P4S-341 User Manual > Peripherals(JP1)
2019-03-14 Sollae Systems page 8 of 17
Peripherals (JP1)
Analog Input: ADC
P4S-341 provides 6 ADC input channels.
To use the ADC, the reference voltage input is required. When JP4 (VDDA-AREF) jumper is
connected, 3.3V is connected to the reference voltage input pin.
※ VDD-AREF jumper is connected on the P4S-341 when shipped from the factory.
When directly inputting the reference voltage without using JP4, input it with the AREF pin.
※ Caution: Inputting a voltage to the AREF pin while the JP4 (VDDA-AREF) jumper is connected may
cause the product to malfunction. Therefore, before connecting the voltage to the AREF pin, make
sure that the JP4 is NOT connected.
Specification of an ADC port is as follows:
Parameter Value
Resolution 12 bits (0 ~ 4095)
Input Type DC Voltage (Max. 3.3V)
Number of Channel 6 channels
Interfaced Pin Label AREF, AD0 ~ 5
Hardware Timer: HT
P4S-341 provides 4 hardware timers called HT.
Specification of HT is as follows:
Parameter Value
Mode Output mode(toggle, pulse, PWM), Capture mode
Unit ms(millisecond) or us(microsecond)
Number of Channel 4 channels
Interfaced Pin Label HT0 ~ 3
Digital Inputs/Outputs: UIO
P4S-341 provides 24 digital I/O ports including 22 universal I/O ports (numbered 0 to 21) and 2 LED
ports (numbered 30 and 31). Two LEDs on board are assigned to number 30 and 31. The pins
numbered 0 to 21 can be available to be set digital input or output but note that pins which are
shared with serial interfaces (numbered 0 to 13) cannot be available to use a digital input or output
while they are being used by the serial communication (UART, SPI and I2C).
Electrical Characteristics of Digital I/O
Parameter Description Min.[V] Max.[V] Current
VIH HIGH level input 2.31 - -
VIL LOW level input 00.99 -
VOH HIGH level output 2.9 - ±8mA(CMOS)
VOH HIGH level output 2.4 - ±8mA(TTL)
VOL LOW level output - 0.4 ±8mA(CMOS/TTL)
