HMP8116 Intersil Corporation, HMP8116 Datasheet - Page 39

• Manufacturer Part Number: HMP8116
• Description: Ntsc/pal Video Decoder
• Manufacturer: Intersil Corporation

power plane. The analog power plane should be connected
to the board’s normal V
though a low-resistance ferrite bead, such as a Ferroxcube
5659065-3B, Fair-Rite 2743001111, or TDK BF45-4001. The
ferrite bead provides resistance to switching currents,
improving the performance of HMP8116. A single 47 F
capacitor should also be used between the analog power
plane and the ground plane to control low-frequency power
supply ripple.
If a separate linear regulator is used to provide power to the
analog power plane, the power-up sequence should be
designed to ensure latchup will not occur. A separate linear reg-
ulator is recommended if the power supply noise on the V
pins exceeds 200mV.
Analog Signals
Traces containing digital signals should not be routed over,
under, or adjacent to the analog output traces to minimize
crosstalk. If this is not possible, coupling can be minimized
by routing the digital signals at a 90 degree angle to the ana-
log signals. The analog input traces should also not overlay
the V
ply rejection.
CHROMA
AA
CVBS3/Y
CVBS1
CVBS2
R4
75
power plane to maximize high-frequency power sup-
R3
75
0.1 F
R2
75
C4
1.0 F
C6
R1
75
CC
1.0 F
0.1 F
ANTI-ALIAS
C8
FILTER
C7
power plane at a single point
ANTI-ALIAS
FILTER
12K
R6
C2
1.0 F
C1
1.0 F
C3
1.0 F
FIGURE 21. HMP8116 REFERENCE SCHEMATICS
28
19
76
29
78
8
9
7
6
5
U1
YIN
YOUT
LCAP
CCAP
REF_CAP
CVBS 1
C
RSET
CVBS 2
CVBS 3 (Y)
HMP8116
VBIVALID
HMP8116
INTREQ
DVALID
BLANK
HSYNC
VSYNC
RESET
CLK2
FIELD
AA
SCL
SDA
P15
P14
P13
P12
P11
P10
P9
P8
P7
P6
P5
P4
P3
P2
P1
P0
39
EVALUATION BOARD
HMPVIDEVAL/ISA
The HMPVIDEVAL/ISA evaluation board allows connecting
the HMP8116 into a PC ISA slot for evaluation. It includes
the HMP8115 NTSC/PAL decoder, 3MB of VRAM, and a
NTSC/PAL encoder. The board accepts composite or S-
video input and displays video on a standard TV. The ISA
bus and evaluation software allow easy performance evalua-
tion of the HMP8116 using tools such as the Tektronix
VM700 video test system.
RELATED APPLICATION NOTES
Application Notes are also available on the Harris Multime-
dia web site at http://www.semi.harris.com/mmedia.
AN9644: Composite Video Separation Techniques
AN9716: Widescreen Signalling
AN9717: YCbCr to RGB Considerations
AN9728: BT.656 Video Interface for ICs
AN9738: VMI Video Interface for ICs
51
50
49
48
47
45
43
42
64
63
60
58
57
56
55
54
65
66
67
71
70
61
34
40
41
38
44
V
RESET
CC
R8
50
C12
15pF
P[15..8]
P[7..0]
27MHz
RP1
10K
V
CC
27MHz
R16
4K
V
CC
R17
4K
VBIVALID
DVALID
INTREQ
BLANK
HSYNC
VSYNC
FIELD
SDA
SCL