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Enhanced Serial Audio Interface 1 (ESAI_1)
ESAI_1 Data and Control Pins
The pin may be used as SDO3_1/SDI2_1 if it is not defined as ESAI SDO3/SDI2. The pin
may be used as GPIO PE8 if not used by the ESAI or ESAI_1. The ESAI_1 Multiplex Control
Register (EMUXR) defines if the pin belongs to the ESAI or to the ESAI_1.
11.2.5
SERIAL TRANSMIT 4/RECEIVE 1 DATA PIN
(SDO4_1/SDI1_1)
SDO4_1/SDI1_1 transmits data from the TX4_1 serial transmit shift register when
programmed as a transmitter pin, or receives serial data to the RX1_1 serial receive shift
register when programmed as a receiver pin. SDO4_1/SDI1_1 may be programmed as a
general-purpose pin (PE7) when the ESAI_1 SDO4_1 and SDI1_1 functions are not being
used.
11.2.6
SERIAL TRANSMIT 5/RECEIVE 0 DATA PIN
(SDO5_1/SDI0_1)
SDO5_1/SDI0_1 transmits data from the TX5_1 serial transmit shift register when
programmed as transmitter pin, or receives serial data to the RX0_1 serial shift register when
programmed as a receiver pin. SDO5_1/SDI0_1 may be programmed as a general-purpose pin
(PE6) when the ESAI_1 SDO5_1 and SDI0_1 functions are not being used.
11.2.7
RECEIVER SERIAL CLOCK (SCKR_1)
SCKR_1 is a bidirectional pin that provides the receivers serial bit clock for the ESAI_1
interface. SCKR_1 may be programmed as a general-purpose I/O pin (PE0) when the ESAI_1
SCKR_1 function is not being used.
11.2.8
TRANSMITTER SERIAL CLOCK (SCKT_1)
SCKT_1 is a bidirectional pin that provides the transmitters serial bit clock for the ESAI_1
interface. SCKT_1 may be programmed as a general-purpose I/O pin (PE3) when the ESAI_1
SCKT_1 function is not being used.
11-4
DSP56367
MOTOROLA
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