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MC9S08DZ60ACLH Datasheet, PDF (170/416 Pages) Freescale Semiconductor, Inc – MC9S08DZ60 Series Features | |||
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Chapter 9 Analog Comparator (S08ACMPV3)
9.1.4 Block Diagram
The block diagram for the analog comparator module is shown Figure 9-2.
Internal
Reference
ACBGS
ACME
Internal Bus
Status & Control
Register
ACIE
ACF
ACOPE
ACMPx
INTERRUPT
REQUEST
ACMPx+
ACMPx-
+
-
Comparator
Interrupt
Control
ACMPxO
Figure 9-2. Analog Comparator (ACMP) Block Diagram
9.2 External Signal Description
The ACMP has two analog input pins, ACMPx+ and ACMPxâ and one digital output pin ACMPxO. Each
of these pins can accept an input voltage that varies across the full operating voltage range of the MCU.
As shown in Figure 9-2, the ACMPx- pin is connected to the inverting input of the comparator, and the
ACMPx+ pin is connected to the comparator non-inverting input if ACBGS is a 0. As shown in Figure 9-2,
the ACMPxO pin can be enabled to drive an external pin.
The signal properties of ACMP are shown in Table 9-1.
Table 9-1. Signal Properties
Signal
Function
I/O
ACMPx- Inverting analog input to the ACMP.
I
(Minus input)
ACMPx+ Non-inverting analog input to the ACMP.
I
(Positive input)
ACMPxO Digital output of the ACMP.
O
MC9S08DZ60 Series Data Sheet, Rev. 4
170
Freescale Semiconductor
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