The following rules must be observed when accessing the module registers:
A read from the HDQ_INT_STATUS register or the HDQ_RX_DATA register is not allowed unless the processor has been interrupted by the module.
After the release of the GO bit in the HDQ_CTRL_STATUS register, no access to the HDQ_TX_DATA or HDQ_CTRL_STATUS register is allowed until the processor has been interrupted by the module.
Polling of the HDQ_INT_STATUS register by software to determine whether an interrupt was generated is not allowed.
CAUTION:
The HDQ1W registers are limited to 32-bit data accesses; 16-bit and 8-bit data accesses are not allowed and can corrupt register content.