ATmega48P Atmel Corporation, ATmega48P Datasheet - Page 287
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ATmega48P
Manufacturer Part Number
ATmega48P
Description
Manufacturer
Atmel Corporation
Specifications of ATmega48P
Flash (kbytes)
4 Kbytes
Pin Count
32
Max. Operating Frequency
20 MHz
Cpu
8-bit AVR
# Of Touch Channels
12
Hardware Qtouch Acquisition
No
Max I/o Pins
23
Ext Interrupts
24
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
Yes
Crypto Engine
No
Sram (kbytes)
0.5
Eeprom (bytes)
256
Self Program Memory
NO
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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Company
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Manufacturer
Quantity
Price
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Manufacturer:
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Part Number:
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Manufacturer:
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Quantity:
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27.8.14
In
Table 27-7.
Table 27-8.
For details about these two section, see
Write Section” on page 276
Table 27-9.
Note:
8025M–AVR–6/11
BOOTSZ1
Section
Read-While-Write section (RWW)
No Read-While-Write section (NRWW)
Variable
PCMSB
PAGEMSB
ZPCMSB
ZPAGEMSB
PCPAGE
PCWORD
Table 27-7
1
1
0
0
1. Z15:Z13: always ignored
ATmega88P Boot Loader Parameters
Z0: should be zero for all SPM commands, byte select for the LPM instruction.
See
Programming.
BOOTSZ0
through
Boot Size Configuration, ATmega88P
Read-While-Write Limit, ATmega88P
Explanation of Different Variables used in
”Addressing the Flash During Self-Programming” on page 280
1
0
1
0
Table
Boot
Size
128 words
256 words
512 words
1024 words
PC[11:5]
PC[4:0]
Note:
11
4
27-9, the parameters used in the description of the self programming are given.
The different BOOTSZ Fuse configurations are shown in
Pages
16
32
4
8
”NRWW – No Read-While-Write Section” on page 276
Corresponding
Z-value
Application
Flash
Section
0x000 - 0xF7F
0x000 - 0xEFF
0x000 - 0xDFF
0x000 - 0xBFF
Z12:Z6
Z5:Z1
Z12
Z5
(1)
Figure 27-3
Boot
Loader
Flash
Section
0xF80 - 0xFFF
0xF00 - 0xFFF
0xE00 - 0xFFF
0xC00 - 0xFFF
Description
Most significant bit in the Program Counter. (The Program Counter is
12 bits PC[11:0])
Most significant bit which is used to address the words within one
page (32 words in a page requires 5 bits PC [4:0]).
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 PAGEMSB. 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)
Pages
96
32
and the Mapping to the Z-pointer, ATmega88P
for details about the use of Z-pointer during Self-
End
Application
Section
0xF7F
0xEFF
0xDFF
0xBFF
Address
0x000 - 0xBFF
0xC00 - 0xFFF
ATmega48P/88P/168P
Figure 27-2 on page
0xF80
0xF00
0xE00
0xC00
Boot Reset Address (Start Boot Loader
Section)
and
”RWW – Read-While-
278.
287