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參數(shù)資料
| 型號： | LM1276 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs |
| 中文描述： | 150 MHz的I2C兼容的RGB前置放大器512個(gè)字符OSD光盤，512個(gè)字符RAM和4 DAC的內(nèi)置 |
| 文件頁數(shù)： | 35/50頁 |
| 文件大?。?/td> | 2597K |
| 代理商： | LM1276 |
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Control Register Definitions
(Continued)
ROM Signature Control Register:
ROMSIGCTRL (0x840D)
Reserved
X
Check
CRS
X
X
X
X
X
X
Bit 0
This controls the calculation of the ROM signature. Setting this bit causes the ROM to be read
sequentially and a 16-bit checksum calculated over the 256 characters. The sum, modulo 65535, is
stored in the ROM Signature Data Register, and this bit is then automatically cleared.
Reserved. These should be set to zero.
Bits 7–1
ROM Signature Data:
ROMSIGDATAB1 (0x840F)
ROMSIGDATAB0 (0x840E)
16-Bit Checksum
CRC[15:0]
Bits 15–0
This is the checksum of the 256 ROM characters truncated to 16 bits (modulo 65535). All devices
with the same masked ROM will have the same checksum.
Display Window 1 Horizontal Start Address:
HSTRT1 (0x8410)
Window 1 Horizontal Start Location
HPOS1[7:0]
Bits 7–0
There are two possible OSD windows which can be displayed simultaneously or individually. This
register determines the horizontal start position of Window 1 in OSD pixels (not video signal
pixels). The actual position, to the right of the horizontal flyback pulse, is determined by multiplying
this register value by 4 and adding 30. Due to pipeline delays, the first usable start location is
approximately 42 OSD pixels following the horizontal flyback time. For this reason, we recommend
this register be programmed with a number larger than 2, otherwise improper operation may result.
Display Window 1 Vertical Start Address:
VSTRT1 (0x8411)
Window 1 Vertical Start Address
VPOS1[7:0]
Bits 7–0
This register determines the Vertical start position of the Window 1 in constant-height character
lines (not video scan lines). The actual position is determined by multiplying this register value by
2. (Note: each character line is treated as a single auto-height character pixel line, so multiple scan
lines may actually be displayed in order to maintain accurate position relative to the OSD character
cell size. (See the
Constant Character Height Mechanism
section.) This register should be set so
the entire OSD window is within the active video.
Display Window 1 Start Address:
W1STRTADRH (0x8413)
Reserved
X
X
W1STRTADRL (0x8412)
Window 1 Start Address
ADDR1[8:0]
X
X
X
X
X
Bits 8–0
This register determines the starting address of Display Window 1 in the Display Page RAM. The
power-on default of 0x00 starts Window 1 at the beginning of the Page RAM (0x8000). This first
address location always contains the SL code for the first line of Display Window 1. This register is
new for the LM1276 and allows Window 1 to start anywhere in the Page RAM rather than just at
0x8000. Note that the address this points to in Page RAM must always contain the SL code for the
first line of the window.
These bits are reserved and should be set to zero.
Bits 15–9
L
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| LM1276AAA | 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 |
| LM1279 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:110 MHz RGB Video Amplifier System with OSD |
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| LM1279A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LM1279AN | 功能描述:IC AMP RGB VIDEO SYSTEM 20-DIP RoHS:否 類別:集成電路 (IC) >> 線性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 應(yīng)用:驅(qū)動(dòng)器 輸出類型:差分 電路數(shù):3 -3db帶寬:350MHz 轉(zhuǎn)換速率:1000 V/µs 電流 - 電源:14.5mA 電流 - 輸出 / 通道:60mA 電壓 - 電源，單路/雙路(±):5 V ~ 12 V，±2.5 V ~ 6 V 安裝類型:表面貼裝 封裝/外殼:20-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:20-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) |
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