Intel MCS48 User Manual page 373

8279
SCAN
TIMING
SCAN
WAVEFORMS
.J
L
L
Si
ENCODED
SCAN
S
2
S3
1
DISPLAY
WAVEFORMS
A.
A0-A3
V
BLANK
V
EHIGH
Ji
CODE*
il
B0-B3
\f
/EHIGH
Jl
RL0-RL7
LA
f
80
1
/
X
BLANK
\l
co
r
A
ASSUME INTERNAL FREQUENCY =
100 kHz
SOtCY =
10^S
X
BLANK
CODE*
\
I
1-
—
CONDITIONAL WRITE TO
FIFO
W-RLo
SELECTED, LATCHED
'BLANK CODE
IS
EITHER
ALL
O'sOR ALL 1'sOR20 HEX
X
I
RLo RL, RL
2
RL3 RL
4
RL
5
RLe
RL
7
RL RL, RL
2
RL3
RL« RL
5
Rlj RL
7
X
BLANK
V
co
r
a
x
r
BLANK
CODE*
\
)C
RETURN
LINES ARE SAMPLED ONE
AT A TIME AS SHOWN.
NOTE:
SHOWN
IS
ENCODED SCAN
LEFT ENTRY
S
2
-S
3
ARE NOT
SHOWN
BUT THEY
ARE SIMPLY
Si
DIVIDED BY
2
AND
4
8-83
00742A