ATMEGA161L-4AI Atmel, ATMEGA161L-4AI Datasheet - Page 68
ATMEGA161L-4AI
Manufacturer Part Number
ATMEGA161L-4AI
Description
IC AVR MCU 16K LV 4MZ IND 44TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA161-8AC.pdf
(159 pages)
Specifications of ATMEGA161L-4AI
Core Processor
AVR
Core Size
8-Bit
Speed
4MHz
Connectivity
SPI, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
35
Program Memory Size
16KB (8K 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
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
44-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Data Converters
-
Other names
ATMEGA161L4AI
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SPI Data Register – SPDR
68
ATmega161(L)
The SPI Data Register is a read/write register used for data transfer between the Regis-
ter File and the SPI Shift Register. Writing to the register initiates data transmission.
Reading the register causes the Shift Register Receive buffer to be read.
Bit
$0F ($2F)
Read/Write
Initial Value
MSB
R/W
7
x
R/W
6
x
R/W
5
x
R/W
4
x
R/W
3
x
R/W
2
x
R/W
1
x
LSB
R/W
0
x
1228D–AVR–02/07
Undefined
SPDR
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