LM1253A National Semiconductor, LM1253A Datasheet - Page 44

• Manufacturer Part Number: LM1253A
• Description: Monolithic Triple 180 MHz I2C CRT Pre-amp With Integrated Analog On Screen Display (OSD) Generator
• Manufacturer: National Semiconductor

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Control Register Definitions
PRE-AMP INTERFACE REGISTERS
Blue Channel Gain Control Register (I
REGISTER NAME: BGAINCTRL (8430h)
Bit 7
Bits 6–0: Blue Channel Gain Control. These seven bits determine the gain for the Blue Channel.
Bit 7:
Green Channel Gain Control Register (I
REGISTER NAME: GGAINCTRL (8431h)
Bit 7
Bits 6–0: Green Channel Gain Control. These seven bits determine the gain for the Green Channel.
Bit 7:
Red Channel Gain Control Register (I
REGISTER NAME: RGAINCTRL (8432h)
Bit 7
Bits 6–0: Red Channel Gain Control. These seven bits determine the gain for the Red Channel.
Bit 7:
Contrast Control Register (I
REGISTER NAME: CONTRCTRL (8433h)
Bit 7
Bits 6–0: Contrast Gain Control. These six bits determine the overall gain of all three channels.
Bit 7
Blue Bias Clamp Pulse Amplitude Control Register (I
REGISTER NAME: BBIASCTRL (8434h)
Bit 7
Bits 7–0: Blue Channel Bias Clamp Pulse Amplitude Control. These six bits determine the bias clamp value for its pulse ampli-
Green Bias Clamp Pulse Amplitude Control Register (I
REGISTER NAME: GBIASCTRL (8435h)
Bit 7
Bits 7–0: Green Channel Bias Clamp Pulse Amplitude Control. These six bits determine the bias clamp value for its pulse am-
RSV
RSV
RSV
RSV
GC7
BC7
GG6
BG6
RG6
CG6
BC6
GC6
RESERVED.
RESERVED.
RESERVED.
RESERVED.
tude.
plitude.
GG5
BG5
RG5
CG5
GC5
BC5
BG4
GG4
RG4
CG4
GC4
BC4
2
C address 8433h).
GG3
RG3
CG3
GC3
BG3
BC3
GG2
2
BG2
RG2
CG2
BC2
GC2
2
C address 8432h).
C address 8430h).
2
C address 8431h).
GG1
BG1
RG1
CG1
GC1
BC1
(Continued)
BG0
GG0
RG0
CG0
GC0
BC0
Bit 0
Bit 0
Bit 0
Bit 0
2
Bit 0
Bit 0
C address 8434h).
2
C address 8435h).
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