AT90PWM3 datasheet(223/361 Pages) ATMEL

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223

4317J–AVR–08/10

AT90PWM2/3/2B/3B

19.6.4

EUSART Control Register B – EUCSRB

• Bit 7:5 –Reserved Bits

These bits are reserved for future use. For compatibilty with future devices, these bits must be

written to zero when EUSCRB is written.

• Bit 4 – EUSART Enable Bit

Set to enable the EUSART mode, clear to operate as standard USART.

• Bit 3– EUSBS Enable Bit

This bit selects the number of stop bits detected by the receiver.

Note:

The number of stop bit inserted by the Transmitter in EUSART mode is configurable throught the

USBS bit of in the of the USART.

• Bit 2–Reserved Bit

This bit is reserved for future use. For compatibilty with future devices, this bit must be written to

zero when EUSCRB is written.

• Bit 1 – Manchester mode

1001

14-bit

1010

15-bit

1011

16-bit

1100

Reserved

1101

Reserved

1110

16 OR 17 bit (for Manchester

encoded only mode)

1111

17-bit

Table 19-2.

URxS Bits Settings

URxS3

URxS2

URxS1

URxS0

Receive Character Size

Bit

76543210

EUSART

EUSBS

EMCH

BODR

EUCSRB

Read/Write

R/W

Initial Value

00000000

Table 19-3.

EUSBS Bit Settings

EUSBS

Receiver Stop Bit(s)

01-bit

12-bit

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