ATMEGA128L-8MI Atmel, ATMEGA128L-8MI Datasheet - Page 162
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ATMEGA128L-8MI
Manufacturer Part Number
ATMEGA128L-8MI
Description
IC AVR MCU 128K LV 8MHZ IND64QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA128L-8MI
Core Processor
AVR
Core Size
8-Bit
Speed
8MHz
Connectivity
EBI/EMI, I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
53
Program Memory Size
128KB (64K x 16)
Program Memory Type
FLASH
Eeprom Size
4K 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
For Use With
ATSTK501 - ADAPTER KIT FOR 64PIN AVR MCU
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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Serial
Peripheral
Interface – SPI
162
ATmega128
The Serial Peripheral Interface (SPI) allows high-speed synchronous data transfer between the
Atmel AVR ATmega128 and peripheral devices or between several AVR devices. The
ATmega128 SPI includes the following features:
•
•
•
•
•
•
•
•
Figure 75. SPI Block Diagram
Note:
The interconnection between Master and Slave CPUs with SPI is shown in
tem consists of two Shift Registers, and a Master clock generator. The SPI Master initiates the
communication cycle when pulling low the Slave Select SS pin of the desired Slave. Master and
Slave prepare the data to be sent in their respective Shift Registers, and the Master generates
the required clock pulses on the SCK line to interchange data. Data is always shifted from Mas-
ter to Slave on the Master Out – Slave In, MOSI, line, and from Slave to Master on the Master In
– Slave Out, MISO, line. After each data packet, the Master will synchronize the Slave by pulling
high the Slave Select, SS, line.
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
/2/4/8/16/32/64/128
Refer to
DIVIDER
Figure 1 on page 2
and
Table 30 on page 73
for SPI pin placement.
Figure
2467V–AVR–02/11
76. The sys-
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