Signal/Connection Descriptions
Table 9. Enhanced Serial Audio Interface_1 Signals
State during
Signal Name
Signal Type
Signal Description
Reset
SCKR_1
Input or output
GPIO
Receiver Serial Clock_1—SCKR_1 provides the receiver
disconnected 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.
PE0
Input, output, or
disconnected
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.
Internal Pull down resistor.
This input is 5 V tolerant.
SCKT_1
PE3
Input or output
GPIO
Transmitter Serial Clock_1—This signal provides the serial bit
disconnected 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.
Input, output, or
disconnected
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.
Internal Pull down resistor.
This input is 5 V tolerant.
SDO5_1
SDI0_1
PE6
Output
Input
GPIO
Serial Data Output 5_1—When programmed as a transmitter,
disconnected 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.
Input, output, or
disconnected
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.
Internal Pull down resistor.
This input is 5 V tolerant.
24
DSP56371 Technical Data
Freescale Semiconductor
FREESCALE [ Freescale ]
