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SN8F5708 Datasheet(PDF) 123 Page - SONiX Technology Company |
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SN8F5708 Datasheet(HTML) 123 Page - SONiX Technology Company |
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123 / 204 page  www.sonix.com.tw SN8F5708 Series Copyright © 2019, SONiX Technology Co., Ltd. ADC Datasheet Rev. 2.4 123 CHS[4:0] Channel Pin name Remark 00000 AIN0 P4.0 - 00001 AIN1 P4.1 - 00010 AIN2 P4.2 - 00011 AIN3 P4.3 - 00100 AIN4 P4.4 - 00101 AIN5 P4.5 - 00110 AIN6 P4.6 - 00111 AIN7 P4.7 - 01000 AIN8 P5.0 - 01001 AIN9 P5.1 - 01010 AIN10 P5.2 - 01011 AIN11 P5.3 - 01100 – 10111 - - Reserved 11000 AIN12 OP0 OP0-AMP output terminal 11001 AIN13 OP1 OP1-AMP output terminal 11010 AIN14 Internal 2V or 3V or 4V Battery detector channel 11011 – 11111 - - No connection 19.2.1 Pin Configuration ADC input channels are shared with Port2, Port3, Port4 and Port5. ADC channel selection is through CHS[4:0] bit. Only one pin of Port2, Port3, Port4 and Port5 can be configured as ADC input in the same time. The pins of Port2, Port3, Port4 and Port5 configured as ADC input channel must be set input mode, disable internal pull-up and enable P2CON/P3CON/P4CON/P5CON first by program. After selecting ADC input channel through CHS[4:0], set GCHS bit as “1” to enable ADC channel function. ADC input pins are shared with digital I/O pins. Connect an analog signal to CMOS digital input pin, especially, the analog signal level is about 1/2 VDD will cause extra current leakage. In the power down mode, the above leakage current will be a big problem. Unfortunately, if users connect more than one analog input signal to Port2, Port3, Port4 or Port5 will encounter above current leakage situation. Write “1” into PnCON register will configure related pin as pure analog input pin to avoid current leakage. Note that When ADC pin is general I/O mode, the bit of P2CON, P3CON, P4CON and P5CON must be set to “0”, or the digital I/O signal would be isolated. |
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