ATmega169P Automotive Atmel Corporation, ATmega169P Automotive Datasheet - Page 241
ATmega169P Automotive
Manufacturer Part Number
ATmega169P Automotive
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT90CAN128_AUTOMOTIVE.pdf
(225 pages)
2.ATMEGA169P_AUTOMOTIVE.pdf
(373 pages)
3.ATMEGA169P_AUTOMOTIVE.pdf
(14 pages)
Specifications of ATmega169P Automotive
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
2.7 to 5.5
Operating Voltage (vcc)
2.7 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
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22.4.3
7735B–AVR–12/07
Disabling the LCD
In the example below we assume SEG10 and COM1 and SEG4 in COM0 are the only segments
changed from frame to frame. Data are stored in r20 and r21 for simplicity
Note:
In some application it may be necessary to disable the LCD. This is the case if the MCU enters
Power-down mode where no clock source is present.
The LCD should be completely discharged before being disabled. No DC voltage should be left
across any segment. The best way to achieve this is to use the LCD Blanking feature that drives
all segment pins and common pins to GND.
When the LCD is disabled, port function is activated again. Therefore, the user must check that
port pins connected to a LCD terminal are either tri-state or output low (sink).
Assembly Code Example
C Code Example
LCD_update:
Void LCD_update(unsigned char data1, data2);
{
}
; LCD Blanking and Low power waveform are unchanged.
; Update Display memory.
sts
sts
ret
/* LCD Blanking and Low power waveform are unchanged. */
/* Update Display memory. */
LCDDR0 = data1;
LCDDR6 = data2;
1.
See ”About Code Examples” on page 10.
LCDDR0, r20
LCDDR6, r21
(1)
(1)
ATmega169P Automotive
241
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