SPEAR320S datasheet(22/113 Pages) STMICROELECTRONICS

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Device functions

SPEAr320S

22/113

Doc ID 022508 Rev 2

2.18

A/D converter (ADC)

SPEAr320S provides an integrated analog-to-digital converter.

Main features:

●

Successive approximation conversion method

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8 x analog input channels, ranging from 0 to 2.5 V

●

10-bit resolution

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Sampling rate up to 1 Msamples/s

●

Support for 13.5-bit resolution at 8 Ksamples/s by oversampling and accumulation

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INL ± 1 LSB, DNL ± 1 LSB

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Programmable conversion speed (minimum conversion time is 1 µs)

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Programmable averaging of multiple values from 1 (no averaging) up to 128

●

Programmable auto scan for all the 8 channels

2.19

General purpose I/Os (GPIO/XGPIO)

Up to 102 GPIOs are available in SPEAr320S when some embedded IPs are not needed in

the customer application (see Section 3.4: Shared IO pins (PL_GPIOs)).

SPEAr320S provides two mechanisms:

●

a basic GPIO module (called “basGPIO”): this functional block provides 6 pins, each

one programmable by software with the following features:

–

Programmable direction: input (default at reset) or output

–

Progammable edge-sensitive and level-sensitive interrupt triggering

●

extended GPIOs (XGPIO): this capability allows any PL_GPIO pin to be configured and

used as an alternative to the corresponding predefined signal purpose. XGPIOs have a

different register programming model from basic GPIOs with the following features:

–

Programmable direction: input or output

–

Progammable edge-sensitive interrupt triggering

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