3. I/O Terminals
3.1 Pin Description
Pin NO.
Symbol
Function Description
1 PS
Parallel or Serial data input select
2 C86
MPU Interface select(6800 or 8080)
3 V0
LCD driver supply voltage
4 V4
LCD driver supply voltage
5 V3
LCD driver supply voltage
6 V2
LCD driver supply voltage
7 V1
LCD driver supply voltage
8 C2-
For internal DC/DC voltage converter
9 C2+
For internal DC/DC voltage converter
10 C1+
For internal DC/DC voltage converter
11 C1-
For internal DC/DC voltage converter
12 C3+
For internal DC/DC voltage converter
13 VOUT
DC/DC voltage converter output
14 VSS
Logic Ground.
15 VDD
Logic supply voltage.
16-23 DB7-DB0
Quasi-Bidirectional I/O Data Bus.
Three state I/O common terminal.
DB0 (LSB) ... DB7 (MSB)
24 /RD(E)
When connected to an 8080 MPU, it is active LOW. This pad is
connected to the RD signal of the 8080MPU, and the NT7532 data bus
is in an output status when this signal is "L" When connected to a 6800
Series MPU, this is active HIGH. This is used as an enable clock input
of the 6800 series MPU
When connected to an 8080 MPU, this is active LOW. This terminal
connects to the 8080 MPU WR signal. The signals on the data bus are
latched at the rising edge of the WR signal. When connected to a 6800
Series MPU, this is the read/write control signal input terminal.
When W R/ = "H": Read
When W R/ = "L": Write
26 A0
Data or Instruction.
A0 = H
DB<0:7>: Display RAM data
A0 = L
DB<0:7>: Instruction data
27 /RES
14 16 RES I When RES is set to "L", the settings are initialized. The
reset operation is performed by the RES signal level
28 /CS1
This is the chip select signal. When CS1="L", then the chip select
becomes active, and data/command I/O is enabled.
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/WR(R/W
3.2 Block Diagram
4. Electro-optical Specifications
4.1 Absolute Maximum Ratings
No Item
Symbol
Min. Max. Unit
1
Supply Voltage For Logic
V
DD
-V
SS
-0.3
3.6
V
2
Supply Voltage For Lcd Driver
V
LCD
13.5 V
3
V
I
V
DD
+0.3 V
Note: Operating Temperature and Storage Temperature can be found in 1.General Specifications.
4.2 Optical Characteristics
(1)
No Item
Symbol Condition
Min. Typ. Max. Unit
1 Contrast
Ratio
Cr
Ta=23+3
o
C
V
LCD
= Typ.
(2)
- 4.03
-
-
2 Response
time
T
ON
Ta=23+3
o
C 110
ms
3 Response
time
T
OFF
Ta=23+3
o
C
170
ms
4 3H
48 - Deg.
5
9H
50 - Deg.
6H
28
-
Deg.
7
Viewing
Angle
12H
O4
Cr = 2
Ta=23+3
o
C
- 55
-
Deg.
Note:
(1) See Appendix 1 Definition of Optical Characteristics for detail.
(2) V
LCD
can be found in 4.2 Electrical Characteristics Supply Voltage for LCD Driver
-0.3
-0.3
Input Voltage
-
-
O1
_
O2
_
6
O3
_
_
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4.3 Electrical Characteristics
No Iitem
Symbol Condition Min.
Typ. Max.
Unit
1
Supply Voltage for Logic
V
DD
-V
SS
2.4
/
3.5
V
2
Supply Voltage for LCD Driver
V
O
-V
SS
(V
LCD
)
Ta=23+3
o
C
9.5
9.6 9.7 V
3
Supply Current for Logic
I
DD
- 0.4
1.5
mA
4 Oscillation
Frequency
F
osc
Ta=23+3
o
C 27
33
39
KHz
5
Input High Voltage
V
IH
-
0.7
V
DD
DD
V
6
Input Low Voltage
V
IL
-
-0.3 - 0.4 V
7
Output High Voltage
V
OH
-
2.0 -
-
V
8
Output Low Voltage
V
OL
-
-
-
0.4 V
9
Supply Current for LED
Backlight
I
LED
V
LED
= Typ.
Ta=23+3
o
C
50
-
mA
10
Supply Voltage for LED
Backlight
V
LED
I
LED
= Typ.
Ta=23+3
o
C
- V
4.4 Timming Characteristics
42
-
-
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Appendix 1
1. Optical Definitions
Note 1: Contrast Ratio Test
A. Contrast ratio is calculated by the following formula when the output voltage (Fig.2-a, positive
type; Fig 2-b,negative type) is obtained from the next electro-optical test system (Fig.1)
B. Conditions of Testing: Accord to the LCD s driving method and operating voltage (Vop)
C. The formula:
Photometer output voltage when non-select waveform is applying
Contrast ratio = -----------------------------------------------------------------------------------
(positive type )
Photometer output voltage when select waveform is applying
Photometer output voltage when select waveform is applying
Contrast ratio = -----------------------------------------------------------------------------------
(negative type )
Photometer output voltage when non-select waveform is applying
D. Test system:
Note 2: Response time
A. Rise time is defined as the time required for the transmission to change from 90% to 10%.
B. Fall time is defined as the time required for the transmission to change from 10% to 90%.
C. On time is defined as the time required for the transmission to change from 100% to 10%.
D. Off time is defined as the time required for the transmission to change from 10% to 100%.
Fig. 1
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