Maxim Integrated TFP3 User manual

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THE FLASH
PROGRAMMER
MODEL TFP3
User’s Guide
March 2015

©2015 Maxim Integrated Products, Inc.
All rights reserved.
Rev. 2.2, March 2015
No part of this documentation may be reproduced nor distributed in any form or by any means,
graphic, electronic, or mechanical, including but not limited to photocopying, scanning,
recording,
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-mailing, or storing in information storage and retrieval systems without the written
permission of Maxim Integrated
Products, Inc. (hereafter, “Maxim”). Products that are referenced in
this document such as Microsoft Windows® may be tr
ademarks and/or registered trademarks of their
respective owners. Maxim makes no claim to these trademarks. While every precaution has been
taken in the preparation of this document, individually, as a series, in whole, or in part, Maxim, the
publisher, an
d the author assume no responsibility for errors or omissions, including any damages
resulting from the express or implied application of information contained in this document or from
the use of products, services, or programs that may accompany it. In no
event shall Maxim, publishers,
authors, or editors of this guide be liable for any loss of profit or any other commercial damage caused
or alleged to have been caused directly or indirectly by this document.

CONTENTS
1Introduction........................................................................................................ 5
1.1 TFP3 Overview...................................................................................................................................5
1.2 TFP3 Features ....................................................................................................................................7
1.3 Safety and ESD Notes ........................................................................................................................7
1.4 TFP3 Kit Contents ..............................................................................................................................7
1.5 System Requirements........................................................................................................................8
2Getting Started.................................................................................................... 9
2.1 Connections to the Host and Setup...................................................................................................9
2.2 TFP3 Connection to the Host...........................................................................................................10
2.3 Using the TFP3 in Host Mode ..........................................................................................................11
2.3.1 Procedure to Communicate with the TFP3 Device via TFP3.EXE.....................................................11
2.3.2 Procedure to Communicate with the TFP3 Device via TFP3GUI.EXE...............................................12
2.4 TFP3 Secure Model Initialization .....................................................................................................13
2.5 TFP3 Non-Secure Model Initialization .............................................................................................13
3Features............................................................................................................ 14
3.1 Programming the TFP3 Internal Flash Memory...............................................................................14
3.1.1 Steps for Programming the TFP3 Internal Flash Memory ...............................................................14
3.2 Stand-Alone/Pushbutton Programming ..........................................................................................15
3.2.1 Steps for Performing Pushbutton Programming .............................................................................15
3.3 ICE Port............................................................................................................................................15
3.4 ATE Programming ............................................................................................................................17
3.4.1 Steps for ATE Programming .............................................................................................................19
3.4.2 Flash Sizes of Energy Metering Microcontrollers ............................................................................20
3.4.3 ATE Programming Sequence............................................................................................................21
3.5 TFP3 Diagnosis Information Access .................................................................................................22
3.5.1 Programming Counts.......................................................................................................................22
3.5.2Total Pass Counts.............................................................................................................................22
3.5.3 Total Fail Counts ..............................................................................................................................22
3.6 Secured Dumping of Target Code to Host .......................................................................................22
3.7 TFP3 GUI Operation.........................................................................................................................23
3.8 Generation and Loading of a Package File for TFP3 Secure Models................................................28
3.9 TFP3 Parameter Preservation ..........................................................................................................30
3.10 TFP3 Firmware Upgrade Using In-Application Programming ..........................................................31
3.11 Loading of DUT Hex File to the TFP3 ...............................................................................................33
4Status Indications.............................................................................................. 34
4.1 LED and Buzzer Indication ...............................................................................................................34
5Supported Commands....................................................................................... 35
5.1 Commands Common to Secure and Non-Secure Models of the TFP3 ............................................37
5.2 Commands Supported Only by the Secure Model of the TFP3 .......................................................39
5.3 Commands Supported Only by the Non-Secure Model of the TFP3 ...............................................41

6Hardware Specifications.................................................................................... 42
7Ordering Information ........................................................................................ 43
8Glossary of Terms and Abbreviations................................................................. 44
TABLES
Table 1: TFP3 Versions .....................................................................................................................................5
Table 2: ICE Connector to JTAG Cable (2x5) for TFP3Q-MAXQ30 and TFP3L-MAXQ30..................................16
Table 3: ICE Connector to ICE Cable (7x1)......................................................................................................16
Table 4: ATE Connector Pin Descriptions .......................................................................................................19
Table 5: Maximum Flash Sizes of Different Energy Metering Microcontrollers .............................................20
Table 6: Parameter Data Alignment ...............................................................................................................31
Table 7: Status LED and Buzzer Indications....................................................................................................34
Table 8: TFP3 Supported Commands.............................................................................................................35
Table 9: Commands Common to Both Secure and Non-Secure Models........................................................37
Table 10: Commands Supported Only by the Secure Model .........................................................................39
Table 11: Commands Supported Only by the Non-Secure Model .................................................................41
Table 12: Ordering Numbers..........................................................................................................................43
FIGURES
Figure 1: Secure TFP3 8051 Device Model Number TFP3-8051 ......................................................................6
Figure 2: Secure TFP3 MAXQ30 Device Model Number TFP3Q-MAXQ30 .......................................................6
Figure 3: Non-Secure TFP3 MAXQ30 Device Model Number TFP3L-MAXQ30 ................................................6
Figure 4: TFP3 Typical Connection Diagram.....................................................................................................9
Figure 5: Device Manager ..............................................................................................................................10
Figure 6: COM Port Enumeration...................................................................................................................10
Figure 7: Navigating the Path to the TFP3.EXE ..............................................................................................11
Figure 8: Executing TFP3 Secure Model Commands Using the TFP3.EXE ......................................................11
Figure 9: Executing TFP3 Non-Secure Model Commands Using the TFP3.EXE ..............................................12
Figure 10: ATE Connector Pin Locations ........................................................................................................18
Figure 11: ATE Programming Sequence Flowchart ........................................................................................21
Figure 12: Flowchart for Execution of Load Package File Command on Target Side......................................29
Figure 13: TFP3 Memory Partition Layout .....................................................................................................32
Figure 14: TFP3 IAP Programming Sequence and Code Execution ................................................................33

The Flash Programmer Model TFP3 User's Guide Chapter 1: Introduction
Rev. 2.2, March 2015 Maxim Integrated Page 5
1Introduction
The TFP3 (The Flash Programmer 3) is a multipurpose programmer from Maxim Integrated used to
perform flash utility operations on Maxim energy metering SOCs. The available versions of the TFP3 are
listed in Table 1.
Table 1: TFP3 Versions
ID Function Ordering Part Number
TFP3-8051
Flash Programmer for 8051-based Metering
Devices. With Security (1)
80515-FPBM-TFP3
TFP3L-MAXQ30
Flash Programmer for ZON™ Family Metering
Devices (MAXQ®-based). No Security
MAXQ30-FPBM-TFP3L#
TFP3Q-MAXQ30
Flash Programmer for ZON™ Family Metering
Devices (MAXQ-based). With Security (1)
MAXQ30-FPBM-TFP3Q#
(1) With the security feature, the programming content is stored, programmed, and verified using AES
128-bit security.
This user’s guide documents how to connect, set up, initialize, and perform flash utility operations and
firmware upgrades using the TFP3. It also provides a detailed explanation of supported commands and
insight into the various features of the TFP3 models with and without security features.
1.1 TFP3 Overview
The TFP3 is used to perform flash utility operations on Maxim Integrated‘s energy metering SoCs. The
TFP3 has three operating modes:
•stand-alone
•host
•ATE
In the Stand-Alone mode, the TFP3 is used to program and verify the DUT. By pressing the pushbutton
switch, the DUT is programmed with and verified against the preloaded flash programming file.
The Host mode is used to send and receive commands to/from the TFP3 using a GUI or CLI application,
running on a Windows PC, via USB interface. In addition to performing flash utility operations, Host mode
is also used to get diagnostic information and upgrade the programming file on the TFP3.
ATE mode is used for factory automation using the TFP3. Using this mode, the TFP3 can program and
verify without using any host applications. The external ATE hardware, connected to the TFP3, drives the
ATE signals to perform a program and verify operation of the DUT firmware.
TFP3 has internal flash memory, which can store a maximum 512KB file size of DUT firmware. The secure
models of TFP3 also provide a high level of security to the DUT firmware by supporting features like AES
key matching and data encryption/decryption using AES hardware. A USB interface is used to power up
the TFP3 device and for communication with the host. The TFP3 can power the DUT at 3.3VDC with up to
300mA.
MAXQ is a registered trademark and ZON is a trademark of Maxim Integrated Products, Inc.

Chapter 1: Introduction The Flash Programmer Model TFP3 User's Guide
Page 6 Maxim Integrated Rev. 2.2, March 2015
There are two variants of TFP3 devices available in the market:
•The TFP3 secure model is used for performing flash utility operations securely via a hardware AES
encryption in ECB mode and decryption mechanism to protect the DUT's IP and also to restrict
access to the device to authorized users.
•The TFP3 non-secure model does not use any security mechanism and allows the user much
easier access to download and flash utility operations.
Figure 1: Secure TFP3 8051 Device Model Number TFP3-8051
Figure 2: Secure TFP3 MAXQ30 Device Model Number TFP3Q-MAXQ30
Figure 3: Non-Secure TFP3 MAXQ30 Device Model Number TFP3L-MAXQ30

The Flash Programmer Model TFP3 User's Guide Chapter 1: Introduction
Rev. 2.2, March 2015 Maxim Integrated Page 7
1.2 TFP3 Features
The TFP3 is a multipurpose flash programming device with the features listed below. Each feature is
explained in detail in the following chapters.
●Programming of the TFP3 internal flash memory
●Pushbutton programming of the DUT via CC51 or JTAG Interface
●Host application-based programming of DUT via CC51 or JTAG Interface
●ATE -based programming of DUT via CC51 or JTAG Interface
●TFP3 diagnostic info access
●Secure dumping of the DUT code image to the host
●TFP3 GUI operation
●Generation and loading of the package file
●TFP3 parameter preservation
●Downloading of the DUT hex file to the TFP3
●TFP3 firmware upgrade using in-application programming
1.3 Safety and ESD Notes
Standard ESD handling precautions should be employed whenever handling electronic equipment. The
TFP3 Flash Programmer utilizes ESD protection devices on its cable interfaces. Potential equipment
damage and/or malfunction are possible if work-surface grounding procedures are not incorporated.
TFP3 ESD protection devices do not protect the target’s hardware (DUT). Also, if the TFP3
device is connected to a target while the target is being powered using AC mains, then the
ICE port and the ATE port are now high voltage. Correct handling procedures and proper
work area grounding minimizes damage to all equipment!
1.4 TFP3 Kit Contents
●TFP3 Device
●FC-10 cable for CC51 or JTAG connection, 20-25cm in length
●USB A-to-B cable to connect the TFP3 to the host (PC) or to a USB 5V DC adapter (not
provided with the kit)
●CD-ROM containing:
○TFP3 Windows installation executable (TFP3 XX-YY.exe) with Microsoft .NET 4.0
packaged for TFP3 GUI and CLI application software
○TFP3 Host USB CDC driver
○TFP3 User's Guide
○TFP3 Quick Start Guide

Chapter 1: Introduction The Flash Programmer Model TFP3 User's Guide
Page 8 Maxim Integrated Rev. 2.2, March 2015
1.5 System Requirements
The TFP3 operating in host mode requires a Windows PC with the following features:
●1 GHz processor and 1 GB RAM
●Minimum 1024 x 768 video display resolution
●Available USB port
●Microsoft Windows® 7 or Windows XP
Windows is a registered trademark of Microsoft Corp.

The Flash Programmer Model TFP3 User's Guide Chapter 2: Getting Started
Rev. 2.2, March 2015 Maxim Integrated Page 9
2Getting Started
This section provides details on connections, setup, and initialization procedures of the TFP3 device.
Note: In the following sections, software-related items are identified by bolding. Text in bold refers to
items directly from the EV Kit software. Text in bold and underlined refers to items from the
Microsoft Windows operating system.
2.1 Connections to the Host and Setup
The TFP3 connects to a host PC with a USB A-to-B cable, and the cable provides both data and power (no
external supplies are needed). Figure 4shows the basic connection diagrams for the TFP3 for
programming ZON (MAXQ30-based) and 71M65xx (8051-based) parts. It is possible to operate the TFP3 in
both stand-alone (only target and TFP3) and PC-connected configurations. For stand-alone configurations,
the TFP3 has to be powered via the USB connector.
TFP3
USB Cable ATE
ICE
MAXQ-Based
Device
Stand-Alone
Configuration
TFP3
USB Cable 8051-Based
Device
Stand-Alone
Configuration
ATE
ICE
Host/Power
Host/Power
Figure 4: TFP3 Typical Connection Diagram

Chapter 2: Getting Started The Flash Programmer Model TFP3 User's Guide
Page 10 Maxim Integrated Rev. 2.2, March 2015
2.2 TFP3 Connection to the Host
The following steps are required to connect the TFP3 to the host successfully. Follow these steps before
starting any communication with the TFP3 from the host.
1. Connect USB A-to-B cable between the host and the TFP3 device.
2. When the TFP3 is connected to the host, the status LED should be red first and turn to green
continuously for the TFP3-8051 model. For other models of the TFP3, the LED is continuously
green when connected to the host.
3. When the notification window with the text, "Installing device driver software," appears on
the PC screen, go to Start > Control Panel > Device Manager > Other Devices. Right-click on
"MAXQ CDC-ACM Demo," and update the driver software by pointing to the "Oem54.inf"
file on the CD-ROM included in the TFP3 Programmer's Kit.
Figure 5: Device Manager
4. When the TFP3 Host driver software installation is successful, the TFP3 device is enumerated
as a COM port, as shown in Figure 6.
Figure 6: COM Port Enumeration

The Flash Programmer Model TFP3 User's Guide Chapter 2: Getting Started
Rev. 2.2, March 2015 Maxim Integrated Page 11
2.3 Using the TFP3 in Host Mode
The Host mode is used to get diagnostic information and upgrade the programming file on the TFP3. Once
the TFP3 device is connected, powered on, and enumerated as a COM port, the user can start sending
commands and receiving responses from the TFP3 in host mode using a command-line interface utility
(TFP3.exe) or GUI application.
2.3.1 Procedure to Communicate with the TFP3 Device via TFP3.EXE
1. Open the Windows command prompt on the PC (Start > Run > cmd).
2. Enter the command cd xxxx, where “xxxx” is the path to where the TFP3.exe file is saved.
3. Execute the required commands using the TFP3.exe console.
The steps in the figures below detail the commands to get the version of the TFP3, set model type, set
flash size of the DUT, and master erase the flash of the D U T.
Figure 7: Navigating the Path to the TFP3.EXE
Figure 8: Executing TFP3 Secure Model Commands Using the TFP3.EXE

Chapter 2: Getting Started The Flash Programmer Model TFP3 User's Guide
Page 12 Maxim Integrated Rev. 2.2, March 2015
Figure 9: Executing TFP3 Non-Secure Model Commands Using the TFP3.EXE
For details of the commands supported by the TFP3, see Chapter 5: Supported Commands or the sample
commands document provided in the TFP3 GUI installation folder for examples of usage with the host
application.
TFP3 Host Mode communication should not be performed until the TFP3 enumerates as a
COM port.
2.3.2 Procedure to Communicate with the TFP3 Device via TFP3GUI.EXE
1. Open the TFP3 GUI on the PC by clicking on Start > All Programs > Maxim Integrated > TFP3 >
TFP3GUI.EXE.
2. Select the Model type through which the DUT communication is achieved from Select Model
Type drop-down menu.
3. Select the DUT flash size connected to the TFP3 from Select DUT Flash Size drop-down menu.
4. The TFP3 GUI will auto-detect the TFP3 device and connect to it.
To manually configure and connect to the TFP3:
a. On the Options menu, select Configure serial port, and choose the correct serial port
number.
b. On the Target menu, select Connect to TFP3 device to connect with the TFP3 device
from the Host.
5. Send the required commands to the TFP3 device by selecting from the four command groups
listed under the File menu.
For more details on using the TFP3 GUI, click on the application’s Help menu, and select Contents and
Index.

The Flash Programmer Model TFP3 User's Guide Chapter 2: Getting Started
Rev. 2.2, March 2015 Maxim Integrated Page 13
2.4 TFP3 Secure Model Initialization
The TFP3 needs to be initialized with the following commands before performing any other operations.
This sequence is necessary to ensure that the DUT firmware is securely updated or verified.
1. Execute the Modify AES keys command (K) to modify the AES 128-bit keys in the TFP3.
2. Execute the Select Model Type command (I) to identify which type of TFP3 is used for DUT
communication.
3. Execute the Set Flash Size command (F) to identify which type of target is connected to TFP3.
4. (Optional) Execute the Set DUT Serial Number Count command (K) to set the unique serial
number of the DUT connected to TFP3. This command is required to send to the TFP3 device
only if the parameter preservation feature is required by the us er.
5. Execute the Set TFP3 JTAG Clock command (J) to set the clock by which the DUT
communicates with the TFP3. Supported by the TFP3Q-MAXQ30 Model.
2.5 TFP3 Non-Secure Model Initialization
The TFP3 non-secure model needs to be initialized with the following commands before performing any
other operations. This sequence is necessary to ensure that the DUT firmware is updated or verified
properly.
1. Execute the Select Model type command (I) to identify which type of TFP3 is used for DUT
communication.
2. Execute the Set Flash Size command (F) to identify which type of target is connected to the
TFP3.
3. Execute the Set TFP3 JTAG Clock command (J) to set the clock by which the DUT
communicates with the TFP3. Supported by the TFP3L-MAXQ30 Model.
4. Execute the Set TFP3 Programming Count command (m) to set the maximum number of
times the TFP3 can perform the program and verify operation.

Chapter 3: Features The Flash Programmer Model TFP3 User's Guide
Page 14 Maxim Integrated Rev. 2.2, March 2015
3Features
3.1 Programming the TFP3 Internal Flash Memory
The TFP3 Programmer allows programming devices with a flash size up to 512KB. The DUT firmware is
downloaded to the TFP3 using the USB interface and host application software. On the TFP3 secure model,
the DUT firmware is AES ECB encrypted before storing it in the TFP3 internal memory. This ensures that
the DUT firmware is protected from unauthorized access.
Setting the wrong model type and flash size values in the TFP3 will result in incorrect data
being programmed in the DUT.
3.1.1 Steps for Programming the TFP3 Internal Flash Memory
1. Execute Set Model Type command (I) to set the model type of the TFP3 connected to the
DUT.
2. Execute Set Flash Size command (F) to set the flash size of the connected D U T.
3. Execute Generate Package File command (g) to create a package file for the TFP3 Secure
model.
4. Execute Load Package File command (H) to send it to the TFP3 device (TFP3 secure model).
For the TFP3 non-secure model, execute the Load Hex File command (H) to send the DUT
hex file to the TFP3 device.
For details of the commands supported by the TFP3, see Chapter 5: Supported Commands or the sample
commands document provided in the TFP3 GUI installation folder for examples of commands that can be
used with the host application.

The Flash Programmer Model TFP3 User's Guide Chapter 3: Features
Rev. 2.2, March 2015 Maxim Integrated Page 15
3.2 Stand-Alone/Pushbutton Programming
This mode is used to perform only the DUT program and verify operation. This mode does not use host
application software. A pushbutton switch on the TFP3 front panel is used to start this operation. The TFP3
indicates the USB enumeration failed by toggling the status LED between green and red and sounding a
buzzer five times (300ms apart).
3.2.1 Steps for Performing Pushbutton Programming
1. Connect the DUT to the TFP3 using an FC-10 Flat interface cable.
2. Connect the TFP3 to the DC adapter using a USB A-to-B cable. This step is required to power
on the TFP3.
3. The status LED will toggle from red to green and the buzzer will sound five times (300ms
apart) to indicate that the TFP3 USB enumeration failed.
4. Press the red pushbutton switch for 300ms, and then release it to start the program and
verify operation of the DUT firmware.
The status LED will toggle from red to green until the program and verify operation is complete.
If the TFP3 completes the program and verify operation successfully, the status LED turns green to indicate
the programming and verification of the DUT flash memory is successful.
If the TFP3 does not complete the program and verify operation successfully, the status LED remains red
and the buzzer will sound 3 times to indicate the failure.
3.3 ICE Port
The ICE port is used for DUT programming. The standard CC51 (TFP3-8051) and JTAG interface (TFP3L-
MAXQ30, TFP3Q-MAXQ30) define the ICE port signals function TFP3.
Note: The cable port connected to the TFP3 device has pin 1 on the top left as shown above. Also, there is
a notch on this connector, so it can only plug into the TFP3 device in one direction.
Pin 1

Chapter 3: Features The Flash Programmer Model TFP3 User's Guide
Page 16 Maxim Integrated Rev. 2.2, March 2015
Table 2and Table 3 describe the pin assignment on the cable port connected to the DUT for the various
TFP3 models.
Note: The side of the connector where Pin 1 is located is marked with a triangle.
Table 2: ICE Connector to JTAG Cable (2x5) for TFP3Q-MAXQ30 and TFP3L-MAXQ30
Pin Number
Signal
Function
1
ICE_E
Enables the programming interface when
high
2
GND
Ground, return
3
E_RST
Emulator reset
4
VCC
Supply Power (+3.3VDC at 300mA, max)
5
E_TCLK
Emulator clock
6
TMUX
Optional signal. Not required for
programming.
7
N/C
Not connected
8
N/C
Not Connected. (+5VDC for TFP3L-MAXQ30)
9
E_RXTX
Emulator data (RX and TX), bidirectional
10
GND
Ground, return
Note: If pin 4 in Table 2 is used to power the target, then a 1000µF/10V capacitor should be placed in
between VCC and GND of the DUT board in order to prevent the TFP3 device from resetting due to the
inrush current.
To ZON Device (2x5 cable)

The Flash Programmer Model TFP3 User's Guide Chapter 3: Features
Rev. 2.2, March 2015 Maxim Integrated Page 17
Table 3: ICE Connector to ICE Cable (7x1)
Pin Number
Signal
Function
1
TMUX
Optional Signal
2
ICE_E
Enables the programming interface
when high
3
GND – RETURN
Ground, return
4
E_RST
Emulator reset
5
E_TCLK
Emulator clock
6
E_RXTX
Emulator data (RX and TX), bidirectional
7
VCC
Supply power (+3.3VDC)
Note: Even though the TFP3 can supply power to the target, many target boards (e.g. 71M653x, 71M652x)
assign V3P3D to the pin corresponding to pin 7 in Table 3. This means that the target boards still need to
be powered with a separate DC supply. If pin 7 is used to power the target, then a 1000µF/10V capacitor
should be placed in between VCC and GND of the target board in order to prevent the TFP3 device from
resetting due to the inrush current.
To 8051 Device (7x1 cable)

Chapter 3: Features The Flash Programmer Model TFP3 User's Guide
Page 18 Maxim Integrated Rev. 2.2, March 2015
3.4 ATE Programming
This mode is used to automate the programming or verification of DUT firmware using the TFP3 and
external ATE hardware. ATE hardware drives the ATE signals as per TFP3 requirements to perform the
program and verification operation. Other operations are not supported in this mode. This section
describes the ATE programming setup and software algorithm to be implemented by the ATE. Figure 10
and Table 4detail the ATE interface signals and descriptions.
Figure 10: ATE Connector Pin Locations
Pin 1

The Flash Programmer Model TFP3 User's Guide Chapter 3: Features
Rev. 2.2, March 2015 Maxim Integrated Page 19
Table 4: ATE Connector Pin Descriptions
ATE
Connector Pin
Pin
Function TFP3 I/O Description
1
ATE Reset
Input
Active Low Reset to TFP3 Hardware
2
GND
⎯
Ground
3
ATE Progra m
Start
Input
Active High Signal Starts Target Flash Memory
Programming. A minimum of 500ms pulse is
required.
4
GND
⎯
Ground
5
ATE Progra m
Active
Output
Active High Signal Indicates Target Flash
Memory Programming in Progress. De-assert
ATE program start upon ATE Program Active
going high.
6
GND
⎯
Ground
7
ATE Pass
Output
ATE Pass Active High Signal Indicates Target
Flash Memory Programmed and verified
Target Microcontroller to be Correct. ATE Pass
goes low when ATE Program Start reasserted
high.
8
GND
⎯
Ground
9
ATE Fail
Output
ATE Fail Active High Signal Indicates Target
Flash Memory Failed Programming and
Verification of Target Microcontroller. ATE Fail
goes low when ATE Program Start is reasserted
high.
10
GND
⎯
Ground
3.4.1 Steps for ATE Programming
1. Connect external ATE hardware to the TFP3 ATE connector using a custom cable.
2. Power ON the external ATE hardware.
3. Connect the TFP3 to the DC adapter using a USB A-to-B cable. This step is required to power
on the TFP3 and DUT.
4. The status LED will toggle from red to green and the buzzer will sound five times (300ms
apart) to indicate that the TFP3 USB enumeration failed.
The TFP3 is now ready to perform ATE communication. The user can drive the ATE signals using any
external ATE equipment in a factory production environment.