Техническая Спецификация для Freescale Semiconductor Tower System Eval Kit for MC9S12GN32 TWR-S12GN32-KIT TWR-S12GN32-KIT
Модели
TWR-S12GN32-KIT
MC9S12G Family Reference Manual, Rev.1.23
Freescale Semiconductor
263
Chapter 4
Reference Voltage Attenuator (RVAV1)
Reference Voltage Attenuator (RVAV1)
Revision History
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.
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.
and ADC module.
Rev. No.
(Item No.)
Date (Submitted
By)
Sections
Affected
Substantial Change(s)
V00.05
09 Jun 2010
• Added appendix title in note to reference reduced ADC clock
• Orthographical corrections aligned to Freescale Publications Style Guide
• Orthographical corrections aligned to Freescale Publications Style Guide
V00.06
01 Jul 2010
• Aligned to S12 register guidelines
V01.00
18 Oct 2010
• Initial version