ATMEGA169PV-8MCHR Atmel, ATMEGA169PV-8MCHR Datasheet - Page 239
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ATMEGA169PV-8MCHR
Manufacturer Part Number
ATMEGA169PV-8MCHR
Description
MCU AVR 16KB FLASH 16MHZ 64QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA169PV-8AU.pdf
(395 pages)
Specifications of ATMEGA169PV-8MCHR
Core Processor
AVR
Core Size
8-Bit
Speed
8MHz
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)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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23.3.3
23.3.4
8018P–AVR–08/10
1/3 Duty and 1/3 Bias
1/4 Duty and 1/3 Bias
1/3 bias is usually recommended for LCD with three common terminals (1/3 duty). Waveform is
shown in
COM1 is the voltage across a segment that is off.
Figure 23-5. Driving a LCD with Three Common Terminals
1/3 bias is optimal for LCD displays with four common terminals (1/4 duty). Waveform is shown
in
the voltage across a segment that is off.
Figure 23-6. Driving a LCD with Four Common Terminals
Figure
-
-
-
-
2
1
2
1
2
1
1
2
2
1
2
1
2
1
1
2
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
3
3
3
3
3
3
3
3
-V
3
3
3
3
3
3
3
3
-V
V
V
V
V
V
V
V
V
V
V
V
GND
GND
GND
V
V
V
GND
V
V
V
GND
V
V
V
GND
V
V
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
23-6. SEG0 - COM0 is the voltage across a segment that is on and SEG0 - COM1 is
Figure
Frame
Frame
23-5. SEG0 - COM0 is the voltage across a segment that is on and SEG0-
Frame
Frame
SEG0
COM0
SEG0 - COM0
SEG0
COM0
SEG0 - COM0
-
-
-
-
2
1
2
1
2
1
1
2
2
1
2
1
2
1
1
2
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
/
3
3
3
3
3
3
3
3
-V
3
3
3
3
3
3
3
3
-V
V
V
V
V
V
V
V
V
V
V
V
GND
GND
GND
V
V
V
V
V
V
V
V
V
V
V
GND
GND
GND
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
Frame
Frame
ATmega169P
Frame
Frame
SEG0
COM1
SEG0 - COM1
SEG0
COM1
SEG0 - COM1
239
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