Analog Devices SHARC ADSP-214 Series Hardware Reference Manual page 735

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Write Effect Latency

For details on write effect latency, see the SHARC Processor Programming

UART Effect Latency

After the UART registers are configured the effect latency is 2

Note that when transmitting data the effective data on DPI pins can't be

seen immediately after 2

takes to start driving data depends on the baud rate settings.

Programming Model

The following sections provide some programming procedures for core

and DMA data transfers.

Autobaud Detection

When the baud rate of the incoming signal is not known, one of the gen-

eral-purpose timers can be used in width capture mode to automatically

calculate the baud rate. Do not enable the UART until the width is cap-

tured by the timer. To perform autobaud detection, use the following

1. The UART RX input signal is fed to a DPI pin buffer. This buffer

is used as an input (

2. Configure the timer in width capture mode with the timer inter-

rupt enabled. Inside the ISR, the program should read the width of

the incoming signal and disable the timer.

ADSP-214xx SHARC Processor Hardware Reference

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cycles because the time which the UART

DPI_PBENxx_I

) is routed to both inputs

UART Port Controller

is low). The pin buffer output

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