ST67W611M and STM32H7A3ZIT6 schematic + PCB review

[AuFries]

We are designing a benchtop device with an LCD, battery, and wireless capabilities and have chosen the STM32H7A3ZIT6 MCU and ST67W611M WiFi/BT SoC. It's intended to use TouchGFX for the graphics. The board is complete and ready to order but I'd like a review of the hardware and schematic beforehand if possible as re-ordering and re-assembly with a mistake would take a while.

 

MCU schematic:

Power Section of MCU

Signals of MCU

The schematic symbol was manually created with the nucleo hardware files as reference.

 

MCU PCB:

PCB routing for MCUThe yellow plane is a 3v3 digital power pour. USB is the differential signal coming from the top left of the MCU. Most of the signals are going to the LCD connector to the right. I have placed capacitors on pins as follows:

Pin	Label	Capacitor
6	VBAT	None, connected to 3v3d
30	VDD_5	4.7uF
32 & 33	VDDA & VREFP	Tied together. 100nF and 1uF
39, 52, 62, 72, 84, 108, 144	VDD_7, VDD_9, VDD_11, VDD_16, VDD_2, VDD_13	Separate. 100nF
71, 106	VCAP1 & VCAP2	Tied together. 2.2uF near each pin.
95	VDD33_USB_1	100nF and 1uF
131	VDD_26	100nF in parallel with 100nF

It is unclear to me exactly which of these are necessary. For example why pin 131 needs parallel 100nF capacitors as in the nucleo hardware.

 

Wireless schematic:

Wireless SoC Schematic

Wireless PCB:

Wireless SoC PCB routingST67W611M is placed on the top edge of the board such that the antenna is unobstructed. A ground pour is on layer 2 (not shown in images) underneath the entire board.

 

Thanks for any help

[KDJEM.1]

Hello @AuFries and welcome to the community;

 

I recommend you referring to Getting started with STM32H7A3/7B3 line and STM32H7B0 Value line microcontroller hardware development to check your PCB. This application note is intended for system designers developing applications based on STM32H7A3/7B3 line and STM32H7B0 Value line microcontrollers,  and provides an implementation overview of the following hardware features:
• Power supply
• Package selection
• Clock management
• Reset control
• Boot mode settings
• Debug management

Also, the Evaluation board (STM32H7B3I-EVAL) and Discovery kit (STM32H7B3I-DK) are proven designs and must be used as foundations for specific application development. 

I hope this help you.

Thank you.

Kaouthar