PGAʾ:

1. ȽP˺NѹP˵ѹNˣȽ״̬λλ
   ʹ : PGA0_INP0:XPA5
               PGA0_INN0:XPA4
               PGA0_OUT :XPA3

2. ʹڲŴŴPѹ
   ʹ : PGA0_INP0:XPA5
               PGA0_INN0:XPA4
               PGA0_OUT :XPA3

    : 8
