ATMEGA48-20AJ Atmel, ATMEGA48-20AJ Datasheet - Page 281

• Manufacturer Part Number: ATMEGA48-20AJ
• Description: IC AVR MCU 4K 5V 20MHZ 32-TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA48-20AJ

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 23
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFP, 32-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ATMEGA48-24AJ; ATMEGA48-24AJ

26.8.14
2545S–AVR–07/10
ATmega168 Boot Loader Parameters
In
ming are given.
Table 26-9.
Note:
Table 26-10. Read-While-Write Limit, ATmega168
For details about these two section, see
and
BOOTSZ1
Section
Read-While-Write section (RWW)
No Read-While-Write section (NRWW)
Table 26-9
“RWW – Read-While-Write Section” on page 269
1
1
0
0
The different BOOTSZ Fuse configurations are shown in
See
Z-pointer during Self-Programming.
BOOTSZ0
through
Boot Size Configuration, ATmega168
“Addressing the Flash During Self-Programming” on page 273
1
0
1
0
Table
Boot
Size
128
words
256
words
512
words
1024
words
26-11, the parameters used in the description of the self program-
Pages
16
2
4
8
“NRWW – No Read-While-Write Section” on page 269
Application
Flash
Section
0x0000 -
0x1F7F
0x0000 -
0x1EFF
0x0000 -
0x1DFF
0x0000 -
0x1BFF
Pages
112
Boot
Loader
Flash
Section
0x1F80 -
0x1FFF
0x1F00 -
0x1FFF
0x1E00 -
0x1FFF
0x1C00 -
0x1FFF
16
Figure
ATmega48/88/168
26-2.
End
Application
Section
0x1F7F
0x1EFF
0x1DFF
0x1BFF
for details about the use of
Address
0x0000 - 0x1BFF
0x1C00 - 0x1FFF
Boot Reset
Address
(Start Boot
Loader
Section)
0x1F80
0x1F00
0x1E00
0x1C00
281