MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 428

• Manufacturer Part Number: MMC2114
• Description: M CORE Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Queued Analog-to-Digital Converter (QADC)
19.3 Features
Advance Information
428
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 (RC) 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 conversion
command word (CCW) table, random-access memory (RAM), and the
result table RAM.
The bus interface unit (BIU) provides access to registers that configure
the QADC, control the analog-to-digital converter and queue
mechanism, and present formatted conversion results.
Features of the QADC module include:
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Freescale Semiconductor, Inc.
For More Information On This Product,
Queued Analog-to-Digital Converter (QADC)
Internal sample and hold
Up to eight analog input channels using internal multiplexing
Up to four external analog multiplexers directly supported
Up to 18 total input channels with internal and external
multiplexing
Programmable input sample time for various source impedances
Two conversion command word (CCW) queues with a total of 64
entries for setting conversion parameters of each A/D conversion
Subqueues possible using pause mechanism
Queue complete and pause interrupts available on both queues
Queue pointers indicating current location for each queue
Automated queue modes initiated by:
– External edge trigger and gated trigger
– Periodic/interval timer, within QADC module (queues 1 and 2)
– Software command
Go to: www.freescale.com
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
MOTOROLA