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Peripheral Functions
High Current Ports: These are high current ports that can drive external LEDs. The port
functions are the same as general purpose I/O ports.
Item
Output low level voltage
Built-In Pull-Down MOS Transistors High Breakdown Voltage Ports: These ports are
provided in the H8/3714 Series and the H8/3724 Series, and are 40 V breakdown voltage ports
that can drive vacuum fluorescent displays. The table below lists their current drive
capabilities.
Item
Output high level voltage
Output low level voltage
The pull-down MOS transistors built into these ports can be enabled or disabled as a mask
option.
<Notation>
PDR: Port data register
Note: This figure shows the H8/3724 high breakdown voltage port.
Symbol
Condition
V
V
OL
CC
I
OL
Symbol
Condition
V
–I
OH
OH
–I
OH
–I
OH
V
150 kΩ pull-down resistor
OL
Pull-down voltage
Vdisp = V
V
CC
Mask option
V
disp
104
= 4.0 to 5.5 V
= 10 mA
= 15 mA
= 10 mA
= 4 mA
– 40 V
CC
STBY
Input control
Rating
1.5 V
Rating
V
– 3.0 V
CC
V
– 2.0 V
CC
V
– 1.0 V
CC
V
– 37 V
CC
PDR
Input data
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