User's Manual

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Note d’étude / Technical document : URD1– OTL

5665.3

– 003 / 72238 Edition 01

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4.9 GPIO

There are Three GPIOs available on HiloNC V2. All GPIOs have internal pull-up resistors.

GPIOs can directly be controlled with dedicated AT commands.

Thanks to some other special AT commands, GPIOs can for example be used:

• to make an I/O toggling while the module is attached to the network

• to make an I/O toggling when a programmed temperature is reached

• as input to detect the presence of an antenna (with some external additional electronic)

• as input to detect the SIM card presence …etc

4.10 ADC

There is one ADC input pad which can be used to read the value of the voltage applied. Following

characteristics must be met to allow proper performances:

• The input signal voltage must be within 0V and up to 3V

• The input impedance of the pad is 150KΩ

• The input capacitance is typically 10pF.

The AT command AT+KADC will give voltage value with following characteristics:

• 10 bits resolution

• Maximum sampling frequency is 200 KHz.

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Consult the AT command Specification document for more information about KADC AT command.

4.11 PCM

There is a master PCM interface available on HiLoNC V2. The PCM interface can be configured by dedicate AT

commands. Following characteristics must be met:

• 16 bits PCM data word length

• Configurable PCM clock rate must not exceed 1MHz

Figure 26: PCM interface timing

4.12 RF BURST INDICATOR

There is one digital output named RF_TX available on HiLoNC V2 to indicate the RF transmission. This output

can not be controlled by AT commands and can not be used for other purpose.

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This output can only connect to a transistor but not to drive a LED directly. Otherwise, the RF

transmission will be unexpected affected.