LC74730M データシートの表示（PDF） - SANYO -> Panasonic
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LC74730M Datasheet PDF : 14 Pages
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LC74730M
Timing Characteristics at Ta = –30 to +70°C, VDD1 = 5 ± 0.5 V
Parameter
Minimum input pulse width
Data setup time
Data hold time
One word write time
Symbol
tW (SCLK)
tW (CS)
tSU (CS)
tSU (SIN)
th (CS)
th (SIN)
tword
twt
Conditions
SCLK
CS pin (during the period that CS is high)
CS
SIN
CS
SIN
The 8-bit data write time
The RAM data write time
min
typ
max
Unit
200
ns
1
µs
200
ns
200
ns
2
µs
200
ns
4.2
µs
1
µs
Pin Functions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Symbol
VSS1
XtalIN
XtalOUT
CTRL1
CSYNOUT
OSCIN
OSCOUT
SYNCJDG
CS
SCLK
SIN
VDD2
COUT
NC
CIN
CBIAS
YOUT
NC
YIN
CTRL2
CVOUT
NC
CVIN
CTRL3
SYNIN
SEPC
SEPOUT
SEPIN
RST
VDD1
Function
Ground
Ground connection
Description
Crystal oscillator element
connection
Crystal oscillator input
switching
Composite synchronizing
signal output
Used to connect the external crystal and capacitors for the crystal oscillator that generates
the internal synchronizing signal. Also used for an external clock input. (2fsc: 7.159 MHz)
Switches between the external 2fsc clock input mode and the crystal resonator driving mode.
Low: crystal oscillator, high: external clock input
Outputs the composite synchronizing signal. Outputs the crystal oscillator clock on a reset due
to a low level on the RST pin. Does not output any signal on a command reset.
LC oscillator
Connections for the coil and capacitor that form the oscillator that generates the character
output dot clock.
Outputs the judgment as to whether or not an external synchronizing signal is present. Outputs
External synchronizing signal a high level when a synchronizing signal is present. Outputs the dot clock (LC oscillator) on a
state judgment output
reset due to a low level on the RST pin. Does not output any signal on a command reset.
Enable input
Enable input for serial data input. Serial data input is enabled by a low level. A pull-up resistor is
built in. (This input has hysteresis characteristics.)
Clock input
Serial data input clock input. A pull-up resistor is built in. (This input has hysteresis characteristics.)
Data input
Serial data input. A pull-up resistor is built in. (This input has hysteresis characteristics.)
Power supply
Video signal level adjustment power supply. (Analog system power supply)
Color signal output
Color (C) signal output
This pin must be level open or connected to ground.
Color signal input
Color (C) signal input
Chrominance bias output
Chrominance signal bias level output
Luminance signal output
Luminance signal (Y) output
This pin must be level open or connected to ground.
Luminance signal input
Luminance signal (Y) input
Switches the synchronizing signal generator between NTSC and PAL-M formats. Low: NTSC,
NTSC/PAL-M switching input high: PAL-M
Composite video signal output Outputs a composite video signal.
This pin must be level open or connected to ground.
Composite video signal input Inputs a composite video signal.
SEPIN input control
Controls whether the VSYNC signal is input to the SEPIN input. Low: VSYNC is input,
high: VSYNC is not input.
Sync separator circuit input
Video signal input to the built-in sync separator circuit. (Input either a horizontal or composite
synchronizing signal to this pin if the built-in sync separator circuit is not used.)
Sync separator circuit
adjustment
Adjusts the built-in sync separator circuit. (Connect a capacitor to this pin.)
(Leave this pin open if the built-in sync separator circuit is not used.)
Composite synchronizing
signal output
Vertical synchronizing
signal input
Reset input
Outputs the built-in sync separator circuit composite synchronizing signal.
(Outputs the SYNIN input signal if the built-in sync separator circuit is not used.)
Integrates the SEPOUT output signal and inputs a vertical synchronizing signal.
An integration circuit must be connected between this pin and the SEPOUT pin. This pin must
be tied to VDD1 if it is not used.
The system reset input. A pull-up resistor is built in. (This input has hysteresis characteristics.)
Power supply (+5 V)
Power supply (+5 V: digital system power supply)
No. 4247-3/14
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