Datasheet

ADSP-BF561
Universal Asynchronous Receiver Transmitter (UART)
Port—Receive and Transmit Timing
Figure 25 describes UART port receive and transmit operations.
The maximum baud rate is SCLK/16. As shown in Figure 25,
there is some latency between the generation internal UART
interrupts and the external data operations. These latencies are
negligible at the data transmission rates for the UART.
RECEIVE
DPI_P14–1
[RxD]
DATA (5–8)
DATA (5–8)
UART RECEIVE BIT SET BY DATA STOP;
CLEARED BY FIFO READ
UART TRANSMIT BIT SET BY PROGRAM;
CLEARED BY WRITE TO TRANSMIT
START
STOP
STOP (1–2)
t
RXD
t
TXD
INTERNAL
UART RECEIVE
INTERRUPT
DPI_P14–1
[TxD]
TRANSMIT
INTERNAL
UART TRANSMIT
INTERRUPT
Figure 25. UART Port—Receive and Transmit Timing
Rev. E | Page 37 of 64 | September 2009