ATMEGA169P-16MCU Atmel, ATMEGA169P-16MCU Datasheet - Page 250

• Manufacturer Part Number: ATMEGA169P-16MCU
• Description: MCU AVR 16K ISP FLSH 16MHZ 64QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA169P-16MCU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 54
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-VQFN Exposed Pad, 64-HVQFN, 64-SQFN, 64-DHVQFN
• For Use With: ATAVRBFLY - KIT EVALUATION AVR BUTTERFLYATSTK502 - MOD EXPANSION AVR STARTER 500
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

23.5.4
8018P–AVR–08/10
LCDCCR – LCD Contrast Control Register
• Bits 7:5 – LCDDC2:0: LDC Display Configuration
The LCDDC2:0 bits determine the amount of time the LCD drivers are turned on for each volt-
age transition on segment and common pins. A short drive time will lead to lower power
consumption, but displays with high internal resistance may need longer drive time to achieve
satisfactory contrast. Note that the drive time will never be longer than one half prescaled LCD
clock period, even if the selected drive time is longer. When using static bias or blanking, drive
time will always be one half prescaled LCD clock period.
Table 23-7.
• Bit 4 – LCDMDT: LCD Maximum Drive Time
Writing this bit to one turns the LCD drivers on 100% on the time, regardless of the drive time
configured by LCDDC2:0.
• Bits 3:0 – LCDCC3:0: LCD Contrast Control
The LCDCC3:0 bits determine the maximum voltage V
different selections are shown in
ning of a new frame.
Bit
(0xE7)
Read/Write
Initial Value
LCDDC2
0
0
0
0
1
1
1
1
LCDDC2
R/W
LCD Display Configuration
7
0
LCDDC1
R/W
6
0
LCDDC1
0
0
1
1
0
0
1
1
LCDDC0
R/W
Table 23-8 on page
5
0
LCDMDT
R/W
4
0
LCDDC0
LCDCC3
0
1
0
1
0
1
0
1
R/W
3
0
251. New values take effect every begin-
LCD
on segment and common pins. The
LCDCC2
R/W
2
0
Nominal drive time
300 µs
70 µs
150 µs
450 µs
575 µs
850 µs
1150 µs
50% of clk
LCDCC1
ATmega169P
R/W
1
0
LCD_PS
LCDCC0
R/W
0
0
LCDCCR
250