ATmega48PA Atmel Corporation, ATmega48PA Datasheet - Page 293
ATmega48PA
Manufacturer Part Number
ATmega48PA
Description
Manufacturer
Atmel Corporation
Specifications of ATmega48PA
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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27.8.15
In
Table 27-10. Boot Size Configuration, ATmega168A/168PA
Table 27-11. Read-While-Write Limit, ATmega168A/168PA
For details about these two section, see
Write Section” on page 281
Table 27-12. Explanation of Different Variables used in
Note:
8271D–AVR–05/11
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
ATmega168A and ATmega168PA Boot Loader Parameters
Z0: should be zero for all SPM commands, byte select for the LPM instruction.
See
Programming.
BOOTSZ0
ATmega168A/168PA
through
”Addressing the Flash During Self-Programming” on page 285
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 281
Corresponding
Application
Flash
Section
0x0000 - 0x1F7F
0x0000 - 0x1EFF
0x0000 - 0x1DFF
0x0000 - 0x1BFF
Z-value
Z13:Z7
Z6:Z1
ATmega48A/PA/88A/PA/168A/PA/328/P
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,
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-
283.
293
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