DSP56367 datasheet(20/100 Pages) FREESCALE

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Enhanced Serial Audio Interface_1

DSP56367 Technical Data, Rev. 2.1

2-16

Freescale Semiconductor

2.13

Enhanced Serial Audio Interface_1

SDO0/

SDO0_1

PC11/

PE11

Output

Input, Output, or

Disconnected

GPIO

Disconnected

Serial Data Output 0—SDO0 is used to transmit data from the TX0 serial

transmit shift register.

When enabled for ESAI_1 operation, this is the ESAI_1 Serial Data Output 0.

Port C 11—When the ESAI is configured as GPIO, this signal is individually

programmable as input, output, or internally disconnected.

When enabled for ESAI_1 GPIO, this is the Port E 11 signal.

The default state after reset is GPIO disconnected.

This input is 3.3V tolerant.

Table 2-12 Enhanced Serial Audio Interface_1 Signals

Signal

Name

Signal Type

State during

Reset

Signal Description

FSR_1

PE1

Input or Output

Input, Output, or

Disconnected

GPIO

Disconnected

Frame Sync for Receiver_1—This is the receiver frame sync input/output

signal. In the asynchronous mode (SYN=0), the FSR pin operates as the

frame sync input or output used by all the enabled receivers. In the

synchronous mode (SYN=1), it operates as either the serial flag 1 pin

(TEBE=0), or as the transmitter external buffer enable control (TEBE=1,

RFSD=1).

When this pin is configured as serial flag pin, its direction is determined by the

RFSD bit in the RCCR register. When configured as the output flag OF1, this

pin will reflect the value of the OF1 bit in the SAICR register, and the data in

the OF1 bit will show up at the pin synchronized to the frame sync in normal

mode or the slot in network mode. When configured as the input flag IF1, the

data value at the pin will be stored in the IF1 bit in the SAISR register,

synchronized by the frame sync in normal mode or the slot in network mode.

Port E 1—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.

This input cannot tolerate 3.3V.

FST_1

PE4

Input or Output

Input, Output, or

Disconnected

GPIO

Disconnected

Frame Sync for Transmitter_1—This is the transmitter frame sync

input/output signal. For synchronous mode, this signal is the frame sync for

both transmitters and receivers. For asynchronous mode, FST is the frame

sync for the transmitters only. The direction is determined by the transmitter

frame sync direction (TFSD) bit in the ESAI transmit clock control register

(TCCR).

Port E 4—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.

This input cannot tolerate 3.3V.

Table 2-11 Enhanced Serial Audio Interface Signals (continued)

Signal

Name

Signal Type

State during

Reset

Signal Description

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