Signal/Connection Descriptions
Table 10. Digital Audio Interface (DAX) Signals (Continued)
Signal
Name
State During
Reset
Type
Signal Description
ADO
Output
GPIO
Digital Audio Data Output—This signal is an audio and non-
Disconnected audio output in the form of AES/SPDIF, CP340 and IEC958 data
in a biphase mark format.
PD1
Input,
output, or
disconnected
Port D1—When the DAX 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.
3.11
Dedicated GPIO Interface
Table 11. Dedicated GPIO Signals
Signal
Name
State During
Type
Signal Description
Reset
PF0
Input,
GPIO
Port F0—this signal is individually programmable as input, output,
disconnected or internally disconnected. The default state after reset is GPIO
disconnected.
output, or
disconnected
Internal Pull down resistor.
This input is 5 V tolerant.
PF1
PF2
PF3
Input,
GPIO
Port F1— this signal is individually programmable as input,
disconnected output, or internally disconnected. The default state after reset is
GPIO disconnected.
output, or
disconnected
Internal Pull down resistor.
This input is 5 V tolerant.
Input,
GPIO
Port F2— this signal is individually programmable as input,
disconnected output, or internally disconnected. The default state after reset is
output, or
disconnected
GPIO disconnected.
Internal Pull down resistor.
This input is 5 V tolerant.
Input,
GPIO
Port F3—this signal is individually programmable as input, output,
disconnected or internally disconnected. The default state after reset is GPIO
disconnected.
output, or
disconnected
Internal Pull down resistor.
This input is 5 V tolerant.
Freescale Semiconductor
DSP56371 Technical Data
27
FREESCALE [ Freescale ]
