MC9S08SH8CSC 查看數據表（PDF） - Freescale Semiconductor

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MC9S08SH8CSC

HCS08 Microcontrollers

Freescale Semiconductor 

Chapter 8 Analog Comparator (S08ACMPV2)

8.4 Functional Description

The analog comparator can be used to compare two analog input voltages applied to ACMP+ and ACMP-;

or it can be used to compare an analog input voltage applied to ACMP- with an internal bandgap reference

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 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 be driven

onto the ACMPO pin using ACOPE.

MC9S08SH8 MCU Series Data Sheet, Rev. 3

Freescale Semiconductor

119

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