ATA6613P-PLPW Atmel, ATA6613P-PLPW Datasheet - Page 196

MCU W/LIN TXRX REG WTCHDG 48-QFN

ATA6613P-PLPW

Manufacturer Part Number
ATA6613P-PLPW
Description
MCU W/LIN TXRX REG WTCHDG 48-QFN
Manufacturer
Atmel
Series
AVR® ATA66 LIN-SBCr
Datasheet

Specifications of ATA6613P-PLPW

Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
I²C, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
23
Program Memory Size
16KB (16K x 8)
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 ~ 125°C
Package / Case
48-QFN Exposed Pad
Processor Series
ATA6x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
1 KB
Interface Type
SPI, TWI, USART
Maximum Clock Frequency
16 MHz
Number Of Programmable I/os
23
Number Of Timers
3
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
6.17.2.2
196
Atmel ATA6612/ATA6613
Double Speed Operation (U2Xn)
Table 6-71
lating the UBRRn value for each mode of operation using an internally generated clock
source.
Table 6-71.
Note:
Some examples of UBRRn values for some system clock frequencies are found in
on page 218
on page
The transfer rate can be doubled by setting the U2Xn bit in UCSRnA. Setting this bit only has
effect for the asynchronous operation. Set this bit to zero when using synchronous opera-
tion.Setting this bit will reduce the divisor of the baud rate divider from 16 to 8, effectively
doubling the transfer rate for asynchronous communication.
Note however that the Receiver will in this case only use half the number of samples (reduced
from 16 to 8) for data sampling and clock recovery, and therefore a more accurate baud rate
setting and system clock are required when this mode is used. For the Transmitter, there are
no downsides.
Operating Mode
Asynchronous Normal
mode (U2Xn = 0)
Asynchronous Double
Speed mode (U2Xn = 1)
Synchronous Master mode
BAUD
f
UBRRn
OSC
1. The baud rate is defined to be the transfer rate in bit per second (bps)
218).
contains equations for calculating the baud rate (in bits per second) and for calcu-
(see
Equations for Calculating Baud Rate Register Setting
“Examples of UBRRn Settings for Commonly Used Oscillator Frequencies”
Baud rate (in bits per second, bps)
System Oscillator clock frequency
Contents of the UBRRnH and UBRRnL Registers, (0-4095)
BAUD
BAUD
BAUD
Equation for Calculating Baud
=
=
=
----------------------------------------- -
16 UBRRn
-------------------------------------- -
8 UBRRn
-------------------------------------- -
2 UBRRn
Rate
f
f
f
OSC
OSC
OSC
(1)
+
+
+
1
1
1
UBRRn
UBRRn
UBRRn
Equation for Calculating UBRRn
=
=
=
----------------------- - 1
16BAUD
------------------- - 1
8BAUD
------------------- - 1
2BAUD
f
f
Value
f
OSC
OSC
OSC
9111H–AUTO–01/11
Table 6-79

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