LC74786 Sanyo Semiconductor Corporation, LC74786 Datasheet

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LC74786

Manufacturer Part Number
LC74786
Description
On-screen display controller
Manufacturer
Sanyo Semiconductor Corporation
Datasheet
Ordering number : EN5729A
Overview
The LC74786, LC74786M, and LC74786JM are on-
screen display controller CMOS ICs that display
characters and patterns on the TV screen under
microprocessor control. These ICs support 12
characters and can display 12 lines by 24 characters of
text.
Features
• Display format: 24 characters by 12 rows (Up to 288
• Character format: 12 (horizontal) 18 (vertical) dots
• Character sizes: Three sizes each in the horizontal and
• Characters in font: 128 (128 characters, one spacing
• Initial display positions: 64 horizontal positions and 64
• Blinking: Specifiable in character units
• Blinking types: Two periods supported: About 1.0
• Blanking: Over the whole font (12 18 dots)
• Background color: 8 colors (internal synchronization
• Line background color
• External control input: 8-bit serial input format
• On-chip sync separator circuit
• Video outputs - NTSC, PAL, PAL-N, PAL-M, NTSC
• Package
characters)
vertical directions
character, and one transparent spacing character)
vertical positions
second and about 0.5 second
mode): 2f
— Can be set for 3 lines
— Line background color: 8 colors (internal
4.43, and PAL60 format composite video outputs
— 24-pin plastic DIP-24S (300 mil)
— 24-pin plastic MFP-24 (375 mil)
— 24-pin plastic MFP-24S (300 mil)
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
synchronization mode): 2f
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
SC
and 4f
SC
SC
and 4f
SC
18-dot
Package Dimensions
unit: mm
3067-DIP24S
unit: mm
3045B-MFP24
unit: mm
3112-MFP24S
LC74786, 74786M, 74786JM
On-Screen Display Controller
[LC74786JM]
[LC74786M]
[LC74786]
30698HA (OT) No. 5729-1/23
SANYO: MFP24S
SANYO: DIP24S
SANYO: MFP24
CMOS IC

Related parts for LC74786

LC74786 Summary of contents

Page 1

... Ordering number : EN5729A Overview The LC74786, LC74786M, and LC74786JM are on- screen display controller CMOS ICs that display characters and patterns on the TV screen under microprocessor control. These ICs support 12 characters and can display 12 lines by 24 characters of text. Features • Display format: 24 characters by 12 rows (Up to 288 characters) • ...

Page 2

... V 2 Power supply DD LC74786, 74786M, 74786JM Ground connection (digital system ground) These pins are used either to connect the crystal and capacitors used to form an external crystal oscillator circuit to generate the internal synchronizing signals input an external clock signal (2fsc or 4fsc mask option, the Xtal MUTE input pin ...

Page 3

... Power supply (+ Note: Both V 1 pins must be connected to the power supply. DD LC74786, 74786M, 74786JM Composite video signal output Ground connection (analog system ground) Composite video signal input Power supply (+5 V: digital system power supply) Video signal input to the internal sync separator circuit (Used as either the horizontal synchronizing signal or the composite synchronizing signal input when the internal sync separator circuit is not used ...

Page 4

... Allowable Operating Ranges Parameter Supply voltage Input high-level voltage Input low-level voltage Pull-up resistance Composite video signal input voltage Input voltage Oscillator frequencies Note: Applications must be especially cautious about noise when using the Xtal LC74786, 74786M, 74786JM Symbol Conditions V max V 1 and ...

Page 5

... Background color high level (other than blue) Blue background 1 low level Blue background 2 low level Blue background 1 and 2 high level Frame level 0 Frame level 1 Character level Note: Blue background are option settings. LC74786, 74786M, 74786JM unless otherwise specified. DD Symbol Pin I CV leak1 ...

Page 6

... Timing Characteristics –30 to +70°C, V Parameter Minimum input pulse width Data setup time Data hold time One word write time Serial Data Input Timing LC74786, 74786M, 74786JM ±0 Symbol Conditions t SCLK W(SCLK (The period when CS is high) W(CS SU(CS) t SIN SU(SIN) ...

Page 7

... System Block Diagram LC74786, 74786M, 74786JM No. 5729-7/23 ...

Page 8

... LC74786/M/JM locks into the display character data write mode, and another first byte cannot be written. When the CS pin is set high, the LC74786/M/JM is set to the COMMAND0 (display memory write address setup mode) state. LC74786, 74786M, 74786JM ...

Page 9

... V0 1 • Second byte DA Register State 7 — 1 Second byte identification code 6 — — Display memory column address ( hexadecimal Note: All registers are set to 0 when the LC74786/M/JM is reset by the RST pin. LC74786, 74786M, 74786JM Contents Function Contents Function Notes Notes No. 5729-9/23 ...

Page 10

... Note: All registers are set to 0 when the LC74786/M/JM is reset by the RST pin. LC74786, 74786M, 74786JM Contents Function Contents Function Notes When this command is input, the LC74786/M/JM locks in the display character data write mode until the CS pin goes high. Notes No. 5729-10/23 ...

Page 11

... H (in 525-line systems (in 625-line systems) 3 VP3 VP2 VP1 1 VP0 0 0 (LSB) 1 Note: All registers are set to 0 when the LC74786/M/JM is reset by the RST pin. LC74786, 74786M, 74786JM Contents Function VS20 0 1 1H/dot 2H/dot 3H/dot 1H/dot VS10 0 1 1H/dot 2H/dot 3H/dot 1H/dot Contents ...

Page 12

... Tc: Period of the oscillator connected to OSCIN/OSCOUT in operating 4 HP4 1 mode HP3 HP2 HP1 1 HP0 0 0 (LSB) 1 Note: All registers are set to 0 when the LC74786/M/JM is reset by the RST pin. LC74786, 74786M, 74786JM Contents Function HS20 Tc/dot 2 Tc/dot 3 Tc/dot 1 Tc/dot HS10 Tc/dot 2 Tc/dot 3 Tc/dot 1 Tc/dot Contents Function n HP ...

Page 13

... Reverse video off Reverse video on 0 Character display off 0 DSPON 1 Character display on Note: All registers are set to 0 when the LC74786/M/JM is reset by the RST pin. LC74786, 74786M, 74786JM Contents Function Contents Function BLK0 0 1 Blanking off Character size Frame size Complete fill in Notes This bit must be set to 0 ...

Page 14

... CB 1 Color burst signal output stopped 0 PH2 2 PH2 PH1 PH0 1 1 Note: All registers are set to 0 when the LC74786/M/JM is reset by the RST pin. LC74786, 74786M, 74786JM Contents Function NP1 NP0 Format 0 0 NTSC 0 1 PAL PAL 1 1 PAL NTSC4. PAL60 ...

Page 15

... SN2 SN1 SN0 1 Note: All registers are set to 0 when the LC74786/M/JM is reset by the RST pin. LC74786, 74786M, 74786JM Contents Function SEP output OUT 0 Sync separator signal 1 Low-level output 0 High-level output 1 ST pulse signal is held at the pedestal level OUT Contents Function ...

Page 16

... Mask invalid 0 3H (for NTSC) 1 MSKSEL 1 20H (for NTSC) 0 Frame level 0 only (V 0 EGL 1 Two-stage frame level (V Note: All registers are set to 0 when the LC74786/M/JM is reset by the RST pin. LC74786, 74786M, 74786JM Contents Function Contents Function ) BK0 0 and Notes Switches the SEP (pin 20) input ...

Page 17

... LNA0 LPA2 LPA2 LPA1 LPA1 LPA0 1 1 Note: All registers are set to 0 when the LC74786/M/JM is reset by the RST pin. LC74786, 74786M, 74786JM Contents Function Contents Function LNA1 LNA0 Specified line not change the line background 0 1 Line Line Line Line ...

Page 18

... LNB0 LPB2 LPB2 LPB1 LPB1 LPB0 1 1 Note: All registers are set to 0 when the LC74786/M/JM is reset by the RST pin. LC74786, 74786M, 74786JM Contents Function Contents Function LNB1 LNB0 Specified line not change the line background 0 1 Line Line Line Line ...

Page 19

... LNC0 LPC2 LPC2 LPC1 LPC1 LPC0 1 1 Note: All registers are set to 0 when the LC74786/M/JM is reset by the RST pin. LC74786, 74786M, 74786JM Contents Function Contents Function LNC1 LNC0 Specified line not change the line background 0 1 Line Line Line Line ...

Page 20

... The display consists of 12 lines of 24 characters 288 characters can be displayed. The number of characters that can be displayed is reduced when enlarged characters are displayed. Display memory addresses are specified as row ( decimal) and column ( decimal) addresses. Display Screen Structure (display memory addresses) 12 Rows LC74786, 74786M, 74786JM 24 Characters No. 5729-20/23 ...

Page 21

... Frame Pedestal Background color (other than blue) low RSL Blue background color 1 low RSL V : Color burst low CBL V : Sync SN LC74786, 74786M, 74786JM Output voltage (1) [V] Output voltage (2) [V] 2.67 2.87 2.45 2.64 2.09 2.29 2.09 2.29 1.75 1.95 1.61 1.80 1 ...

Page 22

... Sample Application Circuits (When the LC74786/M/JM is used in conjunction with a single-chip Y/C circuit.) • Circuit Using an External System Clock Input Micro- controller • Circuit Using a Crystal Oscillator Micro- controller LC74786, 74786M, 74786JM No. 5729-22/23 ...

Page 23

... This catalog provides information as of March, 1998. Specifications and information herein are subject to change without notice. LC74786, LC74786M, LC74786JM input signal: sync tip = 1 selected for the internal generated video signals by option settings, the IN must be connected with the correct polarity ...

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