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PDF LC74730M Data sheet ( Hoja de datos )
| Número de pieza | LC74730M | |
| Descripción | On-Screen Display Controller LSI | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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Ordering number : EN*4247A
CMOS LSI
LC74730M
On-Screen Display Controller LSI
Preliminary
Overview
The LC74730M is a CMOS LSI for on-screen display, a
function that displays characters and patterns on a TV
screen under microprocessor control. (The LC74730M
supports the S-VCR format.) The characters displayed
have an 8 × 8 dots structure and a dot interpolation
function is provided. The LC74730M display 10 lines of
24 characters each.
Features
• Screen format: 10 lines × 24 characters (up to 240
characters)
• Character format: 8 (horizontal) × 8 (vertical) (inter-
polation function provided)
• Character sizes: Three horizontal sizes and 3 vertical
sizes
• Number of characters in font: 64 characters
• Display start position
— Horizontal: 64 positions
— Vertical: 64 positions
• Blinking: In character units
• Types of blinking: Two types with approximately
1.0 sec. and 0.5 sec.
• Background color: Four background colors (in internal
synchronization mode)
(For the PAL-M format: 1 color; blue background)
• External control input: 8-bit serial data input format
• Built-in sync separator circuit
• Built-in synchronization recognition circuit: Recognizes
whether or not external synchronizing signals are
present
• Video output: NTSC and PAL-M format composite
outputs, Y-C output
Package Dimensions
unit: mm
3073A-MFP30S
[LC74730M]
SANYO: MFP30S
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
D3095HA (OT) No. 4247-1/14
1 page  
Serial Data Input Timing
LC74730M
Display Control Commands
The display control commands have an 8-bit serial input format. Commands consist of a first byte, which includes the
command identification code, and data in the second and following bytes. The LC74730M supports the following
commands:
x COMMAND 0: Display memory (VRAM) write address setup command
y COMMAND 1: Display character data write command
z COMMAND 2: Vertical display start position and vertical size setup command
{ COMMAND 3: Horizontal display start position and horizontal size setup command
| COMMAND 4: Display control setup command
} COMMAND 5: Synchronizing signal control setup command
Display Control Command Table
First byte
Command
Command identification code
76543
COMMAND 0
Set write address
1 0 0 0 V3
COMMAND 1
Write character
10010
COMMAND 2
Set vertical display start position and 1 0 1 0 VS
vertical character size
21
COMMAND 3
Set horizontal display start position
1
0
1
1 HS
and horizontal character size
21
COMMAND 4
Display control
1 1 0 0 TST
MOD
COMMAND 5
Synchronizing signal control
1 1 0 1 PH
1
Data
21
V2 V1
0
V0
000
VS VS VS
20 11 10
HS HS HS
20 11 10
CB OSC SYS
STP RST
PH BCL INT
0
7
0
at
0
0
0
0
Second byte
Data
6543210
0 0 H4 H3 H2 H1 H0
0 c5 c4 c3 c2 c1 c0
0 VP VP VP VP VP VP
543210
0 HP HP HP HP HP HP
543210
0 NON EG BK BK RV DSP
10
ON
0 0 0 SN SN SN SN
3210
The command identification code in a first byte is retained until the next first byte is written. However, if a display
character data write command (COMMAND 1) is written, the LC74730M locks in display character data write mode,
and the first byte cannot be overwritten.
The command state is reset to the COMMAND 0 state (display memory address setup mode) when the CS pin is set high.
No. 4247-5/14
5 Page 
LC74730M
Display Screen Organization (Display memory address)
No. 4247-11/14
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet LC74730M.PDF ] | |
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