AT90PWM3B-16SUR Atmel, AT90PWM3B-16SUR Datasheet - Page 213
![MCU AVR 8K FLASH 16MHA 32SOIC](/photos/7/29/72992/313-32-soic_sml.jpg)
AT90PWM3B-16SUR
Manufacturer Part Number
AT90PWM3B-16SUR
Description
MCU AVR 8K FLASH 16MHA 32SOIC
Manufacturer
Atmel
Series
AVR® 90PWM Lightingr
Datasheet
1.AT90PWM3B-16SU.pdf
(361 pages)
Specifications of AT90PWM3B-16SUR
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
27
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 11x10b; D/A 1x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
32-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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19.3.3.1
19.3.3.2
4317J–AVR–08/10
Manchester frame
Manchester decoder
Encoder Clock
Manchester Data
Binary Data
The USART supports Manchester encoded frames with the following characteristics:
•
•
•
•
Figure 19-3. Manchester Frame example
When configured in Manchester mode, the EUSART receiver is able to receive serial frame
using a 17-bit shift register, an edge detector and several data/control registers. The Manchester
decoder receives a frame from the RxD pin of the EUSART interface and loads the received
data in the EUSART data register (UDR and EUDR).
The bit order of the data bits in the frame is configurable to handle MSB or LSB first.
The polarity of the bi-phase start is not configurable. The start bit a logical ‘1’ (rising edge at bit
center).
The polarity of the stop bits is not configurable, the interface allows to read the 2 stops bits value
by software.
The Manchester decoder is enable when the EUSART is configured in Manchester mode and
the RXEN of USCRB set (global USART receive enable).
The number of data bits to be received can be configured with the URxS bits of EUCSRA
register.
The Manchester decoder provides a special mode where 16 or 17 data bits can be received. In
this mode the Manchester decoder can automatically detects if the seventeenth bit is Man-
chester encoded or not (seventeenth data bit or first stop bit). If the receiver detects a valid data
bit (Manchester transition) during the seventeenth bit time of the frame, the receiver will process
the frame as a 17-bit frame lenght and set the F1617 bit of EUCSRC register.
In Manchester mode, the clock used for sampling the EUSART input signal is programmed by
the baudrate generator.
The edge detector of the Manchester decoder is based upon a 16 bits up/down counter which
maximum value can be configured through the MUBRRH and MUBRRL registers.
One start bit Manchester encoded (logical ‘1’)
5, 6, 7, 8, 9, 13, 14,15,16,17 data bits in transmission or reception (MSB or LSB first)
The number of data bit in a frame is independently configurable in reception and
transmission mode.
One or Two stop bits (level encoded)
Start
Bit
1 0 0 1 1 1 1 0 1 0 0 1 0 1 0 1 0
(up to 17 data bit)
Data Bits
AT90PWM2/3/2B/3B
Stop
Bits
213
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