ADSP-BF522 AD [Analog Devices], ADSP-BF522 Datasheet - Page 54

• Manufacturer Part Number: ADSP-BF522
• Description: Blackfin Embedded Processor
• Manufacturer: AD [Analog Devices]

ADSP-BF522/523/524/525/526/527
Universal Serial Bus (USB) On-The-Go—Receive and Transmit Timing
Table 43
operations.
Table 43. USB On-The-Go—Receive and Transmit Timing
Universal Asynchronous Receiver-Transmitter
(UART) Ports—Receive and Transmit Timing
Figure 28
tions. The maximum baud rate is SCLK/16. There is some
latency between the generation of internal UART interrupts
Parameter
Timing Requirements
f
FS
USBS
USB
describes the USB On-The-Go receive and transmit
describes the UART ports receive and transmit opera-
USB_XI Frequency
USB_XI Clock Frequency Stability
RECEIVE
TRANSMIT
UART TRANSMIT
UART RECEIVE
UARTx Tx
(SAMPLE
CLKOUT
UARTx Rx
INTERRUPT
CLOCK)
INTERRUPT
INTERNAL
INTERNAL
START
Figure 28. UART Ports—Receive and Transmit Timing
Rev. PrG | Page 54 of 80 | February 2009
DATA(5-8)
DATA(5-8)
and the external data operations. These latencies are negligible
at the data transmission rates for the UART.
Min
–50
ADSP-BF522/524/526
V
9
DDEXT
1.8 V
STOP
UART TRANSMIT BIT SET BY PROGRAM;
STOP (1-2)
Max
33.3
CLEARED BY WRITE TO TRANSMIT
50
=
UART RECEIVE BIT SET BY
Min
–50
2.5/3.3 V
9
CLEARED BY FIFO READ
V
DDEXT
Preliminary Technical Data
DATA STOP ;
Max
33.3
50
=
V
Min
–50
DDEXT
ADSP-BF523/525/527
9
= 1.8 V
Max
33.3
50
Min
–50
2.5/3.3 V
9
V
DDEXT
Max Unit
33.3 MHz
50
=
ppm