S9S12XS256J0CAL Datasheet, PDF (294/738 Pages) Freescale Semiconductor, Inc – Microcontrollers

Analog-to-Digital Converter (ADC12B16CV1)
10.4.2.2 General-Purpose Digital Port Operation
The input channel pins can be multiplexed between analog and digital data. As analog inputs, they are
multiplexed and sampled as analog channels to the A/D converter. The analog/digital multiplex operation
is performed in the input pads. The input pad is always connected to the analog input channels of the
ADC12B16C. The input pad signal is buffered to the digital port registers. This buffer can be turned on or
off with the ATDDIEN register. This is important so that the buffer does not draw excess current when
analog potentials are presented at its input.
10.5 Resets
At reset the ADC12B16C is in a power down state. The reset state of each individual bit is listed within
the Register Description section (see Section 10.3.2, “Register Descriptions”) which details the registers
and their bit-field.
10.6 Interrupts
The interrupts requested by the ADC12B16C are listed in Table 10-24. Refer to MCU specification for
related vector address and priority.
Table 10-24. ATD Interrupt Vectors
Interrupt Source
Sequence Complete Interrupt
Compare Interrupt
CCR
Mask
I bit
I bit
Local Enable
ASCIE in ATDCTL2
ACMPIE in ATDCTL2
See Section 10.3.2, “Register Descriptions” for further details.
S12XS Family Reference Manual, Rev. 1.13
294
Freescale Semiconductor