UPD16662 View Datasheet(PDF) - NEC => Renesas Technology
Part Name
Description
Manufacturer
UPD16662 Datasheet PDF : 36 Pages
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µPD16662
Gray scale control
The µPD16662 gray scale control realizes 25 levels of the gray scale pallet through frame thinning and pulse width
modulation. It chooses four gray scales and records them in the gray scale pallet register before use.
Gray scale pallet register
Through the use of the gray scale pallet register, four gray scales are pre-selected from 25 levels. The gray scale
pallet register is allocated in addresses 1FFF0H to 1FFFFH, and the relationship between the register and the gray
scale data is shown in the following table. The initial values are also allocated as below. The gray scale pallet
register can set each column/driver configuration position (No.0 to 3) decided by PL0 and PL1.
Address
1FFF0H
1FFF1H
1FFF2H
1FFF3H
1FFF4H
1FFF5H
1FFF6H
1FFF7H
1FFF8H
1FFF9H
1FFFAH
1FFFBH
1FFFCH
1FFFDH
1FFFEH
1FFFFH
Note n = 0, 2, 4, 6
Configuration position
No.
No.0
No.1
No.2
No.3
Gray scale data (Display data)
Dn+1 Note
Dn Note
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
Initial value
00000B
01000B
10000B
11000B
00000B
01000B
10000B
11000B
00000B
01000B
10000B
11000B
00000B
01000B
10000B
11000B
9
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