Kontron
speedMOPSlcdCE User’s Guide
29
Keyboard and Feature Interface
11.2
Signal Descriptions
/KBLOCK (Keyboard Lock)
Input on CPU modules
Output on any other module
Input to the keyboard controller input Port 1, Bit 7
/RESIN and PWRGOOD (Reset Inputs)
Input on CPU 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.
Speaker
Open collector output on modules that drive a piezo electronic speaker.
Input on modules that connects a 5V piezo electronic speaker to this pin.
An 8-Ohm loudspeaker also can be connected between SPEAKER and GND, but because
of current limitation the volume will be low.
Connect only one speaker to this pin. The CPU usually drives this pin. However, other
modules also can use this signal to drive the system speaker.
KBDAT (Keyboard Data)
Bi-directional I/O pin on CPU modules
Keyboard data signal
KBCLK (Keyboard Clock)
Bi-directional I/O pin on CPU modules
Keyboard clock signal
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