 0 V

Pin

Symbol

I/O

Description

27

I/O SDA

I/O

I²C data to portexpander

Portexpander MCP23017-E can be connected here

28

I/O SCL

O

I²C clock to portexpander

If not used please leave open

29

I/O INT

I

Interrupt portexpander

If not used please leave open

30

NC

---

31

NC

---

32

NC

---

33

NC

---

34

NC

---

35

I/O 0.7

I/O

I/O 0.7 (Bit 7)

36

I/O 0.6

I/O

I/O 0.6 (Bit 6)

37

I/O 0.5

I/O

I/O 0.5 (Bit 5)

38

I/O 0.4

I/O

I/O 0.4 (Bit 4)

39

I/O 0.3

I/O

I/O 0.3 (Bit 3)

40

I/O 0.2

I/O

I/O 0.2 (Bit 2)

41

A/D 3

I

Analogue input 3

42

A/D 2

I

Analogue input 2

43

NC

---

44

NC

---

45

NC

---

46

NC

---

47

NC

---

48

NC

---

49

NC

---

50

NC

---

51

VDD

Power Supply 3,3 V

52

GND

Ground 0 V