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TO NEXT CELL
DATA TO
SYSTEM
LOGIC
Figure 21-4. Observe-Only Input Pin Cell (I.Obs)
1 — EXTEST | CLAMP
0 — OTHERWISE
G1
OUTPUT CONTROL
FROM SYSTEM
1
LOGIC
1
Figure 21-5. Output Control Cell (IO.CTL)
MOTOROLA
D
C
MUX
SHIFT DR
MUX
G1
1
MUX
1
FROM LAST CELL
MPC823e REFERENCE MANUAL
IEEE 1149.1 Test Access Port
INPUT
PIN
G1
1
1
S
TO NEXT CELL
D
D
C
C
CLOCK DR
UPDATE DR
TO OUTPUT
BUFFER
21-5
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