Table of Contents
Advertisement
External Speaker
Connector J19 includes a speaker output signal at pin 39. The VL-CBR-5013 breakout board
provides a Piezo electric speaker.
LEDs
P
ROGRAMMABLE
Connector J19 includes an output signal for a programmable LED. Connect the cathode of the
LED to J19 pin 38; connect the anode to +5V. A 332Ω on-board resistor limits the current to 15
mA when the LED is shorted. A programmable LED is provided on the VL-CBR-5013 breakout
board. The programmable LED is the top LED at position D1.
To turn the LED on and off, set or clear bit D7 in I/O port CA0h. When changing the register,
make sure not to alter the value of the other bits.
The following code examples show how to turn the LED on and off.
LED On
MOV
DX,CA0H
IN
AL,DX
OR
AL,80H
OUT
DX,AL
P
LED
OWER
The power LED on the VL-CBR-5013 indicates that the paddle board is being powered by the
5V supply (though it does not indicate that all S0 power supplies are good). The LED is lit only
on when the board is in the S0 power state. If the board enters a Sleep or Hibernate mode, the
LED will not be lit.
There is also an on-board green "Power-OK" LED (at location D4). This will illuminate when all
power rails are good, and indicates that the board is in the S0 power state. If any power rail is not
good, the LED will not illuminate. It also goes out when the board enters a sleep or hibernate
power mode.
VL-EPIC-25 Reference Manual
LED
LED Off
MOV
DX,CA0H
IN
AL,DX
AND
AL,7FH
OUT
DX,AL
Interfaces and Connectors
41
Advertisement
Table of Contents
