Low-Pass Filter's U1A, U1B And U1C; Table 17: Low-Pass Filter's U1A, U1B And U1C - NEC 78K0R - Cool it! User Manual

78K0R - Cool it!

3.15 Low-pass filter's U1A, U1B and U1C

The 78K0R – Cool it! board is equipped with three low-pass filter's U1A, U1B and U1C, realized by the
operational amplifier LM324M. Each input of a low-pass filter is connected to a dedicated timer output
signal of the 78K0R/KG3 microcontroller. The corresponding output signal of a low-pass filter feeds a
dedicated input of the A/D converter of the 78K0R/KG3 device. The corresponding assignment can be
found in table below.
Low Pass filter
U1A Input
Output
U1B Input
Output
U1C Input
Output
P16 / EX30 / TI01 / TO01 / INTP5
P157 / ANI15
P17 / EX31 / TI02 / TO02
P156 / ANI14
P31 / TI03 / TO03 / INTP4
P155 / ANI13

Table 17: Low-pass filter's U1A, U1B and U1C

User's Manual U18426EE1V0UM00
78K0R/KG3
I/O pin
16-bit Timer01 output
A/D converter input channel 15
16-bit Timer02 output
A/D converter input channel 14
16-bit Timer03 output
A/D converter input channel 13
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