DEC VT220 Technical Manual page 111

TO
VIDEO
OUTPUT
Ul ATR H
(SERIAL DATA)
...
\CHRl
"
H-CHR7 H /
p·S
y
CONVERSION
CHRO H
-
CBLANK l
-I
Sl
CLR CK CillNH
IClR}
Y
i
Or
DOT ClK H
T5l
I
T3H
II!
T2L
CONVERSION - - - - '
CONTROL
CURS H
, 1
CBLANK H
{
FROM {
CHAR
GEN
FROM
ATIRIBUTE
CIRCUITS
FROM
TIMING
GEN
FROM
9007
FROM
I
BLANK
CIRCUITS
{
Figure 6-22 Video
Converter Block Diagram
INH
LATCH
TO
P-5
CONVERTER
HR LD l
lOAD
FIF
CURSOR
SKEW
FIF
~
r
T3H
FROM
i'
TIMING _T_2_L
+-_-t_ _-t_-.;
GEN
L .._ . /
lOOT ClK H
FROM CG BLANK H
BLANK
- - - - - L__
...J
CIRCUiTS
'SHARES SAME PHYSICAL COMPONENT
ILS174 LATCH} AS ATTRI3UTE LATCH 4 IN CHARACTER
GENERATOR, AND BLANK LATCH IN BLANK CIRCUITS.
C B L A = D - J N K H
FROM [
9007
L
CURS H
r-"'--t--.L-+-+-t--l--~
Figure 6-23
Conversion Control Block Diagram
6-27