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LC74770のメーカーはSanyo Semicon Deviceです、この部品の機能は「On-Screen Display Controller LSI」です。 |
部品番号 | LC74770 |
| |
部品説明 | On-Screen Display Controller LSI | ||
メーカ | Sanyo Semicon Device | ||
ロゴ | |||
このページの下部にプレビューとLC74770ダウンロード(pdfファイル)リンクがあります。 Total 11 pages
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 Serial Data Input Timing
LC74770M
Pin Functions
No. Symbol
Pin
Function
1 VSS Ground pin
2
OSCIN
LC oscillator pin
3 OSCOUT
Clock output/test
4 CKOUT/TEST output pin
Ground connection
Connections for the coil and capacitor that form the oscillator that generates the character output
dot clock.
Provides the OSCOUT output (when RST is low) and the test mode output.
General-purpose port 0
5 P0 output pin
General-purpose port (PORT0) output
General-purpose port 1
6 P1 output pin
General-purpose port (PORT1) output
Enable input for the serial data input function. Serial data input is enabled when this pin is low.
7 CS Enable input pin A pull-up resistor is built in, i.e., this is a hysteresis input.
8
SCLK
Clock input pin
Clock input for the serial data input function. A pull-up resistor is built in,
i.e., this is a hysteresis input.
9 SIN Data input pin
Serial data input. A pull-up resistor is built in, i.e., this is a hysteresis input.
10 VSS Ground pin
11 NC No connection
Ground connection
12 NC No connection
13 NC No connection
Unused pins.
These pins must be left open or connected to ground.
14 NC No connection
15
CHA1
Character 1 output pin System 1 character data output
16
BLK1
Blank 1 output pin
System 1 blank data output
17
CHA2
Character 2 output pin System 2 character data output
18
BLK2
Blank 2 output pin
System 2 blank data output
General-purpose port 3
19 P3 output pin
General-purpose port (PORT3) output
General-purpose port 2
20 P2 output pin
General-purpose port (PORT2) output
Vertical synchronizing
21
VSYNC
signal input pin
Input for the vertical synchronizing signal (active low)
Horizontal synchronizing
22
HSYNC
signal input pin
Input for the horizontal synchronizing signal (active low)
23
RST
Reset input pin
System reset input (active low) A pull-up resistor is built in, i.e., this is a hysteresis input.
24 VDD Power supply pin (+5 V) Power supply (+5 V)
No. 4248-3/11
3Pages LC74770M
Second byte
DA0 to DA7 Register name
State
Register content
Function
7 — 0 Second byte identification bit
6 —0
5 —0
0
4 H4
1
0
3 H3
1
0
2 H2
Display memory address (0 to 17 hexadecimal)
1
0
1 H1
1
0
0 H0
1
Note: All registers are set to 0 when the LC74770M is reset by the RST pin.
2 COMMAND 1 (Display character data write setup command)
First byte
DA0 to DA7
7
6
5
4
3
2
1
0
Register name
—
—
—
—
—
—
—
—
State
1
0
0
1
0
0
0
0
Register content
Function
Command 1 identification code
Sets up display character data write.
Second byte
DA0 to DA7 Register name
State
Register content
Function
0 Character attribute off
7 at
1 Character attribute on
0
6 c6
1
0
5 c5
1
0
4 c4
1
0
3 c3
Character code (00 to 7F hexadecimal)
1
0
2 c2
1
0
1 c1
1
0
0 c0
1
Note: All registers are set to 0 when the LC74770M is reset by the RST pin.
Note
Note
When this command is input, the
LC74770M locks into the display
character data write mode until the CS
pin goes high.
Note
No. 4248-6/11
6 Page | |||
ページ | 合計 : 11 ページ | ||
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部品番号 | 部品説明 | メーカ |
LC74770 | On-Screen Display Controller LSI | Sanyo Semicon Device |
LC74770M | On-Screen Display Controller LSI | Sanyo Semicon Device |
LC74772V | Camcorder On-Screen Display LSI | Sanyo Semicon Device |
LC74772V | On-Screen Display LSI | ON Semiconductor |