HLW8032Pin configuration and functional descriptionVDD18RXIP27PF CF HLW8032 IN36TXVP45GND Fig.2 chip pin Diagram Table 1 Functional description of pins Pin SNPin name Input/outputDescription 1 VDD Chip power Chip power supply supply 2 IP Analog input Positive input terminal for differential signal of current, the maximal effective value of differential input voltage is ±30.9mV 3 IN Analog input Negative input terminal for differential signal of current, the maximal effective value of differential input voltage is±30.9mV 4 VP Analog input Positive input terminal of voltage signal, the maximum effective value of input voltage is ±495mV 5 GND Chip ground Grounding of chip 6 TX Digital output UART data output port 7 PF Output Outputting active high frequency rectangular wave pulse, duty ratio is 50% 8 RX Digital input UART data input port (reserved port which does not needed to used by user) REV 1.5 6/16 www.hiliwi.com