Toshiba TLCS-900/H1 Series Manual page 90

3.5.10 Port A (PA0 to PA7)
Ports A0 to A7 are 8-bit 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 wakeup 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 to KI7 pins fall down, an INTKEY interrupt
is generated. An INTKEY interrupt can be used to release all HALT modes.
PA0 to PA7
8-input OR
Edge
detection
Reset
PAFC
PAFC write
PA read
Reset
LD8 to LD11
PACR
PACR write
Figure 3.5.24 Port A
92CH21-88
TMP92CH21
Pull-up resistor
PA0 (KI0)
PA1 (KI1)
PA2 (KI2)
PA3 (KI3, LD8)
PA4 (KI4, LD9)
PA5 (KI5, LD10)
PA6 (KI6, LD11)
PA7 (KI7)
Only for PA3 to PA6
2009-06-19