MicroTouch Micro Touch Capacitive Controller MT3000, Справочное руководство, Страница: 17 / 64

Chapter 1 Integrating the MT3000 Controller 17
Supplying Power to the Controller
You must supply the MT3000 controller with power. You can use internal
power (that is, tap power from inside the monitor or PC) or external power.
Note: However you supply power, the source must deliver 70 mA typical,
with a maximum ripple and noise of 50mV peak-to-peak.
You can supply power to the MT3000 controller using any of the following
methods:
•
Internal power into JP2 using +5 volts DC at JP2, pin 1 and power
supply ground at JP2, pin 2
•
Internal power through a custom serial cable configuration
•
External power (+5 volts DC) from a wall-mount power supply
•
External power (+5 volts DC) from a keyboard power tap cable
Caution: Do not supply both internal power and external power to the
controller. Power from two sources could damage one or both of the power
supplies.
Using an Internal Power Supply (+5V) to JP2
You can power the MT3000 at JP2 using a +5 volt DC power source within
the system.
!
To provide power directly to the controller using JP2:
1.
Obtain a locking, mating connector for JP2
(Molex housing 22-01-3027 with 08-50-0114 contacts).
2.
Attach power and ground to the connector (Pin 1: +5V ,
Pin 2: Ground). The connector is keyed. Pin 1 has continuity to the
trace on the board.
3.
Insert locking connector into JP2.