ATmega6490 Atmel Corporation, ATmega6490 Datasheet - Page 236
ATmega6490
Manufacturer Part Number
ATmega6490
Description
Manufacturer
Atmel Corporation
Specifications of ATmega6490
Flash (kbytes)
64 Kbytes
Pin Count
100
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
69
Ext Interrupts
32
Usb Speed
No
Usb Interface
No
Spi
2
Twi (i2c)
1
Uart
1
Segment Lcd
160
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)
4
Eeprom (bytes)
2048
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
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
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ATmega329/3290/649/6490
Note:
Before a re-initialization is done, the LCD controller/driver should be disabled
Assembly Code Example
C Code Example
LCD_Init:
Void LCD_Init(void);
{
LCDCRB = (1<<LCDCS) | (1<<LCDMUX1)| (1<<LCDPM2);
}
; Use 32 kHz crystal oscillator
; 1/3 Bias and 1/3 duty, SEG21:SEG24 is used as port pins
ldi
sts
; Using 16 as prescaler selection and 7 as LCD Clock Divide
; gives a frame rate of 49 Hz
ldi
sts
; Set segment drive time to 125 µs and output voltage to 3.3 V
ldi
sts
; Enable LCD, default waveform and no interrupt enabled
ldi
sts
ret
/* Use 32 kHz crystal oscillator */
/* 1/3 Bias and 1/3 duty, SEG21:SEG24 is used as port pins */
/* Using 16 as prescaler selection and 7 as LCD Clock Divide */
/* gives a frame rate of 49 Hz */
LCDFRR = (1<<LCDCD2) | (1<<LCDCD1);
/* Set segment drive time to 125 µs and output voltage to 3.3 V*/
LCDCCR = (1<<LCDDC1) | (1<<LCDCC3) | (1<<LCDCC2) | (1<<LCDCC1);
/* Enable LCD, default waveform and no interrupt enabled */
LCDCRA = (1<<LCDEN);
1.
See “About Code Examples” on page 9.
r16, (1<<LCDCS) | (1<<LCDMUX1)| (1<<LCDPM2)
LCDCRB, r16
r16, (1<<LCDCD2) | (1<<LCDCD1)
LCDFRR, r16
r16, (1<<LCDDC1) | (1<<LCDCC3) | (1<<LCDCC2) | (1<<LCDCC1)
LCDCCR, r16
r16, (1<<LCDEN)
LCDCRA, r16
(1)
(1)
2552K–AVR–04/11
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