ATMEGA649-16MI Atmel, ATMEGA649-16MI Datasheet - Page 158
ATMEGA649-16MI
Manufacturer Part Number
ATMEGA649-16MI
Description
IC AVR MCU FLASH 64K 5V 64QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA649-16MI
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
64-MLF®, 64-QFN
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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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:
•
•
•
•
•
•
•
•
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
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