mc9s08qg4 Freescale Semiconductor, Inc, mc9s08qg4 Datasheet - Page 111

• Manufacturer Part Number: mc9s08qg4
• Description: Hcs08 Microcontrollers Microcontroller Family
• Manufacturer: Freescale Semiconductor, Inc

8.2
The ACMP has two analog input pins, ACMP+ and ACMP– and one digital output pin ACMPO. Each of
these pins can accept an input voltage that varies across the full operating voltage range of the MCU. As
shown in
pin is connected to the comparator non-inverting input if ACBGS is a 0. As shown in
ACMPO pin can be enabled to drive an external pin.
The signal properties of ACMP are shown in
8.3
The ACMP includes one register:
Refer to the direct-page register summary in the memory section of this data sheet for the absolute address
assignments for all ACMP registers.This section refers to registers and control bits only by their names and
relative address offsets.
Some MCUs may have more than one ACMP, so register names include placeholder characters to identify
which ACMP is being referenced.
Freescale Semiconductor
•
An 8-bit status and control register
Figure
External Signal Description
Register Definition
8-2, the ACMP– pin is connected to the inverting input of the comparator, and the ACMP+
ACMPO
ACMP–
ACMP+
Signal
MC9S08QG8 and MC9S08QG4 Data Sheet, Rev. 4
Inverting analog input to the ACMP.
(Minus input)
Non-inverting analog input to the ACMP.
(Positive input)
Digital output of the ACMP.
Table 8-1. Signal Properties
Table
Function
8-1.
Chapter 8 Analog Comparator (S08ACMPV2)
I/O
O
I
I
Figure
8-2, the
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