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參數(shù)資料
| 型號： | TLC34076-170 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Color-Palette(170MHz,與TLC34075兼容，另具24位和16位真彩色模式) |
| 中文描述： | 顏色調(diào)色板（170MHz的，與TLC34075兼容，另具24位和16位真彩色模式） |
| 文件頁數(shù)： | 19/60頁 |
| 文件大?。?/td> | 408K |
| 代理商： | TLC34076-170 |
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2–2
2.2.1
To load the color palette RAM, the MPU must first write to the address register (write mode) with the address
where the modification is to start. This action is followed by three successive writes to the palette-holding
register with eight bits each of red, green, and blue data. After the blue data write cycle, the three bytes of
color are concatenated into a 24-bit word and written to the color palette RAM location specified by the
address register. The address register then increments to point to the next color palette RAM location, which
the MPU may modify by writing another sequence of red, green, and blue data bytes. A block of color values
in consecutive locations may be written by writing the start address and performing continuous red, green,
and blue write cycles until the entire block has been written.
Writing to the Color Palette RAM
2.2.2
Reading from the color palette RAM is performed by writing the location to be read to the address register.
This action initiates a transfer from the color palette RAM into the holding register followed by an increment
of the address register. Three successive MPU reads from the holding register produce red, green, and blue
color data (six or eight bits, depending on the 8/6 mode) for the specified location. Following the blue read
cycle, the contents of the color palette RAM at the address specified by the address register are copied into
the holding register, and the address register is again incremented. As with writing to the color palette RAM,
a block of color values in consecutive locations may be read by writing the start address and performing
continuous red, green, and blue read cycles until the entire block has been read.
Reading From the Color Palette RAM
2.2.3
The 8-bit palette page register provides high-speed color changing by removing the need for color palette
RAM reloading. When using one, two, or four bit planes, the additional planes are provided by the palette
page register, e.g., when using four bit planes, the pixel inputs specify the lower four bits of the color palette
RAM address with the upper four bits being specified by the palette register. This provides the capability of
selecting from 16 palette pages with only one chip access, thus allowing all the screen colors to be changed
at the line frequency. A bit-to-bit correspondence is used; therefore, in the above configuration, palette page
register bits 7 through 4 map onto color palette RAM address bits 7 through 4, respectively. This is listed
in Table 2–2.
Palette Page Register
Since there is only one bit of overlay data in the 5-5-5 true color modes, the page register is used to fill the
seven remaining MSBs (same as one bit plane in Table 2–2). All eight bits need to be zero in order to enable
the true color mode. The additional bits from the palette page register are inserted before the read mask
and are subject to masking.
Table 2–2. Allocation of Palette Page Register Bits
NUMBER OF
BIT PLANES
MSB
8
M
M
M
4
P7
P6
P5
2
P7
P6
P5
1
P7
P6
P5
Pn = nth bit from palette page register
M = bit from pixel port
COLOR PALETTE RAM ADDRESS BITS
LSB
M
M
M
M
M
P4
P4
P4
M
M
P3
P3
M
M
P2
P2
M
M
M
P1
2.3
The TLC34076-170 provides a maximum of five clock inputs. Three are dedicated to TTL inputs; the other
two can be selected as either one ECL input or two extra TTL inputs. The TTL and ECL inputs can be used
for video rates up to 135 MHz. The dual-mode clock input (ECL/TTL) is primarily an ECL input but can be
used as a TTL-compatible input if the input clock selection register is so programmed. The clock source used
at power up is CLK0; an alternative source can be selected by software during normal operation. This
Input/Output Clock Selection and Generation
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PDF描述 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TLC34076-85FN | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述: |
| TLC34077 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Video Interface Palette Data Manual |
| TLC34077135FN | 制造商:TI 功能描述:* |
| TLC352 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LinCMOSE DUAL DIFFERENTIAL COMPARATOR |
| TLC352CD | 功能描述:校驗(yàn)器 IC Dual Differential RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
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