Motorola MPC860 PowerQUICC User Manual page 1002

Part VI. Debug and Test
Figure 38-3 shows the logic conÞguration for an output signal boundary scan cell.
1 Ñ EXTEST | CLAMP
0 Ñ OTHERWISE
G1
DATA FROM
SYSTEM
LOGIC
Figure 38-3. Output Signal Boundary Scan Cell (Output Cell)
Figure 38-4 shows the logic conÞguration for an observe-only input signal boundary scan
cell.
DATA TO
SYSTEM
LOGIC
Figure 38-4. Observe-Only Input Signal Boundary Scan Cell (Input Cell)
38-4
SHIFT DR
1
MUX
1
FROM LAST CELL
TO NEXT CELL
D
C
CLOCK DR
MPC860 PowerQUICC UserÕs Manual
TO NEXT CELL
G1
1
D
MUX
1 C
CLOCK DR
G1
1
MUX
1
FROM LAST CELL
TO OUTPUT
BUFFER
D
C
UPDATE DR
INPUT
PIN
SHIFT DR
MOTOROLA