參數(shù)資料
型號： TVP3025-175
廠商： Texas Instruments, Inc.
英文描述： Video Interface PALETTE(三PLL，視頻接口調(diào)色器)
中文描述： 視頻接口盒（三鎖相環(huán)，視頻接口調(diào)色器）
文件頁數(shù)： 15/99頁
文件大?。?/td> 663K
代理商： TVP3025-175
2–1
2 Detailed Description
2.1
MPU Interface
The standard microprocessor interface is supported, giving the MPU direct access to the color palette RAM.
The processor interface is controlled via read and write strobes (RD, WR), five register select terminals
(RS0–RS4), the D0–D7 data terminals, and the 8/6-select terminal. The 8/6 terminal is used to select
between an 8- or 6-bit-wide data path to the color palette RAM and is provided in order to maintain
compatibility with the IMSG176. The 8/6 control is dependent on the mode of operation of the device
(TVP3025 or BT485 register emulation) and is discussed in more detail in Sections 2.3.1 and 2.4.4.
The TVP3025 provides two methods of register access through the MPU interface to program the hardware
features of the device: the TVP3025 direct register map (see Table 2–1) and the BT485 emulation register
map (see Table 2–2).
The TVP3025 direct register map is similar to the register map of the TVP3020. The index register and the
data register provide access to the TVP3025 indirect register map (see Table 2–3) which allows
programming of the device features. In general, the index register must first be loaded with the target
address value. Successive reads or writes from and to the data register then access the target location.
2.1.1
The BT485 emulation register map provides access to many of the same device features through a BT485
compatible direct access map. This mode is provided to allow previously developed software drivers written
for the BT485 device to be used without modification when upgrading the TVP3025. The most popular
features of the BT485 are supported by the TVP3025. Section 2.4.17 gives details on TVP3025 compatibility
with the BT485 and functions not supported. When accessing the BT485 emulation registers, only features
which are supported by the BT485 and have a counterpart on the TVP3025 can be utilized. If additional
TVP3025 features are to be used, they must be accessed through the TVP3025 register map.
BT485 Register Emulation
The BT485 register emulation function uses a set of internal registers to store the information programmed
through the BT485 emulation register map. Each register has a flag that indicates when it has been written
to, and a state machine monitors all the flags. When a flag has been set, the state machine performs the
required sequence of operations to properly update the TVP3025 indirect registers. This internal translation
is performed using a succession of byte-writes and bit read-modify-writes as required. During the
translation, the TVP3025 indirect register map can not be accessed. The BT485 emulation status register
bit 6 indicates when the internal translation is in progress.
相關(guān)PDF資料
PDF描述
TVP3030-175 Video Interface PALETTE Exract(1600×1200，24位真彩色視頻接口調(diào)色器)
TVP3030-220 Video Interface PALETTE Exract(1600×1200，24位真彩色視頻接口調(diào)色器)
TVP3030-250 Video Interface PALETTE Exract(1600×1200，24位真彩色視頻接口調(diào)色器)
TVP3409-170 Advanced Video Interface PALETTE(雙PLL，視頻接口調(diào)色器真彩色CMOS)
TVP3409-135 Advanced Video Interface PALETTE(雙PLL，視頻接口調(diào)色器真彩色CMOS)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TVP3025-175PCE 制造商:TI 制造商全稱:Texas Instruments 功能描述:Video Interface Palette
TVP3025-220MDN 制造商:TI 制造商全稱:Texas Instruments 功能描述:Video Interface Palette
TVP3025-220PCE 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Video DAC with Color Palette (RAMDAC)
TVP3026 制造商:TI 制造商全稱:Texas Instruments 功能描述:Video Interface Palette
TVP3026-135AMDN 制造商:TI 制造商全稱:Texas Instruments 功能描述:Video Interface Palette
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