ADSP-BF548_15 Datasheet, PDF (67/102 Pages) Analog Devices – Blackfin Embedded Processor

ADSP-BF542/ADSP-BF544/ADSP-BF547/ADSP-BF548/ADSP-BF549
Universal Asynchronous Receiver-Transmitter
(UART) Ports—Receive and Transmit Timing
The UART ports have a maximum baud rate of SCLK/16. There
is some latency between the generation of internal UART inter-
rupts and the external data operations. These latencies are
negligible at the data transmission rates for the UART. For more
information, see the ADSP-BF54x Blackfin Processor Hardware
Reference.
General-Purpose Port Timing
Table 46 and Figure 40 describe general-purpose
port operations.
Table 46. General-Purpose Port Timing
Parameter
Timing Requirement
t_WFI
General-Purpose Port Pin Input Pulse Width
Switching Characteristic
t_GPOD
General-Purpose Port Pin Output Delay from CLKOUT Low
Min
t_SCLK + 1
–0.3
Max
+6
Unit
ns
ns
CLKOUT
GPIO OUTPUT
GPIO INPUT
t_GPOD
t_WFI
Figure 40. General-Purpose Port Timing
Rev. E | Page 67 of 102 | March 2014