Q: Whats the usage of logic buffer( NC7SP126) in this design, how to troubleshooting it? I am troubleshooting my devices which are subjected to battery drain issue. I  have never worked with this buffer chip before. Can Anyone can tell me what is the purpose of adding this chip to the Microprocessor? Will malfunction of this buffer chip affect battery life of the design? 
The design used 3.6V lithium battery. MCU is MSP430F155, operate under 2.8V.
Any input will be appreciated, Thanks!


A: The purpose of this buffer is to isolate the battery from the A/D converter on P6.3. You have to set P1.4 to high to measure the battery voltage, to low to cut the connection and save battery charge.
