ADSP-BF526BBCZ-4AX View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

ADSP-BF526BBCZ-4AX

Blackfin® Embedded Processor

Analog Devices 

ADSP-BF522/523/524/525/526/527

Preliminary Technical Data

Universal Serial Bus (USB) On-The-Go—Receive and Transmit Timing

Table 43 describes the USB On-The-Go receive and transmit

operations.

Table 43. USB On-The-Go—Receive and Transmit Timing

Parameter

Timing Requirements

fUSBS

FSUSB

USB_XI Frequency

USB_XI Clock Frequency Stability

ADSP-BF522/524/526 ADSP-BF523/525/527

VDDEXT =

1.8 V

VDDEXT = VDDEXT = 1.8 V VDDEXT =

2.5/3.3 V

2.5/3.3 V

Min Max Min Max Min Max Min Max Unit

9 33.3 9 33.3 9 33.3 9 33.3 MHz

–50 50 –50 50 –50 50 –50 50 ppm

Universal Asynchronous Receiver-Transmitter

(UART) Ports—Receive and Transmit Timing

Figure 28 describes the UART ports receive and transmit opera-

tions. The maximum baud rate is SCLK/16. 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.

CLKOUT

(SAMPLE

CLOCK )

UARTx Rx

RECEIVE

INTERNAL

UART RECEIVE

INTERRUPT

UARTx Tx

TRANSMIT

INTERNAL

UART TRANSMIT

INTERRUPT

DATA(5-8)

STOP

START

DATA(5-8)

UART RECEIVE BIT SET BY

DATA STOP ;

CLEARED BY FIFO READ

STOP (1-2)

UART TRANSMIT BIT SET BY PROGRAM;

CLEARED BY WRITE TO TRANSMIT

Figure 28. UART Ports—Receive and Transmit Timing

Rev. PrG | Page 54 of 80 | February 2009

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