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M 6 8 E V B 9 0 8 Q L 4
1 2 / 0 4 / 0 3
USER_COMPONENTS
Two push switches, potentiometer, and LED indicator are provided for user application.
JP1 USER OPTIONS
The JP1 option block provides a method to enable or connect user components to be applied
with the HC08 I/O ports. The development board user should be familiar with the input and
output application so that port conflicts do not occur. Following is the option connection
reference table:
POSITION
USER COMPONENT
HC08 PORT
PORT
ALTERNATE PORT
DIRECTION
1
IRQ Push Switch
PTA2/IRQ*/KBI2
Input
MCU PORT pin 3,
MON_EN,
CYCLONE
2
3
4
RESET Push Switch
RV1 Potentiometer
D1 Indicator (active low)
PTA3/RST*/KBI3
PTB3/AD5
PTB0/TCH0
Input
Input
Output
MCU PORT pin 4
MCU PORT pin 6
MCU PORT pin 5
Note: RESET switch, IRQ switch, and LED indicator are active logic low.
RESET Switch
The RESET switch applies an active low signal to the HC08 PTA3/RST*/KBI3 pin if the JP1
option position 2 is installed. When applying the CYCLONE cable and port, this jumper should
be installed to enable the pull-up resistor on the RESET signal.
IRQ Switch
The IRQ switch applies an active low signal to the HC08 PTA2/IRQ*/KBI2 pin if the JP1 option
position 1 is installed.
RV1 User Potentiometer
The User Potentiometer provides an adjustable linear voltage from 0 to 5V. The voltage signal
is made available to HC08 port PTB3 / AD5 analog input by the JP1 position 3 option jumper
installed. The HC08 ADC module can measure the input voltage to allow user application
response to the input voltage level.
8
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