參數(shù)資料
型號(hào): MTV018
廠商: Electronic Theatre Controls, Inc.
英文描述: IC TXRX PHY 10/100 3.3V 48LQFP
中文描述: 超級(jí)屏幕顯示器
文件頁(yè)數(shù): 6/16頁(yè)
文件大?。?/td> 139K
代理商: MTV018
6/16
MTV018 Revision 4.0 10/21/1999
MTV018
MYSON
TECHNOLOGY
cal display height control register(CH6-CH0).The algorithm of repeating character line display are shown as
Table 2 and Table 3. The programmable vertical size range is 270 lines to maximum 2130 lines.
The vertical display center for full screen display could be figured out according to the information of vertical
starting position register (VERTD) and VFLB input. The vertical delay starting from the leading edge of VFLB,
is calculated with the following equation:
Vertical delay time = ( VERTD * 4 + 1 ) * H Where H = one horizontal line display time
Note:" v " means the nth line in the character would be repeated once, while " - " means the nth line in the
character would not be repeated.
3.4 Horizontal display control
The horizontal display control is used to generate control timing for horizontal display based on double char-
acter width bit (CWS), horizontal positioning register (HORD), horizontal resolution register (HORR), and
HFLB input. A horizontal display line consists of (HORR*12) dots which include 360 dots for 30 display char-
acters and the remaining dots for blank region. The horizontal delay starting from HFLB leading edge is calcu-
lated with the following equation,
Horizontal delay time = ( HORD * 6 + 49) * P - phase error detection pulse width
Where P = One pixel display time = One horizontal line display time / (HORR*12)
3.5 Phase lock loop (PLL)
On-chip PLL generates system clock timing (VCLK) by tracking the input HFLB and horizontal resolution reg-
ister (HORR). The frequency of VCLK is determined by the following equation:
TABLE 2. Repeat line weight of character
CH6 - CH0
CH6,CH5=11
CH6,CH5=10
CH6,CH5=0x
CH4=1
CH3=1
CH2=1
CH1=1
CH0=1
Repeat Line Weight
+18*3
+18*2
+18
+16
+8
+4
+2
+1
TABLE 3. Repeat line number of character
Repeat Line
Weight
+1
+2
+4
+8
+16
+17
+18
Repeat Line #
0
-
-
-
-
-
v
v
1
-
-
-
v
v
v
v
2
-
-
v
-
v
v
v
3
-
-
-
v
v
v
v
4
-
v
-
-
v
v
v
5
-
-
-
v
v
v
v
6
-
-
v
-
v
v
v
7
-
-
-
v
v
v
v
8
v
-
-
-
v
v
v
9
-
-
-
v
v
v
v
10
-
-
v
-
v
v
v
11
-
-
-
v
v
v
v
12
-
v
-
-
v
v
v
13
-
-
-
v
v
v
v
14
-
-
v
-
v
v
v
15
-
-
-
v
v
v
v
16
-
-
-
-
v
v
v
17
-
-
-
-
-
-
v
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