ATmega1284P Atmel Corporation, ATmega1284P Datasheet - Page 339
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ATmega1284P
Manufacturer Part Number
ATmega1284P
Description
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
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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
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