Manual

223
ATmega169V/L
2514A–AVR–08/02
LCD Contrast Control
Register – LCDCCR
• Bits 7:4 – Res: Reserved Bits
These bits are reserved bits in the ATmega169 and will always read as zero.
• Bits 3:0 – LCDCC3:0: LCD Contrast Control
The LCDCC3:0 bits determine the maximum voltage VLCD on segment and common
pins. The different selections are shown in Table 99. New values take effect every
beginning of a new frame.
Bit 76543210
––––LCDCC3 LCDCC2 LCDCC1 LCDCC0 LCDCCR
Read/Write R R R R R/W R/W R/W R/W
InitialValue00000000
Table 99. LCD Contrast Control
LCDCC3 LCDCC2 LCDCC1 LCDCC0 Maximum Voltage V
LDC
0000 2.60
0001 2.65
0010 2.70
0011 2.75
0100 2.80
0101 2.85
0110 2.90
0111 2.95
1000 3.00
1001 3.05
1010 3.10
1011 3.15
1100 3.20
1101 3.25
1110 3.30
1111 3.35