mc9rs08ka2 Freescale Semiconductor, Inc, mc9rs08ka2 Datasheet - Page 84

• Manufacturer Part Number: mc9rs08ka2
• Description: Rs08 Microcontrollers 8-bit Microcontroller Family
• Manufacturer: Freescale Semiconductor, Inc

Chapter 10 Analog Comparator (RS08ACMPV1)
10.2
The ACMP has two analog input pins, ACMP+ and ACMP–, and one digital output pin, ACMPO. Each of
the input pins can accept an input voltage that varies across the full operating voltage range of the MCU.
As shown in
ACMP+ pin is connected to the non-inverting input of the comparator if ACBGS=0. As shown in
Figure
The signal properties of ACMP are shown in
10.3
The ACMP includes one register:
Refer to the direct-page register summary in the memory chapter of this data sheet for the absolute address
assignments for all ACMP registers.
10.3.1
ACMPSC contains the status flag and control bits which are used to enable and configure the ACMP.
84
•
10-2, the ACMPO pin can be enabled to drive an external pin.
An 8-bit status and control register
Reset:
External Signal Description
Register Definition
ACMP Status and Control Register (ACMPSC)
W
R
Figure
ACME
0
7
10-2, the ACMP– pin is connected to the inverting input of the comparator, and the
Figure 10-3. ACMP Status and Control Register (ACMPSC)
ACMPO
ACMP+
ACMP-
Signal
= Unimplemented
ACBGS
0
6
MC9RS08KA2 Series Data Sheet, Rev. 3
Inverting analog input to the ACMP
(Minus input)
Non-inverting analog input to the ACMP
(Positive input)
Digital output of the ACMP
Table 10-1. Signal Properties
ACF
5
0
Table
Function
ACIE
0
10-1.
4
ACO
0
3
ACOPE
0
2
I/O
O
I
I
0
1
Freescale Semiconductor
ACMOD
0
0