AT90PWM216-16SE ATMEL [ATMEL Corporation], AT90PWM216-16SE Datasheet - Page 215

• Manufacturer Part Number: AT90PWM216-16SE
• Description: 8-bit Microcontroller with 16K Bytes In-System Programmable flash
• Manufacturer: ATMEL [ATMEL Corporation]

19.3.3.1
19.3.3.2
7710D–AVR–08/09
Manchester frame
Manchester decoder
Encoder Clock
Manchester Data
Binary Data
Figure 19-2. Manchester Bi-phase levels
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).
• 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
• One or Two stop bits (level encoded)
mode.
Start
Bit
1 0 0 1 1 1 1 0 1 0 0 1 0 1 0 1 0
Logical 0
(up to 17 data bit)
Data Bits
Logical 1
AT90PWM216/316
Stop
Bits
215