ATmega169P Automotive Atmel Corporation, ATmega169P Automotive Datasheet - Page 247

• Manufacturer Part Number: ATmega169P Automotive
• Manufacturer: Atmel Corporation

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

22.5.4
7735B–AVR–12/07
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 22-7.
• Bit 4 – LCDMDT: LCD Maxium 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
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
5
0
22-8. New values take effect every beginning of a new
LCDMDT
R/W
4
0
ATmega169P Automotive
LCDDC0
LCDCC3
0
1
0
1
0
1
0
1
R/W
3
0
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
R/W
1
0
LCD_PS
LCDCC0
R/W
0
0
LCDCCR
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