STV9426 SGS-Thomson-Microelectronics, STV9426 Datasheet

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STV9426

Manufacturer Part Number
STV9426
Description
MULTISYNC ON-SCREEN DISPLAY FOR MONITOR
Manufacturer
SGS-Thomson-Microelectronics
Datasheet

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STV9426
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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 I
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. I
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
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 (I
8 x 8 BITS PWM DAC OUTPUTS (STV9425)
4 x 8 BITS PWM DAC OUTPUTS (STV9425B)
SINGLE POSITIVE 5V SUPPLY
2
C interface allows MCU to make
MULTISYNC ON-SCREEN DISPLAY FOR MONITOR
2
C PROTOCOL)
2
C bus. It
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.
STV9425 - STV9425B
ORDER CODES : STV9425 - STV9425B
ORDER CODE : STV9426
(Plastic Package)
(Plastic Package)
SHRINK24
DIP16
STV9426
1/15

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STV9426 Summary of contents

Page 1

... 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 2 C bus. It (Plastic Package) ORDER CODE : STV9426 STV9426 DIP16 1/15 ...

Page 2

... STV9425 - STV9425B - STV9426 PIN CONNECTIONS SDIP24 (STV9425) PWM0 PWM7 RESERVED 1 24 PWM1 PWM6 2 23 FBLK 3 22 TEST VSYNC HSYNC PXCK 7 18 GND CKOUT RESET 8 17 XTAL OUT 9 16 SDA XTAL OUT XTAL SCL PWM2 11 14 ...

Page 3

... CONTROLLER RES FBLK STV9426 CKOUT 6 HS YNC 3 VSYNC 2 RESET 11 S TV9426 STV9425 - STV9425B - STV9426 V TEST RAM 4K ROM Pa ge Descriptors + (128 chara cte rs) Use r Defined Cha BUS INTERFACE GND SCL SDA ...

Page 4

... STV9425 - STV9425B - STV9426 ABSOLUTE MAXIMUM RATINGS Symbol Parameter V Supply Voltage DD V Input Voltage IN T Operating Ambient Temperature oper T Storage Temperature stg ELECTRICAL CHARACTERISTICS ( Symbol Parameter SUPPLY V Supply Voltage DD I Supply Current DD INPUTS SCL, SDA, TEST, RESET, V-SYNC and H-SYNC ...

Page 5

... 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 STV9425 - STV9425B - STV9426 Min. Typ. Max ...

Page 6

... STV9425 - STV9425B - STV9426 FUNCTIONAL DESCRIPTION The STV9425/25B/26display processor operation 2 is controlled by a host MCU via the I is fully programmab le through 16 internal read/write registers and performs all the display functions by generating pixels from data stored in its internal memory. After the page downloading ...

Page 7

... CH[5:0] : HEIGHT of the character strips in scan lines. For each scan line, the number of the slice which is displayed is given by : SLICE-NUMBER = SCAN LINE NUMBER x 18 round CH[5:0] SCAN-LINE-NUMBER = Number of the current scan line of the strip. STV9425 - STV9425B - STV9426 DISPLAY CONTROL 3FF3 OSD FBK FL1 * 0 0 OSD : ON/OFF ( and FBLK are 0) ...

Page 8

... STV9425 - STV9425B - STV9426 FUNCTIONAL DESCRIPTION (continued) PULSE WIDTH MODULATOR 0 3FF8 V07 V06 V05 V04 V03 V02 V01 V00 * V0[7:0] : Digital value of the 1 converter (Pin1). PULSE WIDTH MODULATOR 1 3FF9 V17 V16 V15 V14 V13 V12 V11 V10 * V1[7:0] : Digital value of the 2 PWMDAC (Pin2) ...

Page 9

... The converters of the STV9425/25B/26are pulse width modulater converter. The frequency of F XTAL the output signal is : 256 Vi[7:0] and the duty cycle is : per cent. 256 STV9425 - STV9425B - STV9426 After a low pass filter, the average value of the [7:0] Vi output is : ...

Page 10

... STV9425 - STV9425B - STV9426 FUNCTIONAL DESCRIPTION (continued) After the falling edge on V-SYNC, the first strip descriptor is read at the top of the current table of descriptors at the address given by P[9:0] (see DISPLAY CONTROL register). spacing strip, SL[7:0] black or transparent scan lines are displayed character strip, during CH[5: ZY) ...

Page 11

... FUNCTIONAL DESCRIPTION (continued) Table 1 : ROM Character Generator CHARACTER NUMBER C(6:0) C(6:4) 0 C(3: STV9425 - STV9425B - STV9426 11/15 ...

Page 12

... STV9425 - STV9425B - STV9426 FUNCTIONAL DESCRIPTION (continued User Definable Character The STV9425/25B/26 allows the user to dynami- cally define character(s) for his own needs (for a special LOGO for example). Like the ROM charac- ters, a UDC is made pixels x 18 slices dot matrix, but one more slice is added for the vertical shadowing when several UDCs are gathered to make a special great character (see Figure 8) ...

Page 13

... NNNN NNNY NNNN NNNN 6 7 NNNN NNNN Note : 1. Case of A[2: (001) and B[2: (100 Valid Time Constants STV9425 - STV9425B - STV9426 In this case the PLL is stable if coefficient). Figure 12 : Time Response of the PLL/Charac- teristic Equation Solutions (with 0 . Complex Solutions) PLL B 19 Frequency . f 1 ...

Page 14

... STV9425 - STV9425B - STV9426 PACKAGE MECHANICAL DATA (STV9425 - STV9425B) 24 PINS - PLASTIC SHRINK DIP Millimeters Dimensions Min. Typ 0.51 3.05 3.30 B 0.36 0.46 B1 0.76 1.02 C 0.23 0.25 D 22.61 22.86 E 7.62 E1 6.10 6.40 e 1.778 e1 7. 2.54 3.30 14/15 Stand-off SDIP24 Max. Min. 5.08 0.020 4.57 0.120 0.56 0.0142 1.14 0.030 0.38 0.0090 23.11 0.890 8.64 0.30 6.86 0.240 10.92 1.52 3.81 0. .015 ...

Page 15

... C Patent. Rights to use these components the I C Standard Specifications as defined by Philips. SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. STV9425 - STV9425B - STV9426 Max. Min. 0.020 1.65 0.030 0 ...

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