ATMEGA169V-1MC Atmel, ATMEGA169V-1MC Datasheet - Page 213

• Manufacturer Part Number: ATMEGA169V-1MC
• Description: IC MCU AVR 16K 1.8V 1MHZ 64-QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA169V-1MC

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 1MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 53
• 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): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 64-MLF®, 64-QFN
• For Use With: ATAVRISP2 - PROGRAMMER AVR IN SYSTEMATAVRBFLY - KIT EVALUATION AVR BUTTERFLYATSTK502 - MOD EXPANSION AVR STARTER 500
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

1/2 Duty and 1/2 Bias
2514H–AVR–05/03
Figure 98. Driving a LCD with One Common Terminal
For LCD with two common terminals (1/2 duty) a more complex waveform must be used
to individually control segments. Although 1/3 bias can be selected 1/2 bias is most
common for these displays. Waveform is shown in Figure 99. SEG0 - COM0 is the volt-
age across a segment that is on, and SEG0 - COM1 is the voltage across a segment
that is off.
Figure 99. Driving a LCD with Two Common Terminals
-1
1
1
V
GND
V
GND
V
GND
-V
/
/
/
2
2
2
-V
LCD
LCD
LCD
V
V
V
V
V
V
GND
GND
GND
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
Frame
Frame
Frame
Frame
SEG0
COM0
SEG0 - COM0
SEG0
COM0
SEG0 - COM0
-1
1
1
V
GND
V
GND
GND
/
/
/
2
2
2
-V
LCD
LCD
V
V
V
V
V
V
GND
GND
GND
LCD
LCD
LCD
LCD
LCD
LCD
LCD
Frame
Frame
ATmega169V/L
Frame
Frame
SEG1
COM0
SEG1 - COM0
SEG0
COM1
SEG0 - COM1
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