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PDF STV9420 Data sheet ( Hoja de datos )
| Número de pieza | STV9420 | |
| Descripción | (STV9420 / STV9421) MULTISYNC ON-SCREEN DISPLAY | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de STV9420 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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STV9420
STV9421
MULTISYNC ON-SCREEN DISPLAY FOR MONITOR
.. CMOS SINGLE CHIP OSD FOR MONITOR
BUILT IN 1 KBYTE RAM HOLDING :
- PAGES’ DESCRIPTORS
. - CHARACTER CODES
- USER DEFINABLE CHARACTERS
128 ALPHANUMERIC CHARACTERS OR
... GRAPHIC SYMBOLS IN INTERNAL ROM
(12 x 18 DOT MATRIX)
UP TO 26 USER DEFINABLE CHARACTERS
INTERNAL HORIZONTAL PLL (15 TO 120kHz)
PROGRAMMABLE VERTICAL HEIGHT OF
CHARACTER WITH A SLICE INTERPOLATOR
TO MEET MULTI-SYNCH REQUIREMENTS
. PROGRAMMABLE VERTICAL AND HORI-
ZONTAL POSITIONING
. FLEXIBLE SCREEN DESCRIPTION
. CHARACTER BY CHARACTER COLOR SE-
LECTION (UP TO 8 DIFFERENT COLORS)
. PROGRAMMABLE BACKGROUND (COLOR,
TRANSPARENT OR WITH SHADOWING)
. CHARACTER BLINKING
. 2-WIRES ASYNCHRONOUS SERIAL MCU
INTERFACE (I2C PROTOCOL)
. 4 x 8 BITS PWM DAC OUTPUTS ON THE
STV9421
. SINGLE POSITIVE 5V SUPPLY
DIP16
(Plastic Package)
ORDER CODE : STV9420
DESCRIPTION
The STV9420/21 is an ON SCREEN DISPLAY for
monitor. It is built as a slave peripheral connected
to a host MCU via a serial I2C bus. It includes a
display memory, controls all the display attributes
and generates pixels from the data read in its on
chip memory. The line PLL and a special slice
interpolator allow to have a display aspect which
does not depend on the line and frame frequencies.
I2C interface allows MCU to make transparent in-
ternal access to prepare the next pages during the
display of the current page. Toggle from one page
to another by programming only one register.
4 x 8 bits PWM DAC are available (STV9421) to
provide DC voltage control to other peripherals.
The STV9420/21 provides the user an easy to use
and cost effective solution to display alphanumeric
or graphic information on monitor screen.
DIP20
(Plastic Package)
ORDER CODE : STV9421
October 1995
1/16
1 page  
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STV9420 - STV9421
TIMINGS
Symbol
Parameter
Min.
Typ.
Max.
Unit
OSCILATOR INPUT : XTI (see Figure 2)
tWH
tWL
fXTAL
fPXL
Clock High Level
Clock Low Level
Clock Frequency
Pixel Frequency
RESET
tRES Reset High Level Pulse
R, G, B, FBLK (CLOAD = 30pF)
tR Rise Time (Note 1)
tF Fall Time (Note 1)
tSKEW
Skew between R, G, B, FBLK (Note 1)
I2C INTERFACE : SDA AND SCL (see Figure 3)
35 ns
35 ns
6 15 MHz
30 MHz
4 µs
5 ns
5 ns
5 ns
fSCL
tBUF
tHDS
tSUP
tLOW
tHIGH
tHDAT
tSUDAT
tF
tR
SCL Clock Frequency
Time the bus must be free between 2 access
Hold Time for Start Condition
Set up Time for Stop Condition
The Low Period of Clock
The High Period of Clock
Hold Time Data
Set up Time Data
Fall Time of SDA
Rise Time of Both SCL and SDA
0 1 MHz
500 ns
500 ns
500 ns
400 ns
400 ns
0 ns
375 ns
20 ns
Depend on the pull-up resistor
and the load capacitance
Note 1 : These parameters are not tested on each unit. They are measured during our internal qualification procedure which includes
characterization on batches comming from corners of our processes and also temperature characterization.
Figure 2
Figure 3
XTI
tWL
tW H
S T OP S TART
tBUF
S DA
tHDS
SCL
tHIGH
DATA
tHDAT
STOP
tS UDAT
tS UP
tLOW
5/16
5 Page 
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STV9420 - STV9421
FUNCTIONAL DESCRIPTION (continued)
Table 1 : ROM Character Generator
CHARACTERNUMBER C(6:0)
C(6:4)
C(3:0)
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
8
9
a
b
c
d
e
f
11/16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet STV9420.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| STV9420 | (STV9420 / STV9421) MULTISYNC ON-SCREEN DISPLAY | STMicroelectronics |
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| STV9422 | (STV9422 / STV9424) MULTISYNC ON-SCREEN DISPLAY | STMicroelectronics |
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