Freescale Semiconductor DSP56366 - Manual (Page 54)

Enhanced Serial Audio Interface_1
DSP56366 24-Bit Digital Signal Processor User Manual, Rev. 4
2-20 Freescale Semiconductor
SCKR_1 Input or output 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.
PE0 Input, output, or
disconnected
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 5 V.
SCKT_1 Input or output 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.
PE3 Input, output, or
disconnected
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 5 V.
SDO5_1 Output 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.
SDI0_1 Input Serial Data Input 0_1 — When programmed as a receiver, SDI0 is used
to receive serial data into the RX0 serial receive shift register.
PE6 Input, output, or
disconnected
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 5 V.
Table 2-12 Enhanced Serial Audio Interface_1 Signals (continued)
Signal
Name
Signal Type
State during
Reset
Signal Description