Port 1 pin usage.
#define porta_1 1
#define MUX_select_in_0 0
#define MUX_select_in_1 1
#define MUX_select_in_2 4
#define MUX_Chip_sel_1 20
#define MUX_Chip_sel_2 21
#define MUX_Chip_sel_3 22
#define MUX_Chip_sel_4 23
#define MUX_Chip_sel_5 24
#define MUX_Chip_sel_6 25
#define MUX_Chip_sel_7 26
#define MUX_Chip_sel_8 27
#define ADC_ready_up_ 8
#define ADC_Chip_Sel_up_ 10
#define ADC_reset_up_ 9
#define ADC_ready_down_ 14
#define ADC_Chip_Sel_down_ 16
#define ADC_reset_down_ 15