ATmega1284P Atmel Corporation, ATmega1284P Datasheet - Page 338
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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28.6
8272C–AVR–06/11
SPI Timing Characteristics
See
Table 28-15. SPI Timing Parameters
Note:
Figure 28-3. SPI Interface Timing Requirements (Master Mode)
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
Figure 28-3 on page 338
(Data Output)
(Data Input)
(CPOL = 0)
(CPOL = 1)
1. In SPI Programming mode the minimum SCK high/low period is:
- 2 t
- 3 t
MISO
MOSI
SS high to tri-state
SCK
SCK
SCK to out high
SCK to SS high
SCK high/low
SS low to SCK
SS
ATmega164A/PA/324A/PA/644A/PA/1284/P
Rise/Fall time
Rise/Fall time
SCK high/low
SS low to out
Description
CLCL
CLCL
SCK period
SCK period
Out to SCK
SCK to out
SCK to out
Setup
Setup
Hold
Hold
for f
for f
CK
CK
< 12MHz
> 12MHz
6
4
(1)
MSB
5
MSB
and
Figure 28-4 on page 339
Master
Master
Master
Master
Master
Master
Master
Master
Mode
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
7
...
4 • t
2 • t
...
Min
10
t
20
20
ck
ck
ck
for details.
See
50% duty cycle
2
0.5 • t
Table 18-5
Typ
3.6
10
10
15
10
10
15
10
LSB
1
sck
LSB
2
3
Max
1600
8
ns
338
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