ATMEGA88-20MUR Atmel, ATMEGA88-20MUR Datasheet - Page 281

• Manufacturer Part Number: ATMEGA88-20MUR
• Description: MCU AVR 8K FLASH 20MHZ 32QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA88-20MUR

• 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: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K 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: *
• Cpu Family: ATmega
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 20MHz
• Interface Type: SPI/TWI/USART
• Total Internal Ram Size: 1KB
• # I/os (max): 23
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 32
• Package Type: MLF EP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

27.8.13
2545T–AVR–05/11
Atmel ATmega88 boot loader parameters
In
ming are given.
Table 27-6.
Note:
Table 27-7.
For details about these two section, see
and
Table 27-8.
Note:
BOOTSZ1
Section
Read-while-write section (RWW)
No read-while-write section (NRWW)
Variable
PCMSB
PAGEMSB
ZPCMSB
ZPAGEMSB
PCPAGE
PCWORD
Table 27-6
“RWW – Read-while-write section” on page 270
1
1
0
0
The different BOOTSZ Fuse configurations are shown in
1. Z15:Z13: Always ignored.
Z0: Should be zero for all SPM commands, byte select for the LPM instruction.
BOOTSZ0
through
Boot size configuration, ATmega88.
Read-while-write limit, ATmega88.
Explanation of different variables used in
ping to the Z-pointer, ATmega88.
PC[11:5]
PC[4:0]
1
0
1
0
11
4
Table
Boot
size
128
words
256
words
512
words
1024
words
Corresponding
27-8, the parameters used in the description of the self program-
Z-value
Z12:Z6
Z5:Z1
Pages
Z12
Z5
16
32
4
8
(1)
“NRWW – No read-while-write section” on page 270
Application
flash
section
0x000 -
0xF7F
0x000 -
0xEFF
0x000 -
0xDFF
0x000 -
0xBFF
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
Figure 27-3 on page 275
Boot
loader
flash
section
0xF80 -
0xFFF
0xF00 -
0xFFF
0xE00 -
0xFFF
0xC00 -
0xFFF
Figure 27-2 on page
ATmega48/88/168
Address
0x000 - 0xBFF
0xC00 - 0xFFF
End
application
section
0xF7F
0xEFF
0xDFF
0xBFF
272.
and the map-
Boot reset
address (start
boot loader
section)
0xF80
0xF00
0xE00
0xC00
281