ambiq micro Apollo4 Blue Plus User manual
QUICK START GUIDE
Apollo4 Plus EVB
(EVB Revision 1.0)
Ultra-low Power Apollo SoC Family
Doc. ID: QS-A4P-1p0
Document Revision 1.0, May 2022
Apollo4 Plus EVB Quick Start Guide
QS-A4P-1p0 Page 2 2022 Ambiq Micro, Inc.
All rights reserved.
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Apollo4 Plus EVB Quick Start Guide
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All rights reserved.
Table of Content
Introduction ................................................................................................................. 6
Document Revision History......................................................................................... 6
Reference Documents and Software.......................................................................... 6
Quick Start .................................................................................................................. 6
Overview of the Apollo4 Plus EVB.............................................................................. 7
Debug Interface ........................................................................................................ 11
Software Development Tools.................................................................................... 13
Power Supply Options and Measuring Current......................................................... 14
Non-Power Solder Bridges ....................................................................................... 18
Ordering Information................................................................................................. 20
Apollo4 Plus EVB Quick Start Guide
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All rights reserved.
List of Figures
Apollo4 Plus EVB........................................................................................................ 7
Apollo4 Plus EVB - Major Top Side Components....................................................... 7
Apollo4 Plus EVB - Major Bottom Side Components.................................................. 8
Apollo4 Plus EVB - Top Side Parts Location .............................................................. 8
Apollo4 Plus EVB - Bottom Side Parts Location ......................................................... 9
Apollo4 Plus EVB Using On-board J-Link Debugger ................................................ 11
Apollo4 Plus EVB’s DEBUG IN Header (J13)........................................................... 12
Apollo4 Plus EVB Power Supplies Solder Bridge Connection.................................. 14
Apollo4 Plus EVB USB Power Sequencing Circuit ................................................... 15
Apollo4 Plus EVB VDD18/MIPI Power Sequencing Circuit ...................................... 15
Apollo4 Plus EVB Voltage Selection on Header J2 .................................................. 16
Apollo4 Plus EVB Voltage Selection on Header J3 .................................................. 16
Audio Jack J18 and AUDADC Audio Source Selections .......................................... 19
Audio Header J17 ..................................................................................................... 19
Apollo4 Plus EVB Quick Start Guide
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All rights reserved.
List of Tables
Document Revision History......................................................................................... 6
Peripherals Supporting Solder Bridge Connections.................................................. 18
EVB Ordering Information......................................................................................... 20
SoC Ordering Information......................................................................................... 20
Apollo4 Plus EVB Quick Start Guide
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All rights reserved.
1. Introduction
This document provides guidance in setting up the Apollo4 Plus Evaluation Board (EVB), revision 1, part
number AMAP4PEVB, to get started executing code examples, measuring power consumption in various
configurations, and beginning software development.
2. Document Revision History
3. Reference Documents and Software
The following items may be useful in understanding and using the EVB.
▪ EVB Schematic
▪ Apollo4 Plus Datasheet
▪ Apollo4 Plus Programmer’s Guide
▪ Apollo4 Plus Errata List
▪ AmbiqSuite SDK
4. Quick Start
The EVB Kit comes with the following items:
▪ Apollo4 Plus Evaluation Board (EVB)
▪ USB Type C cable
▪ Four adhesive-backed rubber feet
▪ Extra jumpers
Caution: The EVB has components loaded on the back of the board. Care should be taken to not damage
these components. The included rubber feet should be applied to the bottom of the board to prevent direct
contact between the components and a desk surface.
The EVB comes with jumpers pre-configured for default operation. Also, it has been pre-programmed with
the Binary Counter example program. To start EVB program execution, connect the USB-C cable from a
USB port on a PC to the J-Link USB connector (J6) on the EVB, and turn on the power switch (SW4). The
blue LED under the power switch should illuminate.
Monitor the three LEDs on the bottom of the EVB (D3-D5). The LEDs should light in a binary count-up
pattern, and repeat.
The AmbiqSuite SDK provides many example programs that may be run on the EVB. To run these
examples, download the SDK via the link provided above and select any of the pre-built examples in the
SDK at /boards/apollo4p_bga_evb/examples.
Rev # Date Description
1.0 May 2022 Initial release for Apollo4 Plus EVB, board version 1
Table 1: Document Revision History
Apollo4 Plus EVB Quick Start Guide
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5. Overview of the Apollo4 Plus EVB
The Apollo4 Plus EVB, features Arduino-compatible headers and an integrated J-Link debugger:
Figure 1. Apollo4 Plus EVB
Figure 2. Apollo4 Plus EVB - Major Top Side Components
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Figure 3. Apollo4 Plus EVB - Major Bottom Side Components
Figure 4. Apollo4 Plus EVB - Top Side Parts Location
Apollo4 Plus EVB Quick Start Guide
QS-A4P-1p0 Page 9 2022 Ambiq Micro, Inc.
All rights reserved.
Figure 5. Apollo4 Plus EVB - Bottom Side Parts Location
The EVB has these features:
▪ Apollo4 Plus SoC in the BGA package (AMAP42KP-KBR)
▪ Low power reference design
▪ Multiple power/clock options
▪ USB Type C connector for power/download/debug
▪ USB Type C connector for power/data to Apollo4 Plus
▪ Segger J-Link debugger
▪ Debugger-in port (J13) (SWD or ETM)
▪ Three user-controlled LEDs
▪ Two push buttons for application use, plus a reset push button
▪ Power slide switch with LED power indicator
▪ Five Arduino-style headers (J7, J9-J12) for pin/power access to a shield board
▪ Test points for power measurements
▪ High-speed connector (J8 - QSH-030-01-L-D-A) for interfacing to displays and/or high-speed memory
▪ Multiple solder-bridge options for power supply flexibility and peripheral access options
▪ 3.5 mm audio jack (SJ-435107) for evaluating low-power analog audio interface
▪ CE Mark and RoHS compliant
5.1 Secure Boot on the Apollo4 Plus SoC
Apollo4 Plus SoC parts from the Ambiq factory are preprogrammed with a Secure Bootloader and an
uninitialized Customer Info Space, referred to as INFO0. Initial provisioning of the part would include
programming a valid INFO0 and programming the main firmware image in the flash. The Apollo4 Plus EVB
is shipped with the INFO0 configuration pre-programmed with optimal settings for the EVB layout:
1. Default boot to non-secure mode
2. Enable Boot Override to Push Button on GPIO18 (OTP setting) - BTN0/SW1
3. Enable wired updates over UART0
A. UART0 is mapped to J-Link (OTP Setting).
B. Baud rate is 115200 bps, no-parity, 8-bit data length, no flow control.
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C. Timeout is 3 seconds.
For your reference, the following settings are programmed into INFO0 on the SoC resident on the EVB:
▪ Simo Buck is NOT enabled.
▪ Secure Bootloader (SBL) interface is configured to UART using GPIO47 and GPIO60, which allows
secure boot to be performed over the J-Link COM interface of the EVB.
▪ SBL override pin is configured to GPIO18 which is BTN0/SW1 on the EVB.
▪ All Flash and Debugger protection features are disabled.
For information on changing the INFO0 settings as well as using the Secure Bootloader, please refer to the
README.txt file, which can be found in the tools\apollo4b_scripts folder of the latest SDK release
supporting the Apollo4 family. This folder contains a number of python scripts to demonstrate generation of
INFO0 settings, customer main images, and the creation of images for the Wired Update protocol over
UART.
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