Freescale Semiconductor DSP56374 User Manual page 42

Enhanced Serial Audio Interface_1
Table 2-9. Enhanced Serial Audio Interface_1 Signals (continued)
Signal Name Signal Type
SCKR_1 Input or Output
PE0 Input, Output, or
Disconnected
SCKT_1 Input or Output
PE3 Input, Output, or
Disconnected
SDO5_1 Output
SDI0_1
PE6 Input, Output, or
Disconnected
2-14
State during
Reset
GPIO
Disconnected
GPIO
Disconnected
GPIO
Disconnected
Input
DSP56374 Users Guide, Rev. 1.2
Signal Description
Receiver Serial Clock_1—SCKR_1 provides the receiver
serial bit clock for the ESAI_1. The SCKR_1 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_1 register. When
configured as the output flag OF0, this pin will reflect the
value of the OF0 bit in the SAICR_1 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_1 register,
synchronized by the frame sync in normal mode or the slot
in network mode.
Port E0—When the ESAI_1 is configured as GPIO, this
signal is individually programmable as input, output, or
internally disconnected.
The default state after reset is GPIO disconnected.
This pin has an internal pull-down resistor.
This input is 5 V tolerant
Transmitter Serial Clock_1—This signal provides the
serial bit rate clock for the ESAI_1. SCKT_1 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 E3—When the ESAI_1 is configured as GPIO, this
signal is individually programmable as input, output, or
internally disconnected.
The default state after reset is GPIO disconnected.
This pin has an internal pull-down resistor.
This input is 5 V tolerant
Serial Data Output 5_1—When programmed as a
transmitter, SDO5_1 is used to transmit data from the TX5
serial transmit shift register.
Serial Data Input 0_1—When programmed as a receiver,
SDI0_1 is used to receive serial data into the RX0 serial
receive shift register.
Port E6—When the ESAI_1 is configured as GPIO, this
signal is individually programmable as input, output, or
internally disconnected.
The default state after reset is GPIO disconnected.
This pin has an internal pull-down resistor.
This input is 5 V tolerant
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