msm7664 Oki Semiconductor, msm7664 Datasheet - Page 16

• Manufacturer Part Number: msm7664
• Description: Ntsc/pal Digital Video Decoder
• Manufacturer: Oki Semiconductor

¡ Semiconductor
FUNCTIONAL DESCRIPTION
Analog Unit
1) Analog input select: Compatible with composite video signals and S-video signals. Input
2) Clamp function:
3) AGC amp:
4) A/D converter:
List of Analog Input Conditions
Blank spaces: non-selectable,
M[1] pin setting,
Composite-1 Input*
Composite-2 Input
Composite-3 Input
Composite-4 Input
Composite-5 Input
S-video-1 Input
S-video-2 Input
All inputs Off
Input Signal Control Pin
INS[2:0]
[000]
[001]
[010]
[011]
[100]
[101]
[110]
[111]
0: external mode, 1: internal register mode
selection can be switched by register control via the I
external pins. (See the below chart for pin combinations.)
When the LSI is used in Composite video mode, input clocks or do
resetting after setting S-video mode (101), (110) before setting Composite
video mode.
An analog clamp and a digital pulse clamp can be used.
Analog clamp
Analog clamp Æ Digital clamp (hybrid clamp)
Digital clamp
Only the digital clamp can be set as the pedestal clamp.
# Related register MRB[3:2]
The AGC function operates depending upon the input level.
Manual gain setting is also possible. This AGC function operates at 2
stages, the analog unit and digital unit. Digital decoded data is output
in conformance with ITU-RBT.601.
Refer to the explanation of M[1] pin (pin 90).
# Related register ADC2[6:4]
Two internal 8-bit A/D converters sample at twice the pixel frequency.
(Sampling at the pixel frequency is possible by changing the register
setting.)
# Related register ADC1[2:0]
ADC1[2:0]
Register
[000]
[001]
[010]
[011]
[100]
[101]
[110]
[111]
*: register default setting after LSI reset
Luminance
Composite
VIN1
Luminance
Composite
VIN2
Composite
VIN3
OFF (Sleep)
Input Pin
Composite
VIN4
Composite
Chroma
VIN5
Chroma
VIN6
PEDL7664-01
2
C-bus or by
ADC Selection
MSM7664
ON
OFF
ON
ON
ON
ON
ON
ON
ON
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OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON