ATmega1284P Atmel Corporation, ATmega1284P Datasheet - Page 336

• Manufacturer Part Number: ATmega1284P
• Manufacturer: Atmel Corporation

Specifications of ATmega1284P

• Flash (kbytes): 128 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 20 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 32
• Ext Interrupts: 32
• Usb Speed: No
• Usb Interface: No
• Spi: 3
• Twi (i2c): 1
• Uart: 2
• 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): 16
• Eeprom (bytes): 4096
• 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: 6
• Input Capture Channels: 1
• Pwm Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

28.3
Table 28-10. Calibration Accuracy of Internal RC Oscillator
Notes:
28.3.1
28.3.2
Table 28-11. External Clock Drive
8272C–AVR–06/11
Factory
Calibration
User
Calibration
Symbol
1/t
t
t
t
t
t
Δ
CLCL
CHCX
CLCX
CLCH
CHCL
t
CLCL
CLCL
Clock Characteristics
1. Voltage range for ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P.
External Clock Drive Waveforms
External Clock Drive
Parameter
Oscillator Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
Change in period from one
clock cycle to the next
Figure 28-2. External Clock Drive Waveforms
7.3 - 8.1MHz
Frequency
8.0MHz
ATmega164A/PA/324A/PA/644A/PA/1284/P
V
Min.
IL1
250
100
100
V
0
CC
V
IH1
=1.8 - 5.5V
Max.
1.8 - 5.5V
2.0
2.0
4
2
V
3V
CC
(1)
Min.
100
40
40
V
0
CC
=2.7 - 5.5V
Max.
Temperature
-40°C - 85°C
1.6
1.6
10
2
25°C
Min.
50
20
20
V
0
CC
=4.5 - 5.5V
Calibration Accuracy
Max.
0.5
0.5
20
2
±10%
±1%
Units
MHz
ns
ns
ns
μs
μs
%
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