MC9S12G Datasheet, PDF (220/1160 Pages) Freescale Semiconductor, Inc – Ignores external trigger. Performs one conversion sequence and stops.

Reference Voltage Attenuator (RVAV1)
Chapter 4
Reference Voltage Attenuator (RVAV1)
Revision History
Rev. No. Date (Submitted
(Item No.)
By)
V00.04
26 May 2010
Sections
Affected
Substantial Change(s)
• Added reference to device overview for internal connections
V00.05
V00.06
09 Jun 2010
01 Jul 2010
• Added appendix title in note to reference reduced ADC clock
• Orthographical corrections aligned to Freescale Publications Style Guide
• Aligned to S12 register guidelines
4.1 Introduction
The reference voltage attenuator (RVA) provides a circuit for reduction of the ADC reference voltage
difference VRH-VSSA to gain more ADC resolution.
4.2 Features
The RVA has the following features:
• Attenuation of ADC reference voltage with low long-term drift
4.3 Block Diagram
The block diagram of the RVA module is shown below.
Refer to device overview section “ADC VRH/VRL Signal Connection” for connection of RVA to pins
and ADC module.
MC9S12G Family Reference Manual, Rev.1.01
220
Freescale Semiconductor
This document is valid for the S12G96 and the S12G128 device. All information related to other devices is preliminary.