General Purpose I/O Ports with Built-In Pull-Up MOS Transistors: The H8/300L Series
general purpose I/O ports are provided with pull-up MOS transistors. In some products, the
pull-up MOS transistors can be enabled as a mask option, and in other products, the pull-up
MOS transistors can be controlled by application programs.
Mask Option Products
Real Time Output Ports: The H8/300L Series microcomputers provide I/O ports with a real
time output function. This real-time output function allows a pin state to be switched
immediately upon the input of an external trigger input to a pin. The pin output state can be
specified to be an output data toggle operation or an input/output control switch operation.
Port data register 6
Port control register 6
Port data register slave
Port control register slave
Real time enable register
Note: This figure shows the H8/3927 port 6.
Program Control Products
PDR 6 write
PDR 6 read
PCR 6 write