5.9 Analog Front-End Pin-Level Function Multiplexing
(Ask a Question)Table 5-2 describes the relationships between the various internal signals found in the analog front-end (AFE) and how they are multiplexed onto the external package pins. Note that, in general, only one function is available for those pads that have numerous functions listed. The exclusion to this rule is when a comparator is used; the ADC can still convert either input side of the comparator.
| Pin | ADC Channel | Dir.-In Option | Prescaler | Current Mon. | Temp. Mon. | Compar. | LVTTL | SDD MUX | SDD |
|---|---|---|---|---|---|---|---|---|---|
| ABPS0 | ADC0_CH1 | — | ABPS0_IN | — | — | — | — | — | — |
| ABPS1 | ADC0_CH2 | — | ABPS1_IN | — | — | — | — | — | — |
| ABPS2 | ADC0_CH5 | — | ABPS2_IN | — | — | — | — | — | — |
| ABPS3 | ADC0_CH6 | — | ABPS3_IN | — | — | — | — | — | — |
| ABPS4 | ADC1_CH1 | — | ABPS4_IN | — | — | — | — | — | — |
| ABPS5 | ADC1_CH2 | — | ABPS5_IN | — | — | — | — | — | — |
| ABPS6 | ADC1_CH5 | — | ABPS6_IN | — | — | — | — | — | — |
| ABPS7 | ADC1_CH6 | — | ABPS7_IN | — | — | — | — | — | — |
| ABPS8 | ADC2_CH1 | — | ABPS8_IN | — | — | — | — | — | — |
| ABPS9 | ADC2_CH2 | — | ABPS9_IN | — | — | — | — | — | — |
| ADC0 | ADC0_CH9 | Yes | — | — | — | CMP1_P | LVTTL0_IN | — | — |
| ADC1 | ADC0_CH10 | Yes | — | — | — | CMP1_N | LVTTL1_IN | SDDM0_OUT | — |
| ADC2 | ADC0_CH11 | Yes | — | — | — | CMP3_P | LVTTL2_IN | — | — |
| ADC3 | ADC0_CH12 | Yes | — | — | — | CMP3_N | LVTTL3_IN | SDDM1_OUT | — |
| ADC4 | ADC1_CH9 | Yes | — | — | — | CMP5_P | LVTTL4_IN | — | — |
| ADC5 | ADC1_CH10 | Yes | — | — | — | CMP5_N | LVTTL5_IN | SDDM2_OUT | — |
| ADC6 | ADC1_CH11 | Yes | — | — | — | CMP7_P | LVTTL6_IN | — | — |
| ADC7 | ADC1_CH12 | Yes | — | — | — | CMP7_N | LVTTL7_IN | SDDM3_OUT | — |
| ADC8 | ADC2_CH9 | Yes | — | — | — | CMP9_P | LVTTL8_IN | — | — |
| ADC9 | ADC2_CH10 | Yes | — | — | — | CMP9_N | LVTTL9_IN | SDDM4_OUT | — |
| ADC10 | ADC2_CH11 | Yes | — | — | — | — | LVTTL10_IN | — | — |
| ADC11 | ADC2_CH12 | Yes | — | — | — | — | LVTTL11_IN | — | — |
| CM0 | ADC0_CH3 | Yes | — | CM0_H | — | CMP0_P | — | — | — |
| CM1 | ADC0_CH7 | Yes | — | CM1_H | — | CMP2_P | — | — | — |
| CM2 | ADC1_CH3 | Yes | — | CM2_H | — | CMP4_P | — | — | — |
| CM3 | ADC1_CH7 | Yes | — | CM3_H | — | CMP6_P | — | — | — |
| CM4 | ADC2_CH3 | Yes | — | CM4_H | — | CMP8_P | — | — | — |
| SDD0 | ADC0_CH15 | — | — | — | — | — | — | — | SDD0_OUT |
| SDD1 | ADC1_CH15 | — | — | — | — | — | — | — | SDD1_OUT |
| SDD2 | ADC2_CH15 | — | — | — | — | — | — | — | SDD2_OUT |
| TM0 | ADC0_CH4 | Yes | — | CM0_L | TM0_IO | CMP0_N | — | — | — |
| TM1 | ADC0_CH8 | Yes | — | CM1_L | TM1_IO | CMP2_N | — | — | — |
| TM2 | ADC1_CH4 | Yes | — | CM2_L | TM2_IO | CMP4_N | — | — | — |
| TM3 | ADC1_CH8 | Yes | — | CM3_L | TM3_IO | CMP6_N | — | — | — |
| TM4 | ADC2_CH4 | Yes | — | CM4_L | TM4_IO | CMP8_N | — | — | — |
Note:
- ABPSx_IN: Input to active bipolar prescaler channel x.
- CMx_H/L: Current monitor channel x, high/low side.
- TMx_IO: Temperature monitor channel x.
- CMPx_P/N: Comparator channel x, positive/negative input.
- LVTTLx_IN: LVTTL I/O channel x.
- SDDMx_OUT: Output from sigma-delta DAC MUX channel x.
- SDDx_OUT: Direct output from sigma-delta DAC channel x.