mc9s08qg8 Freescale Semiconductor, Inc, mc9s08qg8 Datasheet - Page 105
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mc9s08qg8
Manufacturer Part Number
mc9s08qg8
Description
Hcs08 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC9S08QG8.pdf
(300 pages)
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Chapter 8
Analog Comparator (S08ACMPV2)
8.1
The analog comparator module (ACMP) provides a circuit for comparing two analog input voltages or for
comparing one analog input voltage to an internal reference voltage. The comparator circuit is designed to
operate across the full range of the supply voltage (rail-to-rail operation).
Figure 8-1
8.1.1
When using the bandgap reference voltage for input to ACMP+, the user must enable the bandgap buffer
by setting BGBE =1 in SPMSC1 see
Register
8.1.2
The ACMP module can be configured to connect the output of the analog comparator to TPM input capture
channel 0 by setting ACIC in SOPT2. With ACIC set, the TPMCH0 pin is not available externally
regardless of the configuration of the TPM module.
Freescale Semiconductor
(SPMSC1)”. For value of bandgap voltage reference see
Introduction
shows the MC9S08QG8/4 block diagram with the ACMP highlighted.
ACMP Configuration Information
ACMP/TPM Configuration Information
MC9S08QG8 and MC9S08QG4 Data Sheet, Rev. 1.01
Section 5.8.8, “System Power Management Status and Control 1
Section A.5, “DC
Characteristics”.
105