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11.2.9
FRAME SYNC FOR RECEIVER (FSR_1)
The FSR_1 pin is a bidirectional pin that provides the receivers frame sync signal for the
ESAI_1 interface. FSR_1 may be programmed as a general-purpose I/O pin (PE1) when the
ESAI_1 FSR_1 function is not being used.
11.2.10 FRAME SYNC FOR TRANSMITTER (FST_1)
The FST_1 pin is a bidirectional pin that provides the transmitters frame sync signal for the
ESAI_1 interface. FST_1 may be programmed as a general-purpose I/O pin (PE4) when the
ESAI_1 FST_1 function is not being used.
11.3
ESAI_1 PROGRAMMING MODEL
The ESAI_1 has the following registers:
•
One multiplex control register
•
Five control registers
•
One status register
•
Six transmit data registers
•
Four receive data registers
•
Two transmit slot mask registers
•
Two receive slot mask registers
•
One special-purpose time slot register
The ESAI_1 also contains the GPIO Port E functionality, described in Section 11.5, "GPIO -
Pins and Registers". The following paragraphs give detailed descriptions of bits in the
ESAI_1 registers that differ in functionality from their descriptions in the ESAI Programming
Model.
MOTOROLA
Enhanced Serial Audio Interface 1 (ESAI_1)
DSP56367
ESAI_1 Programming Model
11-5
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