Hardware Description; Overview - Microchip Technology Power Debugger Manual

5.

Hardware Description

5.1

Overview

The Microchip Power Debugger hardware consists of three main sections; the debugger, analog front-end, and data
gateway. The logical construction of the tool is shown here.
Figure 5-1. Logical Construction of the Power Debugger
USB
composite
device
Figure 5-2. Hardware Block Diagram
USB
DEBUG
12V
PSU
3.3V
PSU
ANALOG
PSU
TARGET
PSU
USB
TARGET
Power is supplied to the Power Debugger from the USB bus connected to the DEBUG port, regulated to 3.3V by a
step-down switch-mode regulator. The VTG pins are used as a reference input-only, and a separate power supply
feeds the variable-voltage side of the on-board level converters. At the heart of the Power Debugger main board is
the Microchip AVR UC3 microcontroller AT32UC3A3256, which runs at up to 84 MHz depending on the tasks being
©
2020 Microchip Technology Inc.
HID interface
CDC interface
Application debugging
(SPI, TWI, USART, GPIO)
Data Gateway
Interface
SDRAM
AVR
UC3A3
AVR
XMEGA
Programming
and Debugging
Application
debugging (printf)
Power measurement
DEBUG I/O FILTERS &
LEVEL SHIFT PROTECTION
BUF
CALIBRATION VOLTAGE
NETWORK REFERENCE
ANALOG
CHANNELS
User Guide
Power Debugger
Hardware Description
AVR and SAM
headers
DGI headers
Analog headers
DGI
HEADERS
DEBUG
HEADERS
ANALOG
HEADERS
USB
TARGET
DS40002201A-page 77