ATmega325P Atmel Corporation, ATmega325P Datasheet - Page 268

• Manufacturer Part Number: ATmega325P
• Manufacturer: Atmel Corporation

Specifications of ATmega325P

• Flash (kbytes): 32 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 20 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 54
• Ext Interrupts: 17
• Usb Speed: No
• Usb Interface: No
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• 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): 2
• Eeprom (bytes): 1024
• 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: 4
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

24.8.13
In
Table 24-6.
Note:
Table 24-7.
Note:
Table 24-8.
Note:
8023F–AVR–07/09
Section
Read-While-Write section (RWW)
No Read-While-Write section (NRWW)
Variable
PCMSB
PAGEMSB
ZPCMSB
ZPAGEMSB
PCPAGE
PCWORD
BOOTSZ1
Table 24-6
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 LPM instruction. See
ATmega325P/3250P Boot Loader Parameters
Write Section” on page
gramming” on page 261
through
BOOTSZ0
Boot Size Configuration
Read-While-Write Limit
Explanation of different variables used in
1
0
1
0
Table
PC[13:6]
PC[5:0]
13
5
24-8, the parameters used in the description of the Self-Programming are given.
1024/ words
2048 words
Boot Size
256 words
512 words
257.
for details about the use of Z-pointer during Self-Programming.
(1)
Corresponding
(1)
Z-value
Z14:Z7
Z6:Z1
Z14
Z6
Pages
”NRWW – No Read-While-Write Section” on page 257
16
32
4
8
Application
Flash Section
0x0000-0x3EFF
0x0000-0x3DFF
0x0000-0x3BFF
0x0000-0x37FF
Most significant bit in the Program Counter. (Program Counter is 14 bits
PC[13:0])
Most significant bit which is used to address the words within one page
(64 words in a page requires six/seven bits PC [5:0]).
Bit in Z-register that is mapped to PCMSB. Because Z0 is not used, the
ZPCMSB equals PCMSB + 1.
Bit in Z-register 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)
Figure 24-3
Pages
224
Figure 24-2
32
and the mapping to the Z-pointer
Boot Loader
Flash Section
0x3F00-0x3FFF
0x3E00-0x3FFF
0x3C00-0x3FFF
0x3800-0x3FFF
Address
0x0000 - 0x37FF
0x3800 - 0x3FFF
Description
ATmega325P/3250P
”Addressing the Flash During Self-Pro-
End
Application
Section
0x3EFF
0x3DFF
0x3BFF
0x37FF
and
”RWW – Read-While-
(1)
Boot Reset
Address
(Start
Boot Loader
Section)
0x3F00
0x3E00
0x3C00
0x3800
268