Toshiba TLCS-900/H1 Series Manual page 110

3.7.8 Port A (PA0 to PA7)
Ports A0 to A7 are 8-bit general-purpose input ports with pull-up resistor. In addition to
functioning as general-purpose I/O ports, ports A0 to A7 can also, as a Keyboard interface,
operate a Key-on wake-up function. The various functions can each be enabled by writing a
"1" to the corresponding bit of the Port A Function Register (PAFC).
Resetting resets all bits of the register PAFC to "0" and sets all pins to be input port.
INTKEY
When PAFC = "1", if the input of any of KI0-KI7 pins falls down, an INTKEY interrupt is
generated. An INTKEY interrupt can be used to release all HALT modes.
PA0~PA7
8 input OR
Rising edge
-ditection
Reset
KEY-ON
ENABLE
(on bit basis)
PAFC write
PA read
Figure 3.7.18 Port A
92CF30-108
TMP92CF30
Pull-up resistor
TYP 50K Ω
PA0 to PA7
(KI0 to KI7)
2009-06-12