ATMEGA8L-8AUR Atmel, ATMEGA8L-8AUR Datasheet - Page 167
![no-image](/images/manufacturer_photos/0/0/78/atmel_sml.jpg)
ATMEGA8L-8AUR
Manufacturer Part Number
ATMEGA8L-8AUR
Description
MCU AVR 8KB FLASH 8MHZ 32TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA8L-8MU.pdf
(302 pages)
Specifications of ATMEGA8L-8AUR
Core Processor
AVR
Core Size
8-Bit
Speed
8MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
23
Program Memory Size
8KB (4K 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
*
Package
32TQFP
Device Core
AVR
Family Name
ATmega
Maximum Speed
8 MHz
Operating Supply Voltage
3.3|5 V
Data Bus Width
8 Bit
Number Of Programmable I/os
23
Interface Type
SPI/TWI/USART
On-chip Adc
8-chx10-bit
Number Of Timers
3
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATMEGA8L-8AUR
Manufacturer:
Atmel
Quantity:
3 915
- Current page: 167 of 302
- Download datasheet (6Mb)
TWI Data Register –
TWDR
TWI (Slave) Address
Register – TWAR
2486Z–AVR–02/11
• Bit 2 – Res: Reserved Bit
This bit is reserved and will always read as zero.
• Bits 1..0 – TWPS: TWI Prescaler Bits
These bits can be read and written, and control the bit rate prescaler.
Table 65. TWI Bit Rate Prescaler
To calculate bit rates, see
used in the equation.
In Transmit mode, TWDR contains the next byte to be transmitted. In Receive mode, the TWDR
contains the last byte received. It is writable while the TWI is not in the process of shifting a byte.
This occurs when the TWI Interrupt Flag (TWINT) is set by hardware. Note that the Data Regis-
ter cannot be initialized by the user before the first interrupt occurs. The data in TWDR remains
stable as long as TWINT is set. While data is shifted out, data on the bus is simultaneously
shifted in. TWDR always contains the last byte present on the bus, except after a wake up from
a sleep mode by the TWI interrupt. In this case, the contents of TWDR is undefined. In the case
of a lost bus arbitration, no data is lost in the transition from Master to Slave. Handling of the
ACK bit is controlled automatically by the TWI logic, the CPU cannot access the ACK bit directly.
• Bits 7..0 – TWD: TWI Data Register
These eight bits constitute 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,
and not needed in the Master modes. In multimaster 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 (0x00). 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.
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
TWPS1
0
0
1
1
TWD7
TWA6
R/W
R/W
7
1
7
1
TWD6
TWA5
R/W
R/W
TWPS0
0
1
0
1
6
1
6
1
“Bit Rate Generator Unit” on page
TWD5
TWA4
R/W
R/W
5
1
5
1
TWD4
TWA3
R/W
R/W
4
1
4
1
Prescaler Value
1
4
16
64
TWD3
TWA2
R/W
R/W
3
1
3
1
TWD2
TWA1
R/W
R/W
2
1
2
1
TWD1
TWA0
164. The value of TWPS1..0 is
R/W
R/W
1
1
1
1
TWGCE
TWD0
R/W
R/W
ATmega8(L)
0
1
0
0
TWDR
TWAR
167
Related parts for ATMEGA8L-8AUR
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![ATMEGA8L](/images/no-image3.png)
Part Number:
Description:
8-bit AVR with 8K Bytes In-System Programmable Flash
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
![ATMEGA8L-8MU](/photos/12/13/121317/atmega8l-8mu_tmb.jpg)
Part Number:
Description:
IC AVR MCU 8K 8MHZ 3V 32-QFN
Manufacturer:
Atmel
Datasheet:
![ATMEGA8L-8PU](/photos/7/21/72189/453-28-dip_tmb.jpg)
Part Number:
Description:
IC AVR MCU 8K 8MHZ 3V 28DIP
Manufacturer:
Atmel
Datasheet:
![ATMEGA8L-8AC](/photos/6/91/69154/313-32-tqfp_tmb.jpg)
Part Number:
Description:
IC AVR MCU 8K LV 8MHZ COM 32TQFP
Manufacturer:
Atmel
Datasheet:
![ATMEGA8L-8AI](/photos/6/91/69154/313-32-tqfp_tmb.jpg)
Part Number:
Description:
IC AVR MCU 8K LV 8MHZ IND 32TQFP
Manufacturer:
Atmel
Datasheet:
![ATMEGA8L-8PC](/photos/7/21/72189/453-28-dip_tmb.jpg)
Part Number:
Description:
IC AVR MCU 8K LV 8MHZ COM 28-DIP
Manufacturer:
Atmel
Datasheet:
![ATMEGA8L-8PI](/photos/7/21/72189/453-28-dip_tmb.jpg)
Part Number:
Description:
IC AVR MCU 8K LV 8MHZ IND 28-DIP
Manufacturer:
Atmel
Datasheet:
![ATMEGA8L-8MC](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
IC AVR MCU 8K LV 8MHZ COM 32-QFN
Manufacturer:
Atmel
Datasheet:
![ATMEGA8L-8MI](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
IC AVR MCU 8K LV 8MHZ IND 32-QFN
Manufacturer:
Atmel
Datasheet:
![ATMEGA8L-8MUR](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
MCU AVR 8KB FLASH 8MHZ 32QFN
Manufacturer:
Atmel
Datasheet:
![ATMEGA8L-8AJ](/photos/6/91/69154/313-32-tqfp_tmb.jpg)
Part Number:
Description:
IC MCU AVR 8K 5V 8MHZ 32-TQFP
Manufacturer:
Atmel
Datasheet:
![ATMEGA8L-8MJ](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
IC MCU AVR 8K 5V 8MHZ 32-QFN
Manufacturer:
Atmel
Datasheet:
![ATMEGA8L-8PJ](/photos/7/21/72189/453-28-dip_tmb.jpg)
Part Number:
Description:
IC MCU AVR 8K 5V 8MHZ 28-DIP
Manufacturer:
Atmel
Datasheet: