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PDF STV9426 Data sheet ( Hoja de datos )
| Número de pieza | STV9426 | |
| Descripción | (STV9425 / STV9426) MULTISYNC ON-SCREEN DISPLAY FOR MONITOR | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de STV9426 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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STV9425 - STV9425B
STV9426
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)
. 50MHz MAXIMUM PIXEL CLOCK
. 2-WIRES ASYNCHRONOUS SERIAL MCU
INTERFACE (I2C PROTOCOL)
. 8 x 8 BITS PWM DAC OUTPUTS (STV9425)
4 x 8 BITS PWM DAC OUTPUTS (STV9425B)
. SINGLE POSITIVE 5V SUPPLY
8 x 8 bits or 4 x 8 bits PWM DAC are available to
provide DC voltage control to other peripherals.
The STV9425/25B/26provides the user an easy to
use and cost effective solution to display alphanu-
meric or graphic information on monitor screen.
SHRINK24
(Plastic Package)
ORDER CODES : STV9425 - STV9425B
DESCRIPTION
TheSTV9425/25B/26is an ON SCREEN DISPLAY
for monitor. It is built as a slave peripheral con-
nected 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 internal access to prepare the next
pages during the display of the current page. Tog-
gle from one page to another by programming only
one register.
December 1997
DIP16
(Plastic Package)
ORDER CODE : STV9426
1/15
1 page  
STV9425 - STV9425B - STV9426
TIMINGS
Symbol
Parameter
OSCILATOR INPUT : XTI (see Figure 2)
TWH
T WL
FXTAL
FPXL
RESET
Clock High Level
Clock Low Level
Clock Frequency
Pixel Frequency
TRES
Reset Low Level Pulse
R, G, B, FBLK (CLOAD = 30pF)
TRISE
Rise Time (Note 1)
TFALL
Fall Time (Note 1)
TSKEW Skew between R, G, B, FBLK (Note 1)
I2C INTERFACE : SDA AND SCL (see Figure 3)
FSCL
TBUF
THDS
TSUP
TLOW
THIGH
THDAT
TSUDAT
TF
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
TR Rise Time of Both SCL and SDA
Min.
Typ.
Max.
Unit
20
20
TBD
ns
ns
15 MHz
50 MHz
4 µs
5 ns
5 ns
5 ns
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 characterizat ion.
Figure 2
TWL
XTI
TWH
Figure 3
STOP START
TBUF
SDA
THDS
SCL
THIGH
DATA
THDAT
STOP
TSUDAT
TSUP
TLOW
5/15
5 Page 
STV9425 - STV9425B - STV9426
FUNCTIONAL DESCRIPTION (continued)
Table 1 : ROM Character Generator
CHARACTER NUMBER 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
11/15
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet STV9426.PDF ] | |
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