SENA ProBee-ZE20S User Manual
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ProBee-ZE20S User Guide Rev.1.10
30
GPIO_11
Digital Output with LED(CR14) Display (Active High)
Digital Input with Button Switch (SW12, Active Low or Active High)
Analog Input with Temperature Sensor (U6)
31
GPIO_10
Digital Output with LED(CR13) Display (Active High)
Digital Input with Button Switch (SW11, Active Low or Active High)
Analog Input with Variable Register (VR2)
32
GPIO_9
Digital Output with LED(CR12) Display (Active High)
Digital Input with Button Switch (SW10, Active Low or Active High)
Analog Input with Variable Register (VR1)
* NOTE: GPIO_14 is driven low at pin reset or power-on-reset, the module will boot up in bootloader.
6.3.5
LEDs (CR12-19)
The development board has 8 LEDs for digital output. To enable the LEDs, the GPIO_OUT (SW20) switch
should be set to LED_ON. The LEDs are turned on when the related GPIO pins of the ZE20S are high.
Note: The ADC_0~3 switches (SW4~7) should be placed to EXT_0~3.
6.3.6
Button Switches (SW10-17)
The development board has 8 button switches for digital input. The switches can be configured as active
high or active low with the GPIO_IN (SW19) switch.
Note: The ADC_0~3 switches (SW4~7) should be placed to EXT_0~3.
Note: The LED On/Off switch (SW20) should be placed to LED_OFF.
Note: If the GPIO_IN (SW19) is set to Active High, GPIO pull up/down option should be set to Pull-Down
(ATS41=0). If the GPIO_IN (SW19) is set to Active Low, GPIO pull up/down option should be set to Pull-
Up. (ATS41=1)
6.3.7
Variable Resistors (VR1, VR2)
There are two variable resistors for analog inputs on the development board. The analog inputs can be
read with the GPIO_9 and GPIO_10. To enable the variable resistors, the ADC_0 and ADC_1 switches
should be placed to VR_0 and VR_1.
Note: The LED On/Off switch (SW20) should be placed to LED_OFF.
6.3.8
Temperature Sensor
The GPIO_11 of the ZE20S is routed to the temperature sensor. The relationship between temperature
and analog input is as follows:
Temperature(℃) ={ Volt(mV) -600(mV)} * 0.1(℃/mV)