- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385879 > STV9420 (意法半導(dǎo)體) MULTISYNC ON-SCREEN DISPLAY FOR MONITOR PDF資料下載
參數(shù)資料
| 型號： | STV9420 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | MULTISYNC ON-SCREEN DISPLAY FOR MONITOR |
| 中文描述： | 多頻屏幕的監(jiān)視器顯示 |
| 文件頁數(shù)： | 9/16頁 |
| 文件大?。?/td> | 228K |
| 代理商： | STV9420 |
H-SYNC
0
1
2
3
n + 1
n + 2
n + 3
n + 4
LD - 1
LD
0
1
Character
Period
LD[5:0]
Fixed
R, G, B
DD[7:0]
= 4 (min)
= 4n + 2
Given by
number
of characters
of the strips
9
Figure 5 :
Horizontal Timing
FUNCTIONAL DESCRIPTION
(continued)
IV.2 - D to ATiming
(STV9421)
The D to A converters of the STV9421 are pulse
width modulaterconverter.
The frequencyof the output signal is :F
XTAL
256
and the duty cycle is :V1[7:0]
256
per cent.
After a low pass filter, the average value of the
output is :V1 [7:0]
256
V
DD
0
1
128
255
V1[7:0]
256.t
XTAL
PWM1 Signal
t
XTAL
9
Figure 6 :
PWM Timing
V - Display Control
Ascreeniscomposedofsuccessivescanlinesgath-
ered in several strips. Each strip is defined by a
descriptor stored in memory. Atable of descriptors
allows screen compositionand different tablescan
be stored in memory at the page addresses (8
possible
≠
addresses).
Two types of strips are available :
- Spacing strip : its descriptor (see II) gives the
numberof black(FBK = 1inDISPLAYCONTROL
register) or transparent(FBK = 0) lines.
- Character strip : its descriptorgives the memory
address of the character codes correspondingto
the 1
st
displayed character. The characters and
attributes (see code format III) are defined by a
succession of codes stored in the RAM at ad-
dresses starting from the 1
st
one given by the
descriptor. A character strip can be displayed or
not by using the DE bit of its descriptor. A zoom
can be made on it byusing the ZY bit.
After the falling edge on V-SYNC, the first strip
descriptor is read at the top of the currenttable of
descriptors at the address given by P[8:6] (see
DISPLAY CONTROL register) ; if it is a spacing
strip, SL[7:0] black or transparent scan lines are
displayed;if it is a characterstrip, duringCH[5:0] x
(I + ZY) scan lines (CH[5:0]givenby theCHARAC-
TER HEIGHT register), the character codes are
read at the addresses starting from the 1
st
one
given by the descriptor until aend of line character
or the end of the scan line ; the next descriptoris
then read and the same process is repeateduntil
the next falling edge on V-SYNC.
STV9420 - STV9421
9/16
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| STV9421 | MULTISYNC ON-SCREEN DISPLAY FOR MONITOR |
| STV9422 | MULTISYNC ON-SCREEN DISPLAY FOR MONITOR |
| STV9423 | MULTISYNC ON-SCREEN DISPLAY FOR MONITOR |
| STV9424 | MULTISYNC ON-SCREEN DISPLAY FOR MONITOR |
| STV9425B | MULTISYNC ON-SCREEN DISPLAY FOR MONITOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| STV9421 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MULTISYNC ON-SCREEN DISPLAY FOR MONITOR |
| STV9422 | 制造商:Panasonic Industrial Company 功能描述:IC |
| STV9422S | 制造商:STMicroelectronics 功能描述: |
| STV9423 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MULTISYNC ON-SCREEN DISPLAY FOR MONITOR |
| STV9424 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MULTISYNC ON-SCREEN DISPLAY FOR MONITOR |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。