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PDF NJU6535 Data sheet ( Hoja de datos )
| Número de pieza | NJU6535 | |
| Descripción | LCD Driver | |
| Fabricantes | New Japan Radio | |
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NJU6535
Preliminary
1/3 , 1/4 Duty LCD Driver
GENERAL DESCRIPTION
www.datasheet4u.com
The NJU6535 is a 1/3 or 1/4 duty LCD driver for
segment type LCD panel with key scan function
transmitting the 30 keys maximum scanned data (6 x 5 =
30) to CPU.
The NJU6535 chooses numbers of common, key scan,
and general purpose ports by instructions. Therefore, It
drives 126 segments at 1/3 duty in use of 3 commons and
42 segments or 164 segments at 1/4 duty in use of 4 and
41. Also it provides 4 general purpose output ports
maximum to drive LEDs or others directly.
Furthermore, the NJU6535 can select a LCD driving
voltage out of 8 steps voltage by the instruction to adjust
the display contrast of LCD panel.
FEATURES
42-segment Drivers
Programmable Duty Ratio
1/3 Duty : 126-segment (Maximum)
1/4 Duty : 164-segment (Maximum)
30-key Scan Function (6X5 matrix)
Needless for anti-reverse current diodes in key scan
Programmable Bias Ratio 1/2, 1/3 bias
Output Port for LED (maximum 4 LED)
Serial Interface (SI, SO, SCL, CS)
Useful Instruction set
Incorporated LCD Driving Voltage Generator Circuits
Electrical Variable Resistance (8-step)
Logic Operating Voltage
4.5 ~ 5.5V
LCD Driving Voltage
~5.5V
Package Outline
QFP64-G1
QFP64-H1
C-MOS Technology (Substrate :P)
PACKAGE OUTLINE
NJU6535FG1
NJU6535FH1
02/08/06
-1-
1 page  
NJU6535
INSTRUCTIONS
The instruction code is consisted of 12-bits data and inputs with display data. (see “Table 1 Instruction Code).
Table 1. Instruction Code
www.datasheet4u.com DY E0 E1 E2 S0 S1 K0 K1 P0 P1 SC DR
Instruction
Duty Select
EVR Register Set
Power Save mode set
Symbol
DY
E0-E2
S0-S1
Segment output /
Key scan output selection
K0, K1
Segment output /
P0, P1
General output port selection
Display ON / OFF
Bias selection
SC
DR
Description
Set the 1/3duty or 1/4duty.
0: 1/3 Duty
1: 1/4 Duty
Set the contraction for
000 – 111 (8-voltage conditions)
00: Normal
01: Power save 1
10: Power save 2
11: Power save 3
00: 30 keys
01: 25 keys
1x: 20 keys
“x” is Don’t care
00: 4 segment outputs
01: 2 General output ports
10: 3 General output ports
11: 4 General output ports
0: Display ON
1: Display OFF
0: 1/3 bias
1: 1/2 bias (connect V1 to V2 terminal)
-5-
5 Page 
NJU6535
(4-2) 1/4Duty
Data 1 (D1 to D44 and Instruction)
CE
www.datasheet4u.com
SCL
SI D1 D2
D42 D43 D44 DY E0 E1 E2 S0 S1 K0 K1 P0 P1 SC DR 0 0
Display data
Instruction
Discernment data
SO
Data 2 (D45 to D84)
CE
SCL
SI
SO
D45 D46
Display data
D84 * * * * * * * * * * * * * * * * 0 1
Dummy data (Don’t Care) 16
Discernment data
Data 3 (D85 to D124)
CE
SCL
SI
SO
D85 D86
Display data
D124 * * *
**** ***** **** 10
Dummy data (Don’t Care) 16
Discernment data
Data 4 (D125 to D164)
CE
SCL
SI
D125 D126
D164 * * * * * * * * * * * * * * * * 1 1
Display data
Dummy data (Don’t Care) 16
Discernment data
SO
NOTE1) All of display data should be transmitted within 30 mS to keep the display quality, because huge
display data D1 to D164 are transmitted at 4 times totally.
NOTE2) Data fetched at SCL rising edge.
NOTE3) Data executed at CE falling edge.
NOTE4) In case of entering less then 58-bit data, invalid data.
NOTE5) In case of entering over then 58-bit data, valid data is last 58-bit data.
NOTE5) Power is turn on time, set the 1/4Duty mode.
- 11 -
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet NJU6535.PDF ] | |
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