MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 431

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

19.5.2 Stop Mode
19.6 Signals
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
MOTOROLA
Although the QADC saves a pointer to the next CCW in the current
queue, software can force the QADC to execute a different CCW by
reconfiguring the QADC. When the QADC exits debug mode, it looks at
the queue operating modes, the current queue pointer, and any pending
trigger events to decide which CCW to execute.
The QADC enters a low-power idle state whenever the QSTOP bit is set
or the CPU enters low-power stop mode.
QADC stop:
Because the bias currents to the analog circuit are turned off in stop
mode, the QADC requires some recovery time (t
analog circuits.
The QADC uses the external pins shown in
channel/port pins that can support up to 18 channels when external
multiplexing is used (including internal channels). All of the channel pins
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Freescale Semiconductor, Inc.
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Queued Analog-to-Digital Converter (QADC)
Disables the analog-to-digital converter, effectively turning off the
analog circuit
Aborts the conversion sequence in progress
Makes the Data Direction Register (DDRQA), Port Data Registers
(PORTQA and PORTQB), Control Registers (QACR2, QACR1,
and QACR0) and the Status Registers (QASR1 and QASR0)
read-only. Only the Module Configuration Register (QADCMCR)
remains writable.
Makes the RAM inaccessible, so that valid data cannot be read
from RAM (result word table and CCW) or written to RAM (result
word table and CCW)
Resets QACR1, QACR2, QASR0, and QASR1
Holds the QADC periodic/interval timer in reset
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Queued Analog-to-Digital Converter (QADC)
Figure
SR
19-2. There are eight
) to stabilize the
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Signals
431