HMP8156 Intersil Corporation, HMP8156 Datasheet - Page 20

• Manufacturer Part Number: HMP8156
• Description: Ntsc/pal Encoder
• Manufacturer: Intersil Corporation

NUMBER
NUMBER
NUMBER
NUMBER
BIT
BIT
BIT
BIT
7-0
7-0
7-2
1-0
7-0
Line 284 Caption
Data
(Second Byte)
Assert BLANK
Output Signal
(Horizontal)
Reserved
Assert BLANK
Output Signal
(Horizontal)
Negate BLANK
Output Signal
(Horizontal)
FUNCTION
FUNCTION
FUNCTION
FUNCTION
This register is cascaded with the closed caption_284A data register and they are read
out serially as 16 bits during line 281, 284, or 335 if line 284 captioning is enabled. Bit
D0 of the 284A data register is shifted out first.
This 8-bit register is cascaded with Start H_Blank High Register to form a 10-bit
start_horizontal_blank register. It specifies the horizontal count (in 1x clock cycles) at
which to start ignoring pixel data each scan line. The leading edge of HSYNC is count
020
This 2-bit register is cascaded with Start H_Blank Low Register to form a 10-bit
start_horizontal_blank register. It specifies the horizontal count (in 1x clock cycles) at
which to start ignoring pixel data each scan line. The leading edge of HSYNC is count
020
This 8-bit register specifies the horizontal count (in 1x clock cycles) at which to start
inputting pixel data each scan line. The leading edge of HSYNC is count 000
ister is ignored unless BLANK is configured as an output.
H
H
TABLE 21. CLOSED CAPTION_284B DATA REGISTER
. This register is ignored unless BLANK is configured as an output.
. This register is ignored unless BLANK is configured as an output.
TABLE 23. START H_BLANK HIGH REGISTER
TABLE 22. START H_BLANK LOW REGISTER
TABLE 24. END H_BLANK REGISTER
SUB ADDRESS = 13
SUB ADDRESS = 20
SUB ADDRESS = 21
SUB ADDRESS = 22
HMP8156
20
DESCRIPTION
DESCRIPTION
DESCRIPTION
DESCRIPTION
H
H
H
H
H
. This reg-
000000
RESET
RESET
RESET
RESET
STATE
STATE
STATE
STATE
4A
7A
80
11
H
H
B
H
B