ATmega169PA Atmel Corporation, ATmega169PA Datasheet - Page 240
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ATmega169PA
Manufacturer Part Number
ATmega169PA
Description
Manufacturer
Atmel Corporation
Specifications of ATmega169PA
Flash (kbytes)
16 Kbytes
Pin Count
64
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
54
Ext Interrupts
17
Usb Speed
No
Usb Interface
No
Spi
2
Twi (i2c)
1
Uart
1
Segment Lcd
100
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
1
Eeprom (bytes)
512
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
Yes
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8 to 5.5
Operating Voltage (vcc)
1.8 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
3
Output Compare Channels
4
Input Capture Channels
1
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATmega169PA-MU
Manufacturer:
ATMEL
Quantity:
31
Company:
Part Number:
ATmega169PAAU
Manufacturer:
INF
Quantity:
4 275
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24.2.9
24.3
24.3.1
24.3.2
8284D–AVR–6/11
Mode of Operation
Minimizing power consumption
Static Duty and Bias
1/2 Duty and 1/2 Bias
ATmega169A/PA/329A/PA/3290A/PA/649A/P/6490A/P
mum drive time of approximately 2ms when using 1/2 or 1/4 duty, and approximately 2.7ms
when using 1/3 duty. To achieve satisfactory contrast, all segments on the LCD display must
therefore be able to be fully charged/discharged within 2 or 2.7ms, depending on the number of
common pins.
By keeping the percentage of the time the LCD drivers are turned on at a minimum, the power
consumption of the LCD driver can be minimized. This can be achieved by using the lowest
acceptable frame rate, and using low power waveform if possible. The drive time should be kept
at the lowest setting that achieves satisfactory contrast for a particular display, while allowing
some headroom for production variations between individual LCD drivers and displays. Note
that some of the highest LCD voltage settings may result in high power consumption when V
is below 2.0V. The recommended maximum LCD voltage is 2*(V
If all segments on a LCD have one electrode common, then each segment must have a unique
terminal.
This kind of display is driven with the waveform shown in
age across a segment that is on, and SEG1 - COM0 is the voltage across a segment that is off.
Figure 24-3. Driving a LCD with One Common Terminal
For LCD with two common terminals (1/2 duty) a more complex waveform must be used to indi-
vidually control segments. Although 1/3 bias can be selected 1/2 bias is most common for these
displays. Waveform is shown in
segment that is on, and SEG0 - COM1 is the voltage across a segment that is off.
V
GND
V
GND
V
GND
-V
LCD
LCD
LCD
LCD
Frame
Frame
SEG0
COM0
SEG0 - COM0
Figure 24-4 on page
V
GND
V
GND
GND
241. SEG0 - COM0 is the voltage across a
LCD
LCD
Figure
Frame
CC
24-3. SEG0 - COM0 is the volt-
Frame
- 0.2V).
SEG1
COM0
SEG1 - COM0
240
CC
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