User's Manual


PDS5_HIO_v02.800
Confidential / Preliminary
2014-10-24
Cinterion
®
PDS5-E/PDS5-US Hardware Interface Overview
2.1 Application Interface
Page 16
of 37
2.1.4 Digital Audio Interface
PDS5-E/PDS5-US‘s digital audio interface (DAI) can be used to connect audio devices capable
of pulse code modulation (PCM).
2.1.5 GPIO Interface
PDS5-E/PDS5-US offers a GPIO interface with 8 GPIO lines. The GPIO lines are shared with
other interfaces or functions: Fast shutdown (see Section 2.1.11.4), the PWM functionality (see
Section 2.1.9), an pulse counter (see Section 2.1.10).
The following table shows the configuration variants for the GPIO pads. All variants are mutu-
ally exclusive, i.e. a pad configured for instance as fast shutdown line is locked for alternative
usage as GPIO.
Table 2: GPIO lines and possible alternative assignment
GPIO Fast Shutdown PWM Pulse Counter
GPIO2
GPIO4 FST_SHDN
GPIO5
GPIO6 PWM2
GPIO7 PWM1
GPIO8 COUNTER
GPIO9
GPIO10
After startup, the above mentioned alternative GPIO line assignments can be configured using
AT commands (see [1]). The configuration is non-volatile and available after module restart.