ATMEGA649-16MUR Atmel, ATMEGA649-16MUR Datasheet - Page 158

• Manufacturer Part Number: ATMEGA649-16MUR
• Description: MCU AVR 64KB FLASH 16MHZ 64QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA649-16MUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 4K 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: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

18. SPI – Serial Peripheral Interface
18.1
18.2
158
Features
Overview
ATmega329/3290/649/6490
The ATmega329/3290/649/6490 SPI includes the following features:
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The Serial Peripheral Interface (SPI) allows high-speed synchronous data transfer between the
ATmega329/3290/649/6490 and peripheral devices or between several AVR devices. A simpli-
fied block diagram of the Serial Peripheral Interface is shown in
The PRSPI bit in
SPI module.
Figure 18-1. SPI Block Diagram
Note:
Full-duplex, Three-wire Synchronous Data Transfer
Master or Slave Operation
LSB First or MSB First Data Transfer
Seven Programmable Bit Rates
End of Transmission Interrupt Flag
Write Collision Flag Protection
Wake-up from Idle Mode
Double Speed (CK/2) Master SPI Mode
1. Refer to
/2/4/8/16/32/64/128
DIVIDER
“Power Reduction Register” on page 37
Figure 1-1 on page
(1)
2, and
Table 13-6 on page 68
must be written to zero to enable the
Figure
for SPI pin placement.
18-1.
2552K–AVR–04/11