Rainbow-electronics Atmega169L Manual do Utilizador descarregar pdf (Página 223)

100

101

223

ATmega169V/L

2514A–AVR–08/02

LCD Contrast Control

• 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

1 2 ... 218 219 220 221 222 223 224 225 226 227 228 ... 316 317

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