ATmega1284P Atmel Corporation, ATmega1284P Datasheet - Page 293
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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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26.8.16
In
Table 26-13. Boot Size Configuration
Note:
Table 26-14. Read-While-Write Limit
Note:
Table 26-15. Explanation of different variables used in
Note:
See
Programming.
8272C–AVR–06/11
BOOTSZ1
Section
Read-While-Write section (RWW)
No Read-While-Write section (NRWW)
Variable
PCMSB
PAGEMSB
ZPCMSB
ZPAGEMSB
PCPAGE
PCWORD
Table 26-13
”Addressing the Flash During Self-Programming” on page 284
1
1
0
0
1. The different BOOTSZ Fuse configurations are shown in
1. For details about these two section, see
1. Z0: should be zero for all SPM commands, byte select for the (E)LPM instruction.
ATmega644A/ATmega644PA Boot Loader Parameters
Write Section” on page
BOOTSZ0
through
1
0
1
0
PC[14:7]
PC[6:0]
14
7
Table
Boot Size
1024 words
2048 words
4096 words
512 words
26-15, the parameters used in the description of the Self-Programming are given.
Corresponding
280.
Z-value
Z15:Z7
Z7:Z1
Z15
(1)
Z8
(1)
Pages
ATmega164A/PA/324A/PA/644A/PA/1284/P
16
32
4
8
”NRWW – No Read-While-Write Section” on page 280
Program Counter page address: Page select, for Page Erase and Page Write
Application
Flash Section
0x0000 - 0x7DFF
0x0000 - 0x7BFF
0x0000 - 0x77FF
0x0000 - 0x6FFF
Description
Most significant bit in the Program Counter. (The Program Counter is 14 bits
PC[14:0])
Most significant bit which is used to address the words within one page (128
words in a page requires seven bits PC [6:0]).
Bit in Z-pointer that is mapped to PCMSB. Because Z0 is not used, the
ZPCMSB equals PCMSB + 1.
Bit in Z-pointer that is mapped to PCMSB. Because Z0 is not used, the
ZPAGEMSB equals PAGEMSB + 1.
Program Counter word address: Word select, for filling temporary buffer (must
be zero during Page Write operation)
Figure 26-3 on page 284
(1)
Figure 26-2 on page
Pages
224
32
Boot Loader
Flash Section
0x7E00 - 0x7FFF
0x7C00 - 0x7FFF
0x7800 - 0x7FFF
0x7000 - 0x7FFF
for details about the use of Z-pointer during Self-
282.
and the mapping to the Z-pointer
End
Application
Section
0x7DFF
0x7BFF
0x77FF
0x6FFF
Address
0x0000 - 0x6FFF
0x7000 - 0x7FFF
and
”RWW – Read-While-
Boot Reset
Address
(Start Boot
Loader Section)
0x7E00
0x7C00
0x7800
0x7000
293
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