DSP56367 datasheet(21/100 Pages) FREESCALE

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Enhanced Serial Audio Interface_1

DSP56367 Technical Data, Rev. 2.1

Freescale Semiconductor

2-17

SCKR_1

PE0

Input or Output

Input, Output, or

Disconnected

GPIO

Disconnected

Receiver Serial Clock_1—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.

Port E 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 cannot tolerate 3.3V.

SCKT_1

PE3

Input or Output

Input, Output, or

Disconnected

GPIO

Disconnected

Transmitter Serial Clock_1—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.

Port E 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 cannot tolerate 3.3V.

SDO5_1

SDI0_1

PE6

Output

Input

Input, Output, or

Disconnected

GPIO

Disconnected

Serial Data Output 5_1—When programmed as a transmitter, SDO5 is used

to transmit data from the TX5 serial transmit shift register.

Serial Data Input 0_1—When programmed as a receiver, SDI0 is used to

receive serial data into the RX0 serial receive shift register.

Port E 6—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.

SDO4_1

SDI1_1

PE7

Output

Input

Input, Output, or

Disconnected

GPIO

Disconnected

Serial Data Output 4_1—When programmed as a transmitter, SDO4 is used

to transmit data from the TX4 serial transmit shift register.

Serial Data Input 1_1—When programmed as a receiver, SDI1 is used to

receive serial data into the RX1 serial receive shift register.

Port E 7—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 3.3V tolerant.

Table 2-12 Enhanced Serial Audio Interface_1 Signals (continued)

Signal

Name

Signal Type

State during

Reset

Signal Description

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