ATMEGA16A-MUR Atmel, ATMEGA16A-MUR Datasheet - Page 203
ATMEGA16A-MUR
Manufacturer Part Number
ATMEGA16A-MUR
Description
MCU AVR 16KB FLASH 16MHZ 44QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA16A-MU.pdf
(352 pages)
Specifications of ATMEGA16A-MUR
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
32
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
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
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20.9.5
8154B–AVR–07/09
TWA R– TWI (Slave) Address Register
• Bits 7:0 – TWD: TWI Data Register
These eight bits contain the next data byte to be transmitted, or the latest data byte received on
the Two-wire Serial Bus.
The TWAR should be loaded with the 7-bit Slave address (in the seven most significant bits of
TWAR) to which the TWI will respond when programmed as a Slave Transmitter or receiver. In
multi-master systems, TWAR must be set in Masters which can be addressed as Slaves by
other Masters.
The LSB of TWAR is used to enable recognition of the general call address ($00). There is an
associated address comparator that looks for the Slave address (or general call address if
enabled) in the received serial address. If a match is found, an interrupt request is generated.
• Bits 7:1 – TWA[6:0]: TWI (Slave) Address Register
These seven bits constitute the Slave address of the TWI unit.
• Bit 0 – TWGCE: TWI General Call Recognition Enable Bit
If set, this bit enables the recognition of a General Call given over the Two-wire Serial Bus.
Bit
Read/Write
Initial Value
TWA6
R/W
7
1
TWA5
R/W
6
1
TWA4
R/W
5
1
TWA3
R/W
4
1
TWA2
R/W
3
1
TWA1
R/W
2
1
TWA0
R/W
1
1
ATmega16A
TWGCE
R/W
0
0
TWAR
203
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