參數(shù)資料
型號(hào)： TLC34075A-85
廠商： Texas Instruments, Inc.
英文描述： Color-Palette(85MHz,視頻接口調(diào)色器)
中文描述： 顏色調(diào)色板（85MHz，視頻接口調(diào)色器）
文件頁(yè)數(shù)： 25/53頁(yè)
文件大小： 394K
代理商： TLC34075A-85
2-12
General control register:
Pixel read mask register:
Palette address register:
Palette holding register:
Test register:
03h
FFh
xxh
xxh
(Pointing to color palette red value)
2.6
The TLC34075A provides two clock signals for controlling the frame buffer interface: SCLK and VCLK.
SCLK can be used to clock out data directly from the VRAM shift registers. Split shift register transfer
functionality is also supported. VCLK is used to clock and synchronize control inputs like HSYNC, VSYNC,
and BLANK.
Frame Buffer Interface
The pixel data presented at the inputs is latched at the rising edge of SCLK in normal mode or the rising edge
of CLK0 in VGA pass-through mode. Control inputs HSYNC, VSYNC, and BLANK are sampled and latched
at the falling edge of VCLK in normal mode, while HSYNC, VSYNC, and VGABLANK are latched at the rising
edge of CLK0 in VGA pass-through mode. Both data and control signals are lined up at the DAC outputs
to the monitors through the internal pipeline delay, so external glue logic is not required. The outputs of the
DACs are capable of directly driving a 37.5-
load, as in the case of a doubly terminated 75-
cable. See
Figures 2–7 and 2–8 for nominal output levels.
2.7
The DAC outputs are controlled by current sources (three for IOG and two each for IOR and IOB) as shown
in Figure 2–6. In the normal case, there is a 7.5-IRE difference between blank and black levels, which is
shown in Figure 2–7. If a 0-IRE pedestal is desired, it can be selected by resetting bit 4 of the general control
register (see Section 2.11.3). The video output for a 0-IRE pedestal is shown in Figure 2–8.
Analog Output Specifications
IOG
RL
～
15 pF
G <0:7>
BLANK
(IOG Only)
SYNC
VAA
Figure 2–6. Equivalent Circuit of the IOG Current Output
相關(guān)PDF資料
PDF描述
TLC3544IDWR 5-V ANALOG, 3-/5-V DIGITAL, 14-BIT, 200-KSPS, 4-/8-CHANNELS SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH 0-5 V (PSEUDODIFFERENTIAL) INPUTS
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TLC3544IDWRG4 5-V ANALOG, 3-/5-V DIGITAL, 14-BIT, 200-KSPS, 4-/8-CHANNELS SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH 0-5 V (PSEUDODIFFERENTIAL) INPUTS
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