Motorola ColdFire MCF5281 - Manual (Page 45)

Overview
Freescale Semiconductor 1-13
1.2.4 Queued Serial Peripheral Interface (QSPI)
The queued serial peripheral interface module provides a synchronous serial peripheral interface with
queued transfer capability. It allows up to 16 transfers to be queued at once, eliminating CPU intervention
between transfers.
1.2.5 Queued Analog-to-Digital Converter (QADC)
The QADC is a 10-bit, unipolar, successive approximation converter. A maximum of 8 analog input
channels can be supported using internal multiplexing. A maximum of 18 input channels can be supported
in the internal/external multiplexed mode.
The QADC consists of an analog front-end and a digital control subsystem. The analog section includes
input pins, an analog multiplexer, and sample and hold analog circuits. The analog conversion is performed
by the digital-to-analog converter (DAC) resistor-capacitor array and a high-gain comparator.
The digital control section contains queue control logic to sequence the conversion process and interrupt
generation logic. Also included are the periodic/interval timer, control and status registers, the 64-entry
conversion command word (CCW) table, and the 64-entry result table.
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3