User manual

PIC18F87J72 Evaluation Board User’s Guide
DS51990A-page 20 © 2011 Microchip Technology Inc.
Figure 3-4 shows the function of the S3 key, which is used to change the internal gain
of the second input channel. The gains can be changed from 1 to 32 with each press
of the key. When pressing the S3 key repeatedly, the gain configurations of the Sigma
Delta ADC will sequentially change from 1, 2, 4, 8, 16, 32 and then back to 1.
FIGURE 3-4: Configuring Internal PGA Gain for Current Channel.
Press S3 to
configure
current gain
Display showing channel gain