AT91 datasheet(108/153 Pages) ATMEL

108 / 153 page

108

AT91X40 Series

1354D–ATARM–08/02

USART Control Register

Name:US_CR

Access Type:Write Only

Offset:

0x00

• RSTRX: Reset Receiver (Code Label US_RSTRX)

0 = No effect.

1 = The receiver logic is reset.

• RSTTX: Reset Transmitter (Code Label US_RSTTX)

0 = No effect.

1 = The transmitter logic is reset.

• RXEN: Receiver Enable (Code Label US_RXEN)

0 = No effect.

1 = The receiver is enabled if RXDIS is 0.

• RXDIS: Receiver Disable (Code Label US_RXDIS)

0 = No effect.

1 = The receiver is disabled.

• TXEN: Transmitter Enable (Code Label US_TXEN)

0 = No effect.

1 = The transmitter is enabled if TXDIS is 0.

• TXDIS: Transmitter Disable (Code Label US_TXDIS)

0 = No effect.

1 = The transmitter is disabled.

• RSTSTA: Reset Status Bits (Code Label US_RSTSTA)

0 = No effect.

1 = Resets the status bits PARE, FRAME, OVRE and RXBRK in the US_CSR.

• STTBRK: Start Break (Code Label US_STTBRK)

0 = No effect.

1 = If break is not being transmitted, start transmission of a break after the characters present in US_THR and the Transmit

Shift Register have been transmitted.

• STPBRK: Stop Break (Code Label US_STPBRK)

0 = No effect.

1 = If a break is being transmitted, stop transmission of the break after a minimum of one character length and transmit a

high level during 12 bit periods.

––

–––

––

–

––

–––

––

–

––

–

SENDA

STTTO

STPBRK

STTBRK

RSTSTA

TXDIS

TXEN

RXDIS

RXEN

RSTTX

RSTRX

––

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