lf3370 LOGIC Devices Incorporated, lf3370 Datasheet - Page 9

• Manufacturer Part Number: lf3370
• Description: High-definition Video Format Converter
• Manufacturer: LOGIC Devices Incorporated

DEVICES INCORPORATED
used to clear HF
operation (see HBLANK discussion).
HBLANK
HBLANK is used to replace portions of the
input data with user-defined blanking
levels. When HBLANK is LOW, blanking
level words are injected into the data
stream immediately after the Input LUT
section regardless of this section being
used or not. While HBLANK is LOW,
blanking level words are continually
injected into the datapath with user-
defined blanking words. Blanking words
F
IGURE
A
D
13
13
13
13
11.
0
13
13
13
and HF
Coef Bank 0
Coef Bank 3
Coef Bank 6
M
ATRIX
13
13
13
1
26
26
26
during normal
M
B
ULTIPLIER AND
13
13
13
13
13
13
13
are injected on the next rising clock edge
when HBLANK is LOW. In addition,
HBLANK clears flags HF
resets a 20-bit incrementing counter (0 -
1,048,575). If a HIGH to LOW transition
on HBLANK is detected on a rising edge of
clock, HF
counter is reset on the following rising
edge of clock (see Figure 10). Key Channel
blanking may be independently enabled
or disabled using Congifuration Register 1
(see Table 6).
Coef Bank 1
Coef Bank 4
Coef Bank 7
Coef Bank 9
K
13
13
13
13
EY
26
26
26
26
S
0
and HF
CALER
C
1
13
13
13
are cleared and the
9
High-Definition Video Format Converter
13
13
13
0
and HF
Coef Bank 2
Coef Bank 5
Coef Bank 8
13
13
13
1
26
26
26
and
26
26
26
26
26
26
26
26
26
HF
HF
that are set when the pre-programmed
HF
bit incrementing counter value. For each
flag, one user-defined 20-bit count value
can be programmed. When HF
count value is equal to the counter value,
HF
of clock. Once the flags are set, they must
be reset if they are needed again. The
counter will increment by one at the rate
of CLK and can be reset by HBLANK.
The counter will continue to loop if not
Video Imaging Products
0
0
0
0
/HF
and HF
or HF
or HF
1
and Counter
28
28
28
26
1
1
count value is equal to the 20-
is set on the next rising edge
1
are two independent flags
20(MSB)
20(MSB)
20(MSB)
20(MSB)
R S
R S
R S
R S
03/13/2001–LDS.3370-F
L
L
L
L
LF3370
0
13
or HF
13
13
13
A
B
C
D
’
1
’
’
’