Ver.1.11

DIO-48D-LPE

4

The I/O circuits of interface blocks of this board are illustrated in

the image below. Signals are LVTTL levels and positive logic.

None of the signals is pulled up.

◆

Input/Output circuit

GND

GND

INPUT/OUTPUT

SN74LV245

33Ω

External circuit

Board

CAUTION

Be careful of not to short the outputs to digital ground as this

may cause a fault.

If connecting pull-up resistors to the outputs, use a resistor of

approximately 10k

Ω and pull-up to the 5V power supply, or

use a resistor of approximately 4.7k

Ω and pull-up to the 3.3V

power supply.

◆

Example Connection 1 (Using DIO-68M/96F)

*

Resistor value should be adjusted according to the specification of the LED to use and the

desired intensity level.

◆

Example Connection 2

(Using PCA68PS-**P, PCB68PS-**P)

*

Resistor value should be adjusted according to the specification of the LED to use and the

desired intensity level.

DIO-48D-LPE

1-A port

(8 points)

2-C port (Low)

(4 points)

Interrupt

control

Control

circuit

1-C port (Low)

(4 points)

1-C port (High)

(4 points)

1-B port

(8 points)

2-C port (High)

(4 points)

2-B port

(8 points)

2-A port

(8 points)

LVTTL

transceiver

LVTTL

transceiver

TTL

transceiver

LVTTL

transceiver

LVTTL

transceiver

LVTTL

transceiver

LVTTL

transceiver

LVTTL

transceiver

Block Diagram

How to Connect Input/Output Signals

SN74LV245

or equivalent

33

Ω

33

Ω

Input

96-pin connector side

96-pin connector side

Output

GND

GND

1-PA0(A02 pin)

2-PA0(B02 pin)

GND(B01 pin)

GND(A01 pin)

Cable

Cable

Signal source

10k

Ω

+3.3V

330 - 3.3k

External circuit

External circuit

Buffer

+3.3V

SN74LV245

or equivalent

SN74LV245

or equivalent

SN74LV245

or equivalent

33

Ω

33

Ω

Input

68-pin connector side

68-pin connector side

Output

GND

GND

1-PA0(3 pin)

2-PA0(37 pin)

GND(36 pin)

GND(2 pin)

Cable

Cable

Signal source

10k

Ω

+3.3V

330 - 3.3k

External circuit

External circuit

Buffer

+3.3V