MPC5645S datasheet(17/146 Pages) FREESCALE

17 / 146 page

Qorivva MPC5645S Microcontroller Data Sheet, Rev. 8

Freescale Semiconductor

1.4.21

Analog-to-Digital Converter (ADC)

The ADC features the following:

•

10-bit A/D resolution

•

0–5 V or 0–3.3 V common mode conversion range

•

Supports conversions speeds of up to 1

s

•

20 internal and 8 external channels support

•

Up to 20 single-ended inputs channels

— 10 channels configured as input only pins

–

10-bit ± 2 counts accuracy (TUE)

— 10 channels configured to have alternate function as general purpose input/output pins

–

10-bit ± 3 counts accuracy (TUE)

•

External multiplexer support to increase up to 27 channels

— Automatic 1 × 8 multiplexer control

— External multiplexer connected to a dedicated input channel

— Shared register between the 8 external channels

•

Result register available for every non-multiplexed channel

•

Configurable Left or Right aligned result format

•

Supports for one-shot, scan, and injection conversion modes

•

Injection mode status bit implemented on adjacent 16-bit register for each result

— Supports Access to Result and injection status with single 32-bit read

•

Independently enabling of function for channels:

— Pre-sampling

— Offset error cancellation

—Offset Refresh

•

Conversion Triggering support

— Internal conversion triggering from periodic interrupt timer (PIT)

•

Four configurable analog comparator channels offering range comparison with triggered alarm

— Greater than

— Less than

— Out of range

•

All unused analog pins available as general purpose input pins

•

Selected unused analog pins available as general purpose pins

•

Power Down mode

•

Optional support for DMA transfer of results

1.4.22

Deserial Serial Peripheral Interface (DSPI)

The DSPI modules provide a synchronous serial interface for communication between the MCU and external devices.

The DSPI features:

•

Full duplex, synchronous transfers

•

Master or slave operation

•

Programmable master bit rates

•

Programmable clock polarity and phase

•

End-of-transmission interrupt flag

•

Programmable transfer baud rate

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