Ordering number : ENN*6526
CMOS IC
LC74731W,74732W
On-Screen Display Controller
Preliminary
Overview
The LC74731W and LC74732W are on-screen display
CMOS ICs that display characters and patterns on a TV
screen under the control of a microcontroller. These ICs
display 16
×
16-dot characters and up to 12 lines of text
with 24 characters per line.
• Character color: Eight colors in character units (in
internal synchronization mode): 2 fsc and 4 fsc
(Black, red, green, yellow, blue, magenta, cyan, and
white)
• Character background color: Eight colors (in internal
synchronization mode): 2 fsc and 4 fsc
(Black, red, green, yellow, blue, magenta, cyan, and
transparent)
• Screen background color: Eight colors (in internal
synchronization mode): 2 fsc and 4 fsc
(Black, red, green, yellow, blue, magenta, cyan, and
white)
• External control inputs: Serial interface with an 8-bit
data size.
• Built-in sync separator circuit
• Video outputs: NTSC, PAL, PALM, PALN, NTSC
4.43, and PAL 60 composite video signal outputs
• Supports Y/C input
Features
• Text structure: 12 lines
×
24 characters (Up to 288
characters)
• Character format: 16
×
16 dots
Character display clock frequency: about 9 MHz
• Character sizes: Four sizes each in the horizontal and
vertical directions with the size set in line units.
• Number of characters supported:
LC74731W:256 (internal)
LC74732W:512 (internal)
Up to 8192 using an external ROM (for Japanese)
[Reference] JIS X0298 (1990): 6877 characters
JIS level 1 kanji: 2965 characters
JIS level 2 kanji: 3388 characters
Special characters: 524 characters
• Display start positions: 128 positions each in the
horizontal and vertical directions
• Blinking, reverse video, reversed blinking, and character
outlining: May be specified in individual character units.
• Blinking types: Two types with periods of about 1.0 and
about 0.5 seconds.
• Blanking: The whole font area (16
×16
dots) can be
blanked in line units
(Four types: no blanking, character size blanking,
character plus outlining size blanking, and whole area up
to adjacent character blanking)
• Line spacing control: Zero to seven scan lines, in line
units
Package Dimensions
[LC74731W,74732W]
12.0
10.0
1.25
48
49
0.5
0.18
1.25
33
32
0.15
12.0
10.0
0.5
1.25
64
17
1
16
0.5
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.
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.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
63000RM (OT) No. 6526-1/38
0.1
0.5
SANYO: SQFP64
1.7max
1.25
LC74731W,74732W
Pin Assignment
OE
CE
D0
D1
D2
D3
D4
D5
D6
D7
A0
A1
A2
A3
A4
50
A5
49
64
63
62
61
60
59
58
57
56
55
54
53
52
51
V
SS
1
XTALin
XTALout
CTRL1
OSCin
OSCout
MUTE
CDLR
SYNCjdg/Rout
CHARA/Gout
BLANK/Bout
IEOUT/BLKout
OUTMOD
CS
SIN
SCLK
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
(V)
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
V
DD
1
RST
SEPin
SEPout
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
CVout
SYNin
(H)
No. 6526-2/38
HFTin
V
DD
2
V
SS
2
Cbias
Cout
CVcr
-NC-
-NC-
Yout
CVin
-NC-
-NC-
Cin
Yin
LC74731W,74732W
Pin Functions
Pin No.
1
2
3
4
5
6
Pin
V
SS
1
Xtalin
Xtalout
CTRL1
OSCin
OSCout
This is an active-low input with hysteresis characteristics (MORE+).
When low, the
CVout, Yout, and Cout outputs are set to either,
(1) CSYNC,
CSYNC,
PE, or
(2)
PE
PE,
PE.
In the initial state, (1) is selected. This setting is switched by commands.
Connection for the resistor used to adjust the background color phase
Ground
Crystal oscillator connections
Function
Ground connection. (Digital system ground)
Connections for the crystal element and capacitors that form the internal sync signal generating
crystal oscillator. Xtalin can also be used to input an external clock signal. (2fsc or 4fsc)
Description
Switches the crystal oscillator Selects external clock input mode or crystal oscillator mode. Low: crystal oscillator mode, high:
input
external clock input mode.
LC oscillator connections
Connections for the coil and capacitor that form the character output dot clock generation oscillator.
7
MUTE
Muting control input
8
CDLR
Background color phase
adjustment
9
SYNCJDG
/Rout
Outputs the result of the judgment as to whether or not the external sync signal is present.
External sync signal judgment A high level is output when a sync signal is present.
output (Rout output)
The dot clock (LC oscillator) is output when RST is low.
(The IC can be set up to not output this signal during resets by commands.)
Character output
(Gout output)
Blank output (Bout output)
Internal/external output
(BLKout output)
Output switching input
Character signal output
Blank signal output pin
Internal synchronization (high)/external synchronization (low) state output pin
Switches between output from pins 9 to 12 and input to pin 32.
Low: normal operation, high: RGB output supported
Serial data input enable
Serial data input is enabled when low.
more+ (Hysteresis input characteristics)
Serial data input
more+ (Hysteresis input characteristics)
Serial data input clock input
more+ (Hysteresis input characteristics)
Composite video signal level adjustment power supply. (Analog system power supply)
Color (C) signal output
This pin must either be left open or connected to ground.
Color signal input
Chrominance bias output
Color (C) signal input
Chrominance signal bias level output
This pin must be either left open or connected to ground.
Luminance signal output
Luminance signal (Y) output
This pin must be either left open or connected to ground.
Luminance signal input
Ground
Video signal output
Luminance signal (Y) input
Ground
Composite video signal output
This pin must either be left open or connected to ground.
Video signal input
Video signal input
Halftone signal input
Sync separator circuit input
Composite video signal input
SECAM chrominance signal input
Halftone signal input
Video signal input to the internal sync separator circuit
10
11
12
13
CHARA/Gout
BLANK/Bout
IEout/BLKout
OUTMOD
14
CS
Enable input
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
SIN
SCLK
V
DD
2
COUT
NC
CIN
CBIAS
NC
YOUT
NC
YIN
V
SS
2
CVOUT
NC
CVIN
CVCR
HFTin
SYNin
SEPout
SEPin
RST
V
DD
1
Data input
Clock input
Power supply
Color signal output
Composite sync signal output Composite sync signal output from the internal sync separator circuit
Vertical sync signal input
Reset input
Power supply (+5 V)
Vertical sync signal input
MORE+ (Hysteresis input characteristics)
System reset input
A built-in pull-up resistor can be included in this pin’s input circuit. (Hysteresis input characteristics)
Power supply (+5 V: digital system power supply)
Continued on next page.
No. 6526-3/38
LC74731W,74732W
Continued from preceding page.
Pin No.
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
Pin
A17
A16
A15
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
OE
CE
D7
D6
D5
D4
D3
D2
D1
D0
Function
Address output 17
Address output 16
Address output 15
Address output 14
Address output 13
Address output 12
Address output 11
Address output 10
Address output 9
Address output 8
Address output 7
Address output 6
Address output 5
Address output 4
Address output 3
Address output 2
Address output 1
Address output 0
Output enable
Chip enable
Data input 7
Data input 6
Data input 5
Data input 4
Data input 3
Data input 2
Data input 1
Data input 0
ROM address output 17
ROM address output 16
ROM address output 15
ROM address output 14
ROM address output 13
ROM address output 12
ROM address output 11
ROM address output 10
ROM address output 9
ROM address output 8
ROM address output 7
ROM address output 6
ROM address output 5
ROM address output 4
ROM address output 3
ROM address output 2
ROM address output 1
ROM address output 0
ROM output enable output. This is an active-low output.
ROM chip enable output. This is an active-low output.
ROM data input 7. MORE+ (Hysteresis input characteristics)
ROM data input 6. MORE+ (Hysteresis input characteristics)
ROM data input 5. MORE+ (Hysteresis input characteristics)
ROM data input 4. MORE+ (Hysteresis input characteristics)
ROM data input 3. MORE+ (Hysteresis input characteristics)
ROM data input 2. MORE+ (Hysteresis input characteristics)
ROM data input 1. MORE+ (Hysteresis input characteristics)
ROM data input 0. MORE+ (Hysteresis input characteristics)
Description
No. 6526-4/38
LC74731W,74732W
Specifications
Maximum Ratings
at Ta = 25°C
Parameter
Supply voltage
Input voltage
Output voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
V
DD
V
IN
V
OUT
Pdmax
Topr
Tstg
V
DD
1 and V
DD
2
All input pins
SYNCJDG, BLANK, CHARA, SEPOUT, A0 to A17,
CE, and OE
Conditions
Ratings
min
V
SS
– 0.3
V
SS
– 0.3
V
SS
– 0.3
—
–30
–40
max
V
SS
+ 6.5
V
DD
1 + 0.3
V
DD
1 + 0.3
275
+70
+125
Unit
V
V
V
mW
°C
°C
Recommended Operating Conditions
Parameter
Symbol
V
DD
1
V
DD
2
V
DD
1
V
DD
2
V
IH
1
High-level input voltage
V
IH
2
V
IH
3
V
IH
4
V
IL
1
Low-level input voltage
V
IL
2
V
IL
3
Pull-up resistor
Composite video signal input
voltage
Input voltage
R
PU
V
IN
1
V
IN
2
V
IN
3
V
DD
1
V
DD
2
V
DD
1
V
DD
2
CS, SIN, SCLK, SEPIN, and MUTE
RST
CTRL1 and OUTMOD
D0 to D7
RST, CS, SIN, SCLK, SEPIN, and MUTE
CTRL1 and OUTMOD
D0 to D7
RST, CS, SIN, SCLK, and MUTE (when the pull-up
resistor option is specified)
CVIN and CVCR
SYNIN
XtalIN (when an external clock input is used)
fin = 2 fsc, 4 fsc
V
DD
1 = 5 V
V
DD
1 = 5 V
V
DD
1 = 5 V
Conditions
Ratings
min
4.5
4.5
2.7
2.7
0.8 V
DD
1
0.8 V
DD
1
0.7 V
DD
1
0.8 V
DD
1
V
SS
– 0.3
V
SS
– 0.3
V
SS
– 0.3
25
—
1.5
—
typ
5.0
5.0
5.0
5.0
—
—
—
—
—
—
—
50
2.0
2.0
—
7.159
14.318
—
—
—
8.867
17.734
10
—
—
—
max
5.5
6.5
5.5
6.5
5.5
V
DD
1 + 0.3
V
DD
1 + 0.3
5.5
0.2 V
DD
1
0.3 V
DD
1
0.2 V
DD
1
90
—
2.5
5.0
Unit
V
V
V
V
V
V
V
V
V
V
V
kΩ
Vp-p
Vp-p
Vp-p
MHz
MHz
MHz
MHz
MHz
Supply voltage
Supply voltage
[Only for RGB output]
The XtalIN and XtalOUT oscillator pins (2 fsc: NTSC)
F
OSC1
The XtalIN and XtalOUT oscillator pins (4 fsc: NTSC)
The XtalIN and XtalOUT oscillator pins (2 fsc: PAL)
The XtalIN and XtalOUT oscillator pins (4 fsc: PAL)
F
OSC2
The OSCin and OSCout oscillator pins (LC oscillator)
Oscillator frequency
Note: If the Xtalin pin is used in clock input mode, applications must take adequate input noise prevention and reduction measures.
No. 6526-5/38
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