MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 433

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

19.6.1.2 Port QA Digital Input/Output Pins
19.6.2 Port QB Pin Functions
19.6.2.1 Port QB Analog Input Pins
19.6.2.2 Port QB Digital Input Pins
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
MOTOROLA
Port QA pins are referred to as PQA[4:3, 1:0] when used as a
bidirectional 4-bit digital input/output port. These four pins may be used
for general-purpose digital input signals or digital output signals.
Port QA pins are connected to a digital input synchronizer during reads
and may be used as general-purpose digital inputs when the applied
voltages meet high-voltage input (V
requirements.
Each port QA pin is configured as an input or output by programming the
Port Data Direction Register (DDRQA). The digital input signal states are
read from the port QA Data Register (PORTQA) when DDRQA specifies
that the pins are inputs. The digital data in PORTQA is driven onto the
port QA pins when the corresponding bits in DDRQA specify output.
See
DDRQB).
The four port QB pins can be used as analog inputs or as a 4-bit digital
input-only port.
When used as analog inputs, the four port QB pins are referred to as
AN[3:0]. Because port QB functions as analog and digital input only, the
analog characteristics may be different from those of port QA.
Port QB pins are referred to as PQB[3:0] when used as a 4-bit digital
input/output port. In addition to functioning as analog input pins, the port
QB pins are also connected to the input of a synchronizer during reads
and may be used as general-purpose digital inputs when the applied
voltages meet V
Freescale Semiconductor, Inc.
19.8.4 Port QA and QB Data Direction Register (DDRQA and
For More Information On This Product,
Queued Analog-to-Digital Converter (QADC)
Go to: www.freescale.com
IH
and V
IL
requirements.
Queued Analog-to-Digital Converter (QADC)
IH
) and low-voltage input (V
Advance Information
IL
)
Signals
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