DSP56371 데이터 시트보기 (PDF) - Freescale Semiconductor

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DSP56371

high density CMOS device with 5.0-volt compatible inputs and outputs.

Freescale Semiconductor 

Signal/Connection Descriptions

3.8 Enhanced Serial Audio Interface

Table 8. Enhanced Serial Audio Interface Signals

Signal

Name

HCKR

PC2

Signal Type

Input or output

Input, output, or

disconnected

State during

Reset

Signal Description

GPIO

disconnected

High Frequency Clock for Receiver—When programmed as an

input, this signal provides a high frequency clock source for the

ESAI receiver as an alternate to the DSP core clock. When

programmed as an output, this signal can serve as a high-

frequency sample clock (e.g., for external digital to analog

converters [DACs]) or as an additional system clock.

Port C2—When the ESAI is configured as GPIO, this signal is

individually programmable as input, output, or internally

disconnected.

The default state after reset is GPIO disconnected.

HCKT

PC5

Input or output

Input, output, or

disconnected

Internal Pull down resistor.

This input is 5 V tolerant.

GPIO

disconnected

High Frequency Clock for Transmitter—When programmed as

an input, this signal provides a high frequency clock source for the

ESAI transmitter as an alternate to the DSP core clock. When

programmed as an output, this signal can serve as a high

frequency sample clock (e.g., for external DACs) or as an

additional system clock.

Port C5—When the ESAI is configured as GPIO, this signal is

individually programmable as input, output, or internally

disconnected.

The default state after reset is GPIO disconnected.

Internal Pull down resistor.

This input is 5 V tolerant.

Freescale Semiconductor

DSP56371 Technical Data

17

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