[PSX SCPH-1001 PU-8 HW2 Internal Boot issue]

[rutdarkronin]

Answers checklist.

• I have read and will follow the terms above.
• I have read the documentation BlueRetro wiki and the issue is not addressed there.
• I have updated my BlueRetro to latest version available.
• I have searched the issue tracker for a similar issue and not found a similar issue.

BlueRetro firmware version

24.10 <-> 25.04

BlueRetro firmware specification

HW2

BlueRetro firmware variant

System specific

BlueRetro hardware type

Internal install DIY

Manufacturer

ESP-32-WROOM

System used

Sony PlayStation 1

Bluetooth controller brand & name

DualSense

What is the problem? (only list ONE problem per report)

Hello and thank you for your precious time!
Issue is the following. Upon internal installation I have cut system reset button trace and solder it ends to IO0 and IO14 accordingly.
When powering on, BlueRetro is stuck at boot mode - no pairing, no reset button functions, nothing. However, If I reset ESP32 itself with it's own RST button while system is powered on - it boots just fine and reset button has it's proper functionality. Pairing works too, no issues.
The main issue here is that IO0 at system reset is held low at system powerup for a couple of milliseconds which is enough for ESP32 to jump into boot mode. Could this somehow be addressed?

What did you expect to happen?

BlueRetro should boot normally on cold system startup.

Attach BlueRetro debug trace here

No response

[darthcloud]

The best would be to keep the ESP32 EN line low until that line is stabelized. There already an RC circuit on that pin, but you could modify the cap/res value to increate the delay. Or you could use a simple PMIC IC that hold the reset low for X ms.

[rutdarkronin]

Thank you.
By using pmic did you mean hold EN line low for awhile? It's already bridged with 10k pullup to 3.3 line, however removing bridge seems not affecting anything.
Edit: you mean esp32 reset, that makes sense, thanks again!

[darthcloud]

Yes, I used PMIC Supervisors DS1233A-10+T&RCT-ND for that in the past.