Pin assignment

Pin assignment for "primary" and "secondary" connector. The position of the two connectors can be found here.

Primary connector

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

D-

I/O

USB: Data negativ

Solder bridges need to be closed to use USB interface through primary connector (see I/O Ports))

15

A/D 1

I

Analogue input 1


16

D+

I/O

USB: Data positiv

Solder bridges need to be closed to use USB interface through primary connector (see I/O Ports)

17

I/O 0.0

I/O

I/O 0.0 (Bit 0)


18

VBUS

I

USB: Supply Voltage (5 V)


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

♫ +

O

Speaker output (8 Ω)


24

♫ -

O

Speaker output (8 Ω)


25

VDD/
VLED


Power Supply 3,3 V

EA uniTFT050-A: connection to pin 2

EA uniTFT070-A and EA uniTFT101-A: separate power supply for backlight only (VLED) with wide range: 3.1 - 9 V

26

GND


Ground 0 V


Secondary connector

Pin

Symbol

I/O

Description

27

I/O 1.7

SDA

I/O

I/O

I/O 1.7 (Bit 15)

Port Expander Serial Data

default

Solder bridges need to be set to use individual port expander (see I/O Ports)

28

I/O 1.6

SCL

I/O

O

I/O 1.6 (Bit 14)

Port Expander Serial Clock

default

Solder bridges need to be set to use individual port expander (see I/O Ports)

29

I/O 1.5

INT

I/O

I

I/O 1.5 (Bit 13)

Port Expander Serial Clock

default

Solder bridges need to be set to use individual port expander (see I/O Ports)

30

I/O 1.4

I/O

I/O 1.4 (Bit 12)


31

I/O 1.3

I/O

I/O 1.3 (Bit 11)


32

I/O 1.2

I/O

I/O 1.2 (Bit 10)


33

I/O 1.1

I/O

I/O 1.1 (Bit 9)


34

I/O 1.0

I/O

I/O 1.0 (Bit 8)


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

SCL

O

Master I²C: Serial Clock

internal Pull-Up: (1 MΩ) I²C bus requires an external Pull-Up resistor (recommended: 10 kΩ)

44

SDA

I/O

Master I²C: Serial Data

internal Pull-Up: (1 MΩ) I²C bus requires an external Pull-Up resistor (recommended: 10 kΩ

45

TxD

O

Master RS232: Transmit Data


46

RxD

I

Master RS232: Receive Data

intern Pull-Up: (1 MΩ)

47

CLK

O

Master SPI: CLK


48

MISO

I

Master SPI: MISO


49

MOSI

O

Master SPI: MOSI


50

CS

O

Master SPI: Chip Select


51

VDD


Power Supply 3,3 V


52

GND


Ground 0 V