There is no more SSI hardware module in RP2350, it was replaced by QMI.
RP2040 has a Synchronous Serial Interface (SSI) controller which appears on the QSPI pins and is used to
communicate with external Flash devices.
pico_unique_id might be related.12.14. QSPI Memory Interface (QMI)
12.14.1. Overview
The QSPI memory interface (QMI) provides read/write memory-mapped access to two external QSPI memory devices.
RP2350 has a single QMI instance, embedded in the XIP subsystem (Section 4.4), which replaces the SSI interface
present on RP2040. The QMI supports serial-SPI, dual-SPI, and quad-SPI transfers, with two chip selects and shared
clock/data signals.
Statistics: Posted by gmx — Fri Apr 25, 2025 1:07 am