NJU6535 데이터 시트보기 (PDF) - Japan Radio Corporation
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NJU6535 Datasheet PDF : 30 Pages
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NJU6535
(2) INSTRUCTIONS CODE
(2-1) Duty select
Duty select instruction is which sets LCD driving duty ratio 1/3 or 1/4 duty.
No.43 terminal is change Common terminal or segment terminal shown below.
Table 1
DY
0
1
Duty ratio
1/3 Duty
1/4 Duty
No.40
COM1
COM1
No.40 to 43 terminal states
No.41
No.42
COM2
COM3
COM2
COM3
No.43
SEG40
COM4
(2-2) E.V.R. resister set
E.V.R. resister set instruction adjusts the contrast of the LCD, and selects.
One LCD driving voltage VLCD out of 8 voltage-stages by setting E.V.R. register.
Set the binary code “000” when contrast adjustment is unused.
E0 E1 E2
1/2 bias
VLCD
1/3 bias
VLCD (VLCD=V0-VSS)
0
0
0
VDD
VDD
High
0
0
1
0.933VDD
0.955VDD
:
0
1
0
0.875VDD
0.913VDD
:
0
1
1
0.824VDD
0.875VDD
:
1
0
0
0.778VDD
0.840VDD
:
1
0
1
0.737VDD
0.808VDD
:
1
1
0
0.700VDD
0.778VDD
:
1
1
1
0.667VDD
0.750VDD
Low
(2-3) Power save mode set
Power save mode reduces the operating current of application using Display Off and selects a terminal
condition of Key scan signal output. The terminal, which is set to "L", does not output Key scan signal as
shown in following table.
S0 S1
Function
0
0
Normal
0
1 Power save 1
1
0 Power save 2
1
1 Power save 3
*1 No scanning states.
Internal
OSC.
ON
Stop
Stop
Stop
LCD output
ON
Display Off
Display Off
Display Off
Key scanning output terminals
states *1
S0 S1 S2 S3 S4 S5
HHHHHH
L L L L LH
L L L LHH
HHHHHH
(2-4) Segment output / key scan output selection
This instruction assigns a function of output terminal either segment output or Key scan signal output to
5 terminals numbered from 44 to 45 as shown in following table.
K0
K1
Maximum key
No.44 to 49 terminal states
matrix
No.44 No.45 No.46 No.47 No.48 No.49
0
0
30 key
S0
S1
S2
S3
S4
S5
0
1
25 key
SEG41 S1
S2
S3
S4
S5
1
*
20 key
SEG41 SEG42 S2
S3
S4
S5
(*:Don’t care)
-6-
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