ATmega48P Atmel Corporation, ATmega48P Datasheet - Page 288

• Manufacturer Part Number: ATmega48P
• 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

27.8.15
In
Table 27-10. Boot Size Configuration, ATmega168P
Table 27-11. Read-While-Write Limit, ATmega168P
For details about these two section, see
Write Section” on page 276
Table 27-12. Explanation of Different Variables used in
Note:
288
BOOTSZ1
Section
Read-While-Write section (RWW)
No Read-While-Write section (NRWW)
Variable
PCMSB
PAGEMSB
ZPCMSB
ZPAGEMSB
PCPAGE
PCWORD
Table 27-10
1
1
0
0
1. Z15:Z14: always ignored
ATmega48P/88P/168P
ATmega168P Boot Loader Parameters
Z0: should be zero for all SPM commands, byte select for the LPM instruction.
See
Programming.
BOOTSZ0
through
”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[12:6]
Note:
PC[5:0]
12
5
27-12, the parameters used in the description of the self programming are given.
The different BOOTSZ Fuse configurations are shown in
Pages
16
2
4
8
”NRWW – No Read-While-Write Section” on page 276
Corresponding
Application
Flash
Section
0x0000 - 0x1F7F
0x0000 - 0x1EFF
0x0000 - 0x1DFF
0x0000 - 0x1BFF
Z-value
Z13:Z7
Z6:Z1
Z13
Z6
(1)
Figure 27-3
Boot
Loader
Flash
Section
0x1F80 - 0x1FFF
0x1F00 - 0x1FFF
0x1E00 - 0x1FFF
0x1C00 - 0x1FFF
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 (64 words in a page requires 6 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 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
112
16
and the Mapping to the Z-pointer, ATmega168P
for details about the use of Z-pointer during Self-
End
Application
Section
0x1F7F
0x1EFF
0x1DFF
0x1BFF
Address
0x0000 - 0x1BFF
0x1C00 - 0x1FFF
Figure 27-2 on page
Boot Reset Address (Start Boot
Loader Section)
0x1F80
0x1F00
0x1E00
0x1C00
and
”RWW – Read-While-
278.
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