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ESAI_1 Data and Control Pins
DSP56366 24-Bit Digital Signal Processor User Manual, Rev. 4
Freescale Semiconductor 9-3
9.2 ESAI_1 Data and Control Pins
The ESAI_1 has 6 dedicated pins and shares 4 pins with the ESAI. The pins are described in the following
sections.
9.2.1 Serial Transmit 0 Data Pin (SDO0_1)
SDO0_1 transmits data from the TX0_1 serial transmit shift register. It is shared with the ESAI SDO0
signal. The pin may be used as SDO0_1 if it is not defined as ESAI SDO0. The pin may be used as GPIO
PE11 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.
9.2.2 Serial Transmit 1 Data Pin (SDO1_1)
SDO1_1 transmits data from the TX1_1 serial transmit shift register. It is shared with the ESAI SDO1
signal. The pin may be used as SDO1_1 if it is not defined as ESAI SDO1. The pin may be used as GPIO
PE10 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.
9.2.3 Serial Transmit 2/Receive 3 Data Pin (SDO2_1/SDI3_1)
SDO2_1/SDI3_1 transmits data from the TX2_1 serial transmit shift register when programmed as a
transmitter pin, or receives serial data to the RX3_1 serial receive shift register when programmed as a
receiver pin. It is shared with the ESAI SDO2/SDI3 signal. The pin may be used as SDO2_1/SDI3_1 if it
is not defined as ESA I SDO2/SDI3. The pin may be used as GPIO PE9 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.
9.2.4 Serial Transmit 3/Receive 2 Data Pin (SDO3_1/SDI2_1)
SDO3_1/SDI2_1 transmits data from the TX3_1 serial transmit shift register when programmed as a
transmitter pin, or receives serial data to the RX2_1 serial receive shift register when programmed as a
receiver pin. It is shared with the ESAI SDO3/SDI2 signal. 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.
9.2.5 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.