Measurement-computing miniLAB-1008 Manual de usuario descargar pdf (Pagina 15)

miniLAB 1008 User's Guide Functional Details

Digital I/O connector and pin out

Digital I/O connections are made to the DB37 connector on the top edge of the miniLAB 1008. This connector

provides connections for 24 digital lines (

Port A0 to Port C7), six ground connections (GND), and two power

output terminals (

USB +5V Out). Refer to and Table 3-2 for the DB37 connector pin out. Figure 3-2

Figure 3-2. DB37 Digital I/O connector

Digital I/O connections (Port A0 through Port C7)

The 24 digital I/O pins (

Port A0-A7, Port B0-B7 and Port C0-C7) are TTL-level compatible. Each pin has a

47 kilohm (kΩ) pull-up resistor and is configured as an input by default. If needed, the miniLAB 1008 can be

factory configured to provide pull-down resistors.

Caution! Port A0 through Port C7 have no overvoltage/short circuit protection. Do not exceed the voltage

limits or you may damage the pin or the miniLAB 1008. To protect these pins, you should use a

series resistor.

Table 3-2. DB37 connector pin out

Pin Signal Name Pin Signal Name

1 n/c 20 USB +5V Out

2 n/c 21 GND

3 Port B7 22 Port C7

4 Port B6 23 Port C6

5 Port B5 24 Port C5

6 Port B4 25 Port C4

7 Port B3 26 Port C3

8 Port B2 27 Port C2

9 Port B1 28 Port C1

10 Port B0 29 Port C0

11 GND 30 Port A7

12 n/c 31 Port A6

13 GND 32 Port A5

14 n/c 33 Port A4

15 GND 34 Port A3

16 n/c 35 Port A2

17 GND 36 Port A1

18 USB +5V Out 37 Port A0

19 GND

Refer to the "Digital connector cabling" section for descriptions of cables that are compatible with the DB37

digital I/O connector.

Caution! The USB +5V Out pins on the DB37 connector are outputs. Do not connect an external 5 V supply

or you may damage the miniLAB 1008 and possibly the computer.

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