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參數(shù)資料
| 型號： | STV9432TAP |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 100MHz OSD FOR MONITOR INCLUDING BEAM CURRENTS, VIDEO TIMING ANALYZER AND PWMs |
| 中文描述： | 100MHz的OSD用于顯示器包括離子束電流，視頻定時(shí)分析儀和PWM |
| 文件頁數(shù)： | 8/18頁 |
| 文件大?。?/td> | 186K |
| 代理商： | STV9432TAP |
STV9432
8/18
7 - SOFTWARE RESET REGISTER
To perform a software I
2
C reset of the device, set the RST bit to ONE.
This bit will be automatically reset by the device.
Software Reset will put all Write registers at their default power-on value, and reset all internal logic
blocks except the I
2
C bus interface itself. It will not change the RAM contents.
SELXTAL
This bit must be set to ONE in order to operate the oscillator in the external crystal
mode.
In its ZERO default state, this bit enables the internal RC mode oscillator.
8 - ON-SCREEN DISPLAY
The STV9432 on-screen display is able to display
any line of characters (character strip) anywhere
in the screen.
Character strings are programmed by the MCU in
RAM via I
2
C bus. Character shapes are coded in
the internal ROM font. Character strips may be
adjacent or separated by vertical spaces (Spacing
strips).
Consequently, one display page is made of a list
of Character strips and Spacing strips.
A Top Margin and a Left Margin are programmable
in dedicated registers.
8.1 - RAM PROGRAMMING
8.1.1 - Two kinds of Data:
Strip Descriptors and Character Codes
An OSD screen is made of a number of Character
and Spacing strips.
Two groups of Data make one OSD screen:
- a Strip Descriptors list,
- Text strings - one per Character strip.
Figure 4. Display Page: List of Character and Spacing strips
Each Strip is associated with a 2 bytes Strip
Descriptor.
There are two Strip Descriptors:
- The Character Strip Descriptors containing the
Text string Ram address of the Character Strip,
- The Spacing Strip Descriptors which specify the
vertical space height.
In the example shown in Figure 4 on page 8, the
OSD screen, is made of 9 strips.
In RAM, there is:
- one list of 9 Strip descriptors
(size = 9 x 2 bytes = 18 bytes),
- 6 Text strings, each of them made of the character
codes from the line of text.
Text strings can be programmed anywhere in
RAM. The Descriptor list can be located at 16 dif-
ferent addresses in RAM. The address is defined
in the Display Control Register. It is consequently
possible to store up to 16 different pages in RAM.
The current Displayed page is specified in the Dis-
play Control Register. It refers to a given Page
Descriptor list.
403F
-
-
-
-
-
-
-
RST
TOP MARGIN
L
Text line number one
Text line number two
Text line number three
Text line number four
Text line number five
Text line number six
Strip 1 : Character Strip
Strip 2 : Character Strip
Strip 3 : Spacing Strip
Strip 4 : Character Strip
Strip 5 : Spacing Strip
Strip 6 : Character Strip
Strip 7 : Character Strip
Strip 8 : Character Strip
Strip 9 : Spacing Strip (Bottom Margin)
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