LC7470 Sanyo Semiconductor Corporation, LC7470 Datasheet

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LC7470

Manufacturer Part Number
LC7470
Description
Character and pattern display control IC for TV screen
Manufacturer
Sanyo Semiconductor Corporation
Datasheet

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LC7470
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Overview
Character and pattern display control IC for TV screen. A
character dot configuration is 12 18. The IC has 64 inter-
nal character ROMs and displays up to 288 characters (24
characters
by a microcontroller.
Function and Applications
• Screen Display Mode: 24 characters
• Number of display characters: 288 characters (max.)
• Display control ROM (line ROM):
• Display RAM:
• Character configuration:
• Number of character types: 64 types
• Character size:
• Display start position:
• Blinking mode: Character blinking
• Display ON/OFF mode:
• Blanking mode: Entire font area (12
• Background colors: 4 (at internal SYNC. operation mode)
• External control input: Serial data input
• Synchronous signal: Selectable: Internal and External
• Internal SYNC. separation circuit available.
• Video output: NTSC-format composite output
• Superimpose function:
Ordering number:ENN3725
176 characters (used for specifying variable characters)
ON/OFF cycle; 1.0 second and 0.5 second. Duty cycle;
64 lines (line control: 24-character line)
12 (horizontal)
Horizontal direction: 4, Vertical direction: 4
Horizontal direction: 64, Vertical direction: 64
25%, 50% and 75%
Superimposes character output on composite video
output
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges,or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
12 lines) on a TV screen. It can be controlled
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
18 (vertical) dots
SANYO Electric Co.,Ltd. Semiconductor Company
18 dots)
12 lines
Character and Pattern Display Control IC
Package Dimensions
unit:mm
3059-DIP22S
22
1
0.95
71901TN (KT)/8290JN, TA, KI (AC) No.3725–1/13
0.48
21.2
[LC7470]
1.78
11
12
1.7
LC7470
SANYO : DIP22S
CMOS IC

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LC7470 Summary of contents

Page 1

... SANYO Electric Co.,Ltd. Semiconductor Company TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN Character and Pattern Display Control IC Package Dimensions unit:mm 3059-DIP22S 22 12 lines 1 0.95 18 dots) CMOS IC LC7470 [LC7470 21.2 0.48 1.78 1.7 SANYO : DIP22S 71901TN (KT)/8290JN, TA, KI (AC) No.3725–1/13 ...

Page 2

... Specifications Absolute Maximum Ratings Reommended Operating Conditions –30 to +70˚ Electrical Characteristics – +70˚C, and Timing Characteristics –30 to +70˚ Pin Assignment LC7470 25˚ 5V, unless other noted 0. – – – – – – – Top view No.3725–2/ ˚C 5 ˚ µ ...

Page 3

... Serial Data Input Timings Pin Description LC7470 No.3725–3/13 ...

Page 4

... System Block Diagram LC7470 No.3725–4/13 ...

Page 5

... The maximum display screen consists of horizontal 24 characters and vertical 12 lines. The numbe of display characters is 288 (max.). The display characters can consist of display line ROM (12 lines) data and display RAM (176 characters). • Fixed characters can be specified by making an access to the display line ROM. • Variable characters can be generated by programming the display RAM. LC7470 No.3725–5/13 ...

Page 6

... Memory Configuration (display RAM and control RAM) Memory address and data signals consist of 16 bits. Address range from 0D (000h) to 175D (0AFh) used as the display RAM. Address range from 176D (0B0h) to 191D (0BFh) is used as the display control register data area LC7470 Blinking ...

Page 7

... Memory Configuration (display RAM and control RAM) Memory address and data signals consist of 16 bits. Address range from 0D (000h) to 175D (0AFh) used as the display RAM. Address range from 176D (0B0h) to 191D (0BFh) is used as the display control register data area LC7470 Blinking ...

Page 8

... Address 189D (0BD ) the RST pin becomes active (the IC is reset), the contents of all the registers will be set to “0”. LC7470 VS VPn) n No.3725–8/13 ...

Page 9

... Address 190D (0BE ) the RST pin becomes active (the IC is reset), the contents of all the registers will be set to “0”. (4) Address 191D (0BF ) the RST pin becomes active (the IC is reset), the contents of all the registers will be set to “0”. LC7470 ...

Page 10

... Memory Configuration (display line ROM) The display line ROM address range is from 0D (000 Display Line ROM: Line Address Table LC7470 ) to 1535D (5FF ROM/ RAM Data consists of 7 bits Character code No.3725–10/13 ...

Page 11

... Only 12 low-order bits of input data to addresses from 0BCH to 0BFH have significance. Always set 4 high-order bits to ‘0’. (3) The data input format is shown below. The first 16 bits after the CS pin (active low) becomes active are processes as an address data. The subsequent groups of 16 bits are handled as the data. LC7470 No.3725–11/13 ...

Page 12

... Composite Video Signal Output Level (Internal Generation – – LC7470 =5.000V No.3725–12/13 ...

Page 13

... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of July, 2001. Specifications and information herein are subject to change without notice. LC7470 PS No.3725–13/13 ...

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