This anomaly applies to IC Rev. Engineering C, build codes CKAA-CA0, QIAA-CA0.
The double buffering of the ISO EPs of the USBD is not functional.
Always. With default settings, the buffers overlap.
During ISO transition, received or transmitted data is likely to be corrupted.
*((volatile uint32_t *)(NRF_USBD_BASE + 0x800)) = 0x7E3;
*((volatile uint32_t *)(NRF_USBD_BASE + 0x804)) = 0x40;