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DS-TMU3100
7
tenx technology, inc.
Rev 1.4 2004/03/01
2. I/O Port
2.1 KSO[15:0]
These pins are used as keyboard scan outputs. They have at least 4mA drive and sink strength.
2.2 KSI[7:0]
These pins are used as keyboard scan inputs. Each one of them has a pull up resistor. In addition, each KSI
pin can cause Keyboard interrupt (KBDint) if the corresponding interrupt mask bit (KBDmask) is 0. The
KBDint is asserted at the falling edge of KSI pin.
2.3 PA[3:0]
These pins are similar to KSO pins, except data are read from pin. They can be used as input or open drain
output.
50uA
Data
Pin
4mA
KSO[15:0]
Q
D
CK
/WR
Data
Register
4mA
Read
Data
Pin
Read
Data
KSI[7:0]
Pin
Read
Data
PA[3:0]
50uA
Data
4mA
Q
D
CK
Data
Register
4mA
/WR
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