Rainbow Electronics ATmega3290P_V - Manual (Page 247)

247
ATmega329/3290/649/6490
2552H–AVR–11/06
Figure 110. Boundary-scan Cell for Bi-directional Port Pin with Pull-up Function.
D Q D Q
G
0
1
0
1
D Q D Q
G
0
1
0
1
0
1
0
1
D Q D Q
G
0
1
Port Pin (PXn)
Vcc EXTEST To Next Cell ShiftDR
Output Control (OC)
Pullup Enable (PUE)
Output Data (OD)
Input Data (ID)
From Last Cell UpdateDR ClockDR
FF2 LD2
FF1 LD1
LD0 FF0