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ADSP-BF535
Universal Asynchronous Receiver-Transmitter (UART) Port—Receive and Transmit Timing
Figure 17 describes UART port receive and transmit operations. The maximum baud rate is SCLK/16. As shown in Figure 17, there is some latency between the generation of internal UART interrupts and the external data operations. These latencies are negligible at the data transmission rates for the UART.
SCLK (SAMPLE CLOCK)
RxD |
DATA(5–8) |
STOP
RECEIVE
INTERNAL
UART RECEIVE
INTERRUPT
START
UART RECEIVE BIT SET BY DATA STOP; CLEARED BY FIFO READ
TxD |
DATA(5–8) |
STOP (1–2) |
|
AS DATA |
|
TRANSMIT |
WRITTEN TO |
|
|
BUFFER |
|
INTERNAL |
|
UART TRANSMIT BIT SET BY PROGRAM; |
UART TRANSMIT |
|
|
|
CLEARED BY WRITE TO TRANSMIT |
|
INTERRUPT |
|
|
|
|
Figure 17. UART Port—Receive and Transmit Timing
–34– |
REV. A |