DSP56366P datasheet(19/110 Pages) FREESCALE

19 / 110 page

DSP56366 Technical Data, Rev. 3.1

Freescale Semiconductor

2-15

FST

Input or output

GPIO

disconnected

Frame Sync for Transmitter—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).

PC4

Input, output, or

disconnected

Port C 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 is 5 V tolerant.

SCKR

Input or output

GPIO

disconnected

Receiver Serial Clock—SCKR provides the receiver serial bit clock for the

ESAI. The SCKR operates as a clock input or output used by all the enabled

receivers in the asynchronous mode (SYN=0), or as serial flag 0 pin in the

synchronous mode (SYN=1).

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

RCKD bit in the RCCR register. When configured as the output flag OF0, this

pin will reflect the value of the OF0 bit in the SAICR register, and the data in

the OF0 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 IF0, the

data value at the pin will be stored in the IF0 bit in the SAISR register,

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

PC0

Input, output, or

disconnected

GPIO

disconnected

Port C 0—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 is 5 V tolerant.

SCKT

Input or output

GPIO

disconnected

Transmitter Serial Clock—This signal provides the serial bit rate clock for the

ESAI. SCKT is a clock input or output used by all enabled transmitters and

receivers in synchronous mode, or by all enabled transmitters in

asynchronous mode.

PC3

Input, output, or

disconnected

GPIO

disconnected

Port C 3—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 is 5 V tolerant.

SDO5

Output

GPIO

disconnected

Serial Data Output 5—When programmed as a transmitter, SDO5 is used to

transmit data from the TX5 serial transmit shift register.

SDI0

Input

GPIO

disconnected

Serial Data Input 0—When programmed as a receiver, SDI0 is used to

receive serial data into the RX0 serial receive shift register.

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

Signal

Name

Signal Type

State during

Reset

Signal Description

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