ATMEGA88-20MUR Atmel, ATMEGA88-20MUR Datasheet - Page 302

• 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

Figure 28-8. Serial programming instruction example.
28.8.4
2545T–AVR–05/11
Byte 1
SPI serial programming characteristics
Load program memory page (high/low byte)/
Load EEPROM memory page (page access)
Bit 15 B
Byte 2
Adr MSB
Adr M M S S B
A
Figure 28-9. Serial programming waveforms.
For characteristics of the SPI module
SERIAL DATA OUTPUT
SERIAL CLOCK INPUT
SERIAL DATA INPUT
Byte 3
Adr LSB
Page offset
SAMPLE
(MOSI)
(MISO)
0
(SCK)
Serial programming instruction
Byte 4
Program memory/
EEPROM memory
MSB
MSB
Page buffer
Page N-1
Page 0
Page 1
Page 2
see “SPI timing characteristics” on page
Byte 1
Page number
Bit 15 B
Write program memory page/
Write EEPROM memory page
Byte 2
Adr MSB
ATmega48/88/168
Byte 3
Adr LSB
A A dr r L L SB B
0
309.
Byte 4
LSB
LSB
302