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PDF LC74770 Data sheet ( Hoja de datos )
| Número de pieza | LC74770 | |
| Descripción | On-Screen Display Controller LSI | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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Ordering number : EN4248A
CMOS LSI
LC74770M
On-Screen Display Controller LSI
Overview
The LC74770M is a CMOS LSI that implements on-
screen display, a function that displays characters and
patterns on display screens such as camcorder viewfinder
screens under microprocessor control. This LSI displays
12-dot by 18-dot characters.
Package Dimensions
unit: mm
3112-MFP24S
[LC74770M]
Features
• Display format: 24 characters by 12 rows (up to
288 characters)
• Characters displayed: Up to 288 characters
• Character format: 12 (horizontal) × 18 (vertical)
• Characters in font: 128
• Character sizes: Normal and double
• Initial display positions: 64 horizontal positions and
64 vertical positions
• Reverse video function: Characters can be displayed in
reverse video specified in units of individual characters.
• Blinking types: In character units in one of two periods,
1.0 second and 0.5 second, with a 50% duty.
• Outputs: Character and blanking data, with two output
systems for each
• External control input: 8-bit serial input format
• General-purpose output port: 4 bits (controlled from the
serial input data)
Pin Assignment
SANYO: MFP24S
Top view
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-0005 JAPAN
31596HA (OT) No. 4248-1/11
1 page  
LC74770M
Display Control Command Table
First byte
Second byte
Command
Command identification code
Data
Data
7654321076543210
COMMAND 0
Write address
1 0 0 0 V3 V2 V1 V0 0 0 0 H4 H3 H2 H1 H0
COMMAND 1
Character write
1 0 0 1 0 0 0 0 at c6 c5 c4 c3 c2 c1 c0
COMMAND 2
Vertical display position
start position
1 0 1 0 0 0 0 0 0 0 VP VP VP VP VP VP
543210
COMMAND 3
Horizontal display position
start position
1 0 1 1 0 0 0 0 0 0 HP HP HP HP HP HP
543210
COMMAND 4
Display control
1 1 0 0 TST RCL OSC RST 0 MD1 MD0 EG BK BK RV DSP
10
COMMAND 5
BLK2 and CHA2 output control:
lines 1 to 6, and line size control
1 1 0 1 0 0 0 LS 0 0 LN LN LN LN LN LN
654321
COMMAND 6
BLK2 and CHA2 output control:
1 1 1 0 P3 P2 P1 P0 0 0 LN LN LN LN LN LN
lines 7 to 12, and general-purpose
12 11 10 9 8 7
port control
Once written, the command identification code in the first byte is stored until the next first byte is written. However,
when the display character data write command (COMMAND1) is written, the LC74770M locks into the display
character data write mode, and another first byte cannot be written.
When a high level is input to the CS pin, the LC74770M is set to COMMAND0 (display memory write address setup
mode).
1 COMMAND 0 (Display memory write address setup command)
First byte
DA0 to DA7
7
6
5
4
3
2
1
0
Register name
—
—
—
—
V3
V2
V1
V0
State
1
0
0
0
0
1
0
1
0
1
0
1
Register content
Function
Command 0 identification code
Sets the display memory write address.
Display memory address (0 to B hexadecimal)
Note
No. 4248-5/11
5 Page 
LC74770M
Display Screen Structure
The display consists of 12 lines of 24 characters each and thus up to 288 characters can be displayed.
Display memory addresses are specified as row (0 to B hexadecimal) and column (0 to 17 hexadecimal) addresses.
Display Screen Structure (display memory addresses)
s No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace
equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of
which may directly or indirectly cause injury, death or property loss.
s Anyone purchasing any products described or contained herein for an above-mentioned use shall:
Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and
distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all
damages, cost and expenses associated with such use:
Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on
SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees
jointly or severally.
s Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for
volume production. 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 March, 1996. Specifications and information herein are subject to
change without notice.
PS No. 4248-11/11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet LC74770.PDF ] | |
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