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參數(shù)資料
| 型號： | STV9425-STV9425B |
| 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)： | 7/15頁 |
| 文件大?。?/td> | 184K |
| 代理商： | STV9425-STV9425B |
FUNCTIONAL DESCRIPTION
(continued)
I.3 - Addressing Space
STV9425/25B/26 registers, RAM and ROM are
mapped in a 16Kbytes addressing space. The
mappingis the following :
0000
1024 bytes RAM
Descriptors character
codes user definable
characters
03FF
0400
Empty Space
1FFF
2000
Character
Generator ROM
32FF
3300
Empty Space
3FFF
3FF0
Internal
Registers
3FFF
I.4 - Register Set
LINE DURATION
3FF0
VSP HSP
*
0
LD5 LD4 LD3 LD2 LD1 LD0
1
1
1
0
1
1
1
VSP
: V-SYNC active edge selection
= 0 : falling egde, = 1 : rising edge
: H-SYNCactive edge selection
= 0 : falling egde, = 1 : rising edge
LD[5:0] : LINE DURATION
(numberof pixelperiodper linedivided
by 12 ie. Unit = 12 pixel periods).
HSP
HORIZONTAL DELAY
3FF1 DD7 DD6 DD5 DD4 DD3 DD2 DD1 DD0
*
0
0
0
0
DD[7:0] : HORIZONTAL DISPLAY DELAY from
the H-SYNC reference falling edge to
the 1
st
pixel position of the character
strips.Unit = 3 pixel periods.
1
0
0
0
CHARACTERS HEIGHT
3FF2
-
*
-
CH[5:0] : HEIGHT of the characterstrips in scan
lines.For each scan line,the number of
the slice which is displayed is givenby :
SLICE-NUMBER =
round
SCAN-LINE-NUMBER = Numberof the
current scan line of the strip.
-
-
CH5 CH4 CH3 CH2 CH1 CH0
0
1
0
0
1
0
SCAN
LINE
NUMBER x 18
CH[5:0]
.
DISPLAYCONTROL
3FF3
OSD
*
0
OSD
: ON/OFF(if0,R,G,B andFBLKare0).
FBK
: Fast blankingcontrol :
= 1:FBLK=1,forcingblackwherethese
is no display,
= 0:FBLKisactiveonlyduringcharacter
display.
FL[1:0] : Flashing mode :
- 00 : No flashing. The character
attributeis ignored,
- 01 : 1/1 flashing(a dutycycle = 50%),
- 10 : 1/3 flashing,
- 11: 3/1 flashing.
P[8:6]
: Address of the 1
st
descriptor of the
current displayed pages.
P[13:9] and P[5:0] = 0 ; up to 8 different
pages can be storedin theRAM.
FBK
0
FL1
0
FL0
0
-
-
P8
0
P7
0
P6
0
LOCKINGCONDITION TIME CONSTANT
3FF4
FR
AS2
AS1
*
0
0
1
FR
: FreeRunning; if= 1PLLis disabledand
the pixel frequencykeeps its last value.
AS[2:0] : Phase constant during locking
conditions.
BS[2:0] : Frequency constant during locking
conditions.
AS0
0
-
-
BS2
0
BS1
1
BS0
0
CAPTURE PROCESSTIME CONSTANT
3FF5
-
AF2
AF1
*
-
0
1
AF[2:0] : Phase constant during the capture
process.
BF[2:0] : Frequency constant during the capture
process.
AF0
1
-
-
BF2
0
BF1
1
BF0
1
INITIALPIXELPERIOD
3FF6 PP7
*
0
PP[7:0] : Value to initialize the pixel period of the
PLL.
PP6
0
PP5
1
PP4
0
PP3
1
PP2
0
PP1
0
PP0
0
FREQUENCY MULTIPLIER
3FF7
-
-
*
-
-
FM[3:0] : Frequency multiplier of the crystal
frequency to reach the high frequency
used by the PLL to derive the pixel
frequency.
-
-
-
-
FM3 FM2 FM1 FM0
1
0
1
0
STV9425 - STV9425B - STV9426
7/15
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