LM1276 National Semiconductor Corporation, LM1276 Datasheet - Page 40

• Manufacturer Part Number: LM1276
• Description: 150 Mhz I2c Compatible Rgb Preamplifier With Internal 512 Character Osd Rom, 512 Character Ram And 4 Dacs
• Manufacturer: National Semiconductor Corporation

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Pre-Amplifier Interface Registers
Center Frequency:
ABL Control 0
ABL Control 1
ABL Control 2
ABL Control 3
Peak Control TEXT
Bits 3–0
Bits 7–4
Bits 3–0
Bits 7–4
Bits 3–0
Bits 7–4
Bits 3–0
Bits 7–4
Bits 3–0
Bits 7–4
Bits 2–0
Bits 7–3
Reserved and should be set to zero.
These 4 bits control the Center Frequency adjustment of the Hi-Brite window video signal for
enhancement.
These bits determine the ABL current limiting threshold for ABL setting 0.
Reserved and should be set to zero.
These bits determine the ABL current limiting threshold for ABL setting 1.
Reserved and should be set to zero.
These bits determine the ABL current limiting threshold for ABL setting 2.
Reserved and should be set to zero.
These bits determine the ABL current limiting threshold for ABL setting 3.
Reserved and should be set to zero.
These bits determine the amount of overshoot for the TEXT mode
Reserved and should be set to zero.
Center Frequency
CENTF[3:0]
Reserved
Reserved
Reserved
Reserved
Reserved
RSV
RSV
RSV
RSV
RSV
EMPHASIS_CENTF(0x85C1)
PEAKCNTLTXT (0x85C8)
ABLCTRL0 (0x85C4)
ABLCTRL1 (0x85C5)
ABLCTRL2 (0x85C6)
ABLCTRL3 (0x85C7)
(Continued)
40
Res’d
RSV
RSV
RSV
Res’d
RSV
TEXT MODE OVERSHOOT
ABL Current
ABL Current
ABL Current
ABL Current
ABL0[3:0]
ABL1[3:0]
ABL2[3:0]
ABL3[3:0]
TM_OVRSHT[2:0]
Res’d
RSV
Res’d
RSV