X1
X1 OUT - U5 MCLK
U4 PA5 - U5 SCLK
U5 VDD - C7 P1
U4 PA7 - U5 SDATA
U5 CAP/2.5V - C9 P1
U5 VDD - C7 P1
U5 COMP - C10 P1
U5 VDD - C7 P1
U5 VOUT - R17 P1
U4 PA4 - U5 ~FSYNC
U5 AGND - C7 P2
U5