MC9S12GRMV1 Datasheet, PDF (573/1292 Pages) Freescale Semiconductor, Inc – MC9S12G Family Reference Manual and Data Sheet

Digital Analog Converter (DAC_8B5V)
If the “Unbuffered DAC” mode was used before entering stop mode, then the DACU pin will reach
VRH voltage level during stop mode.
The content of the configuration registers is unchanged.
17.2.3 Block Diagram
VRH
S3
DACU
Internal
Bus
DAC
Resistor
Network
VRL
S2 –
+
S1
S2
S1
Operational Amplifier
Configuration
Registers
AMPM
AMP
AMPP
Figure 17-1. DAC_8B5V Block Diagram
17.3 External Signal Description
This section lists the name and description of all external ports.
17.3.1 DACU Output Pin
This analog pin drives the unbuffered analog output voltage from the DAC resistor network output, if the
according mode is selected.
17.3.2 AMP Output Pin
This analog pin is used for the buffered analog output voltage from the operational amplifier output, if the
according mode is selected.
17.3.3 AMPP Input Pin
This analog input pin is used as input signal for the operational amplifier positive input pin, if the according
mode is selected.
MC9S12G Family Reference Manual, Rev.1.23
Freescale Semiconductor
575