[135] SPIM: No output from SPIM4

This anomaly applies to IC Rev. Rev 1, build codes CLAA-D00, QKAA-D00.

Domains

Application, Network

Symptoms

There is no output from SPIM4.

Conditions

CPU sleep is triggered after the SPIM4 is enabled but before it starts transmitting.

Consequences

SPIM4 is not functional.

Workaround

Before enabling SPIM4, perform the following step:

*(volatile uint32_t *)0x5000ac04 = 1;
After disabling SPIM4, perform the following step:

*(volatile uint32_t *)0x5000ac04 = 0;