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參數資料
| 型號： | LM1246AAA/NA |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 3 CHANNEL, VIDEO PREAMPLIFIER, PDIP24 |
| 封裝： | PLASTIC, DIP-24 |
| 文件頁數： | 33/51頁 |
| 文件大小： | 2794K |
| 代理商： | LM1246AAA/NA |
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Control Register Definitions (Continued)
2.
Then, the 3-bit address obtained from B0AD[2:0], B1AD[2:0], B2AD[2:0] and B3AD[2:0] are used to select four of the eight
2 or 4 color ROM banks as shown in Table 29. Resulting ROM Bank Address. The BxAD[2:0] column gives the range of
three-bit addresses and the next two columns give the corresponding ROM address range and the character type.
TABLE 29. Resulting ROM Bank Address
BxAD[2:0]
Character ROM Address Range
ROM Character Type
000b
0x000–0x03F
2 Color
001b
0x040–0x07F
2 Color
010b
0x080–0x0BF
2 Color
011b
0x0C0–0x0FF
4 Color
100b
0x100–0x13F
2 Color
101b
0x140–0x17F
2 Color
110b
0x180–0x1BF
2 Color
111b
0x1C0–0x1FF
4 Color
3.
In summary, the final ROM character address is formed by concatenating (combining end to end) the three bits of the
corresponding Bank Address Register with the lower six bits of the original character address in RAM. Since just the two
highest bits of the Page RAM address are used, only 4 banks can be addressed at one time.
Fade In/Fade Out Interval Register:
FADE_INTVL (0x8429)
Vertical Interval
Horizontal Interval
V_INTVL[3:0]
H_INTVL[3:0]
Bits 7–4
These three bits determine the interval for fading in or fading out the OSD window in the vertical
direction.
Bits 3–0
These three bits determine the interval for fading in or fading out the OSD window in the horizontal
direction.
Pre-Amplifier Interface Registers
Blue Channel Gain:
BGAINCTRL (0x8430)
Res’d
Blue Gain
X
BG[6:0]
Bits 6–0
This register determines the gain of the blue video channel. This affects only the blue channel
whereas the contrast register (0x8433) affects all channels.
Bit 7
Reserved and should be set to zero.
Green Channel Gain:
GGAINCTRL (0x8431)
Res’d
Green Gain
X
GG[6:0]
Bits 6–0
This register determines the gain of the green video channel. This affects only the green channel
whereas the contrast register (0x8433) affects all channels.
Bit 7
Reserved and should be set to zero.
Red Channel Gain:
RGAINCTRL (0x8432)
Res’d
Red Gain
X
RG[6:0]
LM1246
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM1246AAC/NA | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:IC 150MHZ RGB PREAMP 1246 DIP24 |
| LM1246AAC/NA/NOPB | 功能描述:IC PREAMP RGB 150MHZ 24-DIP RoHS:是 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產品變化通告:Product Discontinuation 07/Mar/2011 標準包裝:3,000 系列:OMNITUNE™ 類型:調諧器 應用:移動電話，手機，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應商設備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064 |
| LM1246NA | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs |
| LM1247 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs |
| LM1247AAG/NA | 功能描述:IC PREAMP CMOS 150MHZ 24DIP RoHS:否 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產品變化通告:Product Discontinuation 07/Mar/2011 標準包裝:3,000 系列:OMNITUNE™ 類型:調諧器 應用:移動電話，手機，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應商設備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064 |
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