ATmega1284P Atmel Corporation, ATmega1284P Datasheet - Page 339

• 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

28.7
T a b l e 2 8 - 1 6
ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P 2-wire Serial Interface meets or exceeds these requirements
under the noted conditions.
Timing symbols refer to
Table 28-16. 2-wire Serial Bus Requirements
8272C–AVR–06/11
Symbol
V
V
V
V
t
t
t
I
C
f
Rp
t
r
of
SP
i
SCL
HD;STA
(1)
IL
IH
hys
OL
i
(1)
(1)
(1)
(1)
(1)
2-wire Serial Interface Characteristics
Parameter
Input Low-voltage
Input High-voltage
Hysteresis of Schmitt Trigger Inputs
Output Low-voltage
Rise Time for both SDA and SCL
Output Fall Time from V
Spikes Suppressed by Input Filter
Input Current each I/O Pin
Capacitance for each I/O Pin
SCL Clock Frequency
Value of Pull-up resistor
Hold Time (repeated) START Condition
d e s c r i b e s t h e r e q u i r e m e n t s fo r d ev i c e s c o n n e c t e d t o t h e 2 - w i r e S e r i a l B u s . T h e
Figure
Figure 28-4. SPI Interface Timing Requirements (Slave Mode)
28-5.
(Data Output)
IHmin
(Data Input)
(CPOL = 0)
(CPOL = 1)
to V
MOSI
MISO
SCK
SCK
SS
ATmega164A/PA/324A/PA/644A/PA/1284/P
ILmax
9
13
f
MSB
CK
MSB
(4)
14
10pF < C
0.1V
> max(16f
3mA sink current
f
f
f
f
SCL
SCL
SCL
SCL
CC
15
Condition
< V
≤ 100kHz
> 100kHz
≤ 100kHz
> 100kHz
b
< 400pF
SCL
i
< 0.9V
, 250kHz)
CC
...
(3)
...
(5)
20 + 0.1C
20 + 0.1C
V
----------------------------
V
----------------------------
0.05 V
CC
CC
0.7 V
3mA
3mA
11
-0.5
Min
-10
4.0
0.6
–
–
0
0
–
0
0,4V
0,4V
CC
CC
b
b
(2)
(2)(3)
(2)(3)
10
LSB
LSB
11
V
12
0.3 V
1000ns
------------------ -
CC
300ns
--------------- -
50
Max
300
250
400
0.4
C
10
10
C
16
–
–
–
+ 0.5
b
(2)
b
CC
X
17
Units
kHz
µA
pF
ns
ns
ns
µs
µs
Ω
Ω
V
V
V
V
339