有关HC5523, HC5515评估板的操作

Operation of the HC5523, HC5515 Evaluation Board
TM
Operation of the HC5523, HC5515
Evaluation Board
Application Note December 1996 AN9632



Features Ground Connections
The HC5523/15EVAL has two separate grounds designated as
Includes the Ringing Relay
AGND and BGND. AGND