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8279 SCAN TIMING
SCAN WAVEFORMS
ENCODED
SCAN
S,
S,
u
u
u
S'-U
u
DECODED
SCAN
S,
S,
u
u
u
u
DISPLAY WAVEFORMS
So
S,
Ao-
A
3
ACTIVE
HIGH
80-
8
3
ACTIVE
HIGH
RLo-
RL7
f-------640~s=84tCy·------·
BLANK
CODE'
A(O)
NOTE:
SHOWN
IS
ENCODED
SCAN
LEFT
ENTRY
BLANK
CODE·
~·S3
ARE NOT SHOWN BUT THEY
ARE
SIMPLY
81
DIVIDED
BY
2 AND 4
9-81
u
u
u
u
ASSUME INTERNAL FREQUENCV = 100 kHz
SOtCy=10~s
A(1)
·BLANK
CODe
IS
EITHER
ALL
a's OR
ALL
1',
OR
20
HEX
L
L
L
Lf
AFN-Q0742A-12