LED Connection

To connect an external LED power-on indication lamp, connect the LED anode to pin-5 and the cathode to ground. Pin 5 provides +5V through a 300 ohm resistor.

Speaker Connections

The board supplies about 100 mW for a speaker on pin-7. Connect the other side of the speaker to ground (pin-8). A transistor amplifier buffers the speaker signal. Use a permanent magnet speaker with an 8 ohm voice coil.

Push-button Reset Connection

Pin-9 provides a connection for an external normally-open momentary switch to manually reset the system. Connect the other side of the switch to ground. The reset signal is “de-bounced” on the board.

Keyboard Connection

You can connect an AT keyboard to the keyboard port. Normally, AT keyboards include a cable that terminates in a male 5-pin DIN plug for connection to an AT (or a 6-pin miniature DIN plug for PS/2). Table 2-40gives the keyboard connector pinout and signal definitions, and includes corresponding pin numbers for DIN keyboard connectors.

Table 2-40. Keyboard Connector (J19)

Pin #

Signal Name

DIN-5 Pins

DIN-6 Pins

 

 

 

 

10

Keyboard Data

2

1

 

 

 

 

11

Keyboard Clock

1

5

 

 

 

 

12

Ground

4

3

 

 

 

 

13

Keyboard power

5

4

 

 

 

 

PS/2 Mouse Connection

You can connect aPS/2 Mouse to the mouse port. Normally, the PS/2 Mouse includes a cable that terminates in a 6-pin miniature DIN. Table 2-41gives the keyboard connector pinout and signal definitions, and includes corresponding pin numbers for DIN keyboard connectors.

Table 2-41. Keyboard Connector (J16)

Pin #

Signal Name

DIN-6 Pins

 

 

 

14

Mouse Data

1

 

 

 

15

Mouse Clock

5

 

 

 

16

Ground

3

 

 

 

17

Mouse power

4

 

 

 

2-42

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Ampro Corporation 5001451A manual LED Connection, Speaker Connections, Push-button Reset Connection, Keyboard Connection

5001451A specifications

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