Datasheet

The ACMP features four different inputs muxed with both positive and negative inputs to
the ACMP. One is fixed connected to built-in DAC output. ACMP0 and ACMP1 are
externally mapped on pinouts. ACMP2 is reserved.
When using the bandgap reference voltage as the reference voltage to the built-in DAC,
the user must enable the bandgap buffer by setting BGBE =1 in SPMSC1. For value of
bandgap voltage reference see Bandgap reference.
The following figure shows the device block diagram highlighting ACMP modules and
pins.
Chapter 9 Chip configurations
MC9S08PA60 Reference Manual, Rev. 1, 9/2012
Freescale Semiconductor, Inc. 245