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MOTOROLA M68040 USER’S MANUAL 6- 7
DATA FROM 
SYSTEM LOGIC
FROM
LAST
CELL
CLOCK DR UPDATE DR2
(DRVCTL.X)
SHIFT DR TO NEXT CELL
TO OUTPUT
BUFFER
1 = EXTEST, DRVCTL.T,
AND SHUTDOWN
0 = OTHERWISE
1
MUX
1
G1
1D
C1
UPDATE DR1
(DRVCTL.X)
TO OUTPUT
DRIVER SELECT
1D
C1
1D
C1
1
MUX
1
G1
Figure 6-3. Output Latch Cell (O.Latch)
FROM
LAST
CELL
TO
SYSTEM
LOGIC
SHIFT DR
CLOCK DR
TO NEXT CELL
1D
C1 1
MUX
1
G1
INPUT
PIN
Figure 6-4. Input Pin Cell (I.Pin)
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