DSP56F801FA80E 用户编程技术手册 - NXP（恩智浦）

1 Introduction

MC56F800x DSCs have two integrated Programmable Gain

Amplifiers (PGA) that can amplify the differential signals by

up to 32 times and convert it to the single ended signal, which

is one of the on-chip ADC inputs.

On old maskset 1M53M devices, with PGA hardware trigger

mode enabled in both PGAs, each Programmable Delay Block

(PDB) trigger signal will cause a PGA to generate pre-trigger

signal to both ADCs. This results in the ADC pre-trigger

for old maskset devices, can run smoothly on the new maskset

devices.

This application note describes the new enhanced features of

PGA and the possible valid PGA configurations for different

signal sampling schemes.

Freescale Semiconductor

Document Number: AN4334

Application Note

Rev. 0, 03/2012

Use of PGA on MC56F800x

1 Introduction................................................................1

2 PGA new features.....................................................2

3 Valid PGA configurations.........................................5

4 Conclusion...............................................................20