MC9RS08KA8RM Datasheet, PDF (91/190 Pages) Freescale Semiconductor, Inc – MC9RS08KA8 Features

Analog Comparator (RS08ACMPV1)
voltage. ACBGS is used to select between the bandgap reference voltage or the ACMP+ pin as the input
to the non-inverting input of the analog comparator.
The comparator output is high when the non-inverting input is greater than the inverting input, and it is
low when the non-inverting input is less than the inverting input. ACMOD is used to select the condition
which will cause ACF to be set. ACF can be set on a rising edge of the comparator output, a falling edge
of the comparator output, or either a rising or a falling edge (toggle). The comparator output can be read
directly through ACO. The comparator output can also be driven onto the ACMPO pin using ACOPE.
NOTE
Comparator inputs are high impedance analog pins which are sensitive to
noise. Noisy V_DD and/or pin toggling adjacent to the analog inputs may
cause the comparator offset/hysteresis performance to exceed the specified
values. Maximum source impedance is restricted to the value specified in
MC9RS08KA8 Series Data Sheet. To achieve maximum performance
device is recommended to enter WAIT/STOP mode for ACMP
measurement and adjacent pin toggling must be avoided.
MC9RS08KA8 Series Reference Manual, Rev. 3
Freescale Semiconductor
91