ATmega1284P Atmel Corporation, ATmega1284P Datasheet - Page 291
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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26.8.14
In
Table 26-7.
Note:
Table 26-8.
Note:
Table 26-9.
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 26-7
”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.
ATmega164A/ATmega164PA Boot Loader Parameters
Write Section” on page
through
BOOTSZ0
Boot Size Configuration
Read-While-Write Limit
Explanation of different variables used in
1
0
1
0
PC[12:6]
PC[5:0]
12
Table
5
Boot Size
1024 words
128 words
256 words
512 words
26-9, the parameters used in the description of the Self-Programming are given.
Corresponding
280.
Z-value
Z14:Z7
Z6:Z1
Z13
Z6
(1)
(1)
Pages
ATmega164A/PA/324A/PA/644A/PA/1284/P
16
2
4
8
”NRWW – No Read-While-Write Section” on page 280
Description
Most significant bit in the Program Counter. (The Program Counter is 13 bits
PC[12:0])
Most significant bit which is used to address the words within one page (128
words in a page requires seven bits PC [5:0]).
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 page address: Page select, for Page Erase and Page Write
Program Counter word address: Word select, for filling temporary buffer (must
be zero during Page Write operation)
Application
Flash Section
0x0000 - 0x1F7F
0x0000 - 0x1EFF
0x0000 - 0x1DFF
0x0000 - 0x1BFF
Figure 26-3 on page 284
(1)
Figure 26-2 on page
Pages
112
16
0x1F00 - 0x1FFF
Boot Loader
Flash Section
0x1F80 - 0x1FFF
0x1E00 - 0x1FFF
0x1C00 - 0x1FFF
for details about the use of Z-pointer during Self-
282.
and the mapping to the Z-pointer
End
Application
Section
0x1F7F
0x1EFF
0x1DFF
0x1BFF
Address
0x0000 - 0x1BFF
0x1C00 - 0x1FFF
and
”RWW – Read-While-
Boot Reset
Address
(Start Boot
Loader Section)
0x1F80
0x1F00
0x1E00
0x1C00
291
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