MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 473

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

19.9.2.2 Module Version Options
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
MOTOROLA
When externally multiplexed mode is selected, the QADC automatically
drives the MA output signals from the channel number in each CCW.
The QADC also converts the proper input channel (ANw, ANx, ANy, and
ANz) by interpreting the CCW channel number. As a result, up to 16
externally multiplexed channels appear to the conversion queues as
directly connected signals. User software simply puts the channel
number of externally multiplexed channels into CCWs.
Figure 19-18
pins. When external multiplexing is selected, none of the MA pins can be
used for analog or digital inputs. They become multiplexed address
outputs and are unaffected by DDRQA[1:0].
The number of available analog channels varies, depending on whether
external multiplexing is used. A maximum of eight analog channels are
supported by the internal multiplexing circuitry of the converter.
Table 19-11
with 0 to 4 external multiplexer chips.
1. The external trigger inputs are not shared with two analog input pins.
2. When external multiplexing is used, two input channels are configured as multiplexed ad-
No External
Freescale Semiconductor, Inc.
dress outputs, and for each external multiplexer chip, one input channel is a multiplexed
analog input.
For More Information On This Product,
Queued Analog-to-Digital Converter (QADC)
Mux
Directly Connected + External Multiplexed = Total Channels
8
Go to: www.freescale.com
shows the total number of analog input channels supported
shows that the two MA signals may also be analog input
One External
Number of Analog Input Channels Available
Table 19-11. Analog Input Channels
5 + 4 = 9
Mux
Two External
4 + 8 = 12
Muxes
Queued Analog-to-Digital Converter (QADC)
Three External
3 + 12 = 15
Muxes
Functional Description
Advance Information
Four External
2 + 16 = 18
(1), (2)
Muxes
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