-4-
1.3.3 I/O Interface Specification
(1) LVDS Signal Definition and Function
A video signal (display data signal and control signal) is converted from parallel data to serial
data with the LVDS transmitter and further converted into four sets of differential signals before
input to this product. These signals are transmitted seven times faster than dot clock signals.
The dot clock signal is converted into one set of differential signals by the transmitter before
input to this product. The LVDS signal definition and function are summarized below:
No.
Item
Signal Name
Number
of
signals
I/O
Form
Content of definition
1
Video Signal
Timing Signal
(ODD)
RA0-
RA0+
RA1-
RA1+
RA2-
RA2+
RA3-
RA3+
RA4-
RA4+
1
1
1
1
1
1
1
1
1
1
Input
LVDS
Differential
Differential serial data signal.
Input video and timing signals after
differential serial conversion using a
dedicated transceiver.
The serial data signal is transmitted
seven times faster than the base
signal
．
2
Video Signal
Timing Signal
(EVEN)
RB0-
RB0+
RB1-
RB1+
RB2-
RB2+
RB3-
RB3+
RB4-
RB4+
1
1
1
1
1
1
1
1
1
1
Input
LVDS
Differential
Differential serial data signal.
Input video and timing signals after
differential serial conversion using a
dedicated transceiver.
The serial data signal is transmitted
seven times faster than the base
signal
．
3
Clock (ODD)
RACLKIN-
1
1
Input
LVDS
Differential
4
Clock (EVEN)
RACLKIN-
1
1
Input
LVDS
Differential
Input the clock signal after
differential conversion using a
dedicated transceiver.
The clock signal is transmitted at
the same speed as the base signal.
5
D
isplay signal
Power down
Signal
PDWN 1
Input
LVTTL
Low :LVDS receiver outputs are all
“L”.
High: Output signals are active.
6 SDA
1
I/O
7
Communication
SCL 1
I/O
LVTTL
(I
2
C)
I
2
C bus serial data communication
signal.
Communication with the control
MPU of this product is enabled.
8
CPUGO 1 Input
LVTTL
“High”: Low power consumption
mode of the control MPU of this
product is released.
9
PDPGO 1 Input
LVTTL
“High”: This product is started.
(CPUGO=“High” Effective)
10
MPU
C
o
mmunication / C
ontrol
Control
IRQ 1
Outpu
t
LVTTL
It changes into "Low"
→
"High"
when this product enters the
undermentioned state.
1. Vcc/Va/Vs output decrease
2. Circuit abnormality detection
