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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
H8/3614 Series
H8/3714 Series
H8/3724 Series
H8/3754 Series
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.
<Notation>
PDR 6:
Port data register 6
PCR 6:
Port control register 6
PDRS:
Port data register slave
PCRS:
Port control register slave
RTER:
Real time enable register
Note: This figure shows the H8/3927 port 6.
Program Control Products
H8/3814 Series
H8/3834 Series
H8/3877 Series
H8/3927 Series
RTER write
CK
RTER
PDR 6 write
CK
PDR 6
PDR 6 read
PCR 6 write
CK
PCR 6
103
Peripheral Functions
TRGV
CK
PDRS
Selector
circuit
CK
PCRS
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