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MOPSlcdGX1 Product Manual
10.3 Signal Descrpitions
10.3.1 KLOCK# (Keyboard Lock)
• Input on CPU modules
• Output on other modules
• Input to keyboard controller: input port 1, bit 7
10.3.2 RESIN (Reset Input 1)
• Input on CPU modules
• Open collector output on all other modules
• When POWERGOOD goes high, it starts the reset generator on the CPU module
to pull the onboard reset line high after a valid reset period. You also can use this
pin as a low active hardware reset for modules.
10.3.3 SPKR (Speaker Output)
• Open-collector output on modules that can drive a loudspeaker.
• Input on modules that connect an 8-Ohm loudspeaker to this pin.
• An 8-Ohm loudspeaker is connected between SPEAKER and GND. Connect just
one loudspeaker to this pin. The CPU usually drives this pin. However, other
modules also can use this signal to drive the system loudspeaker.
10.3.4 KDATA (Keyboard Data)
• Bi-directional I/O pin on CPU modules
• Keyboard data signal
10.3.5 KCLK (Keyboard Clock)
• Bi-directional I/O pin on CPU modules
• Keyboard clock signal
Kontron Embedded Modules
Keyboard and Front-Panel Interface
19
Revision 1.3
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