receiving, over a bus, a first request for data, the first request comprising an error, wherein a first signal of a first type comprising invalid data and a first signal of a second type both result on the bus based at least in part on the first request comprising the error, the first signal of the second type indicating that the bus is in an idle state;

receiving, over the bus, a second request for the data based at least in part on the first signal of the second type resulting on the bus; and

transmitting, over the bus based at least in part on successfully receiving the second request, a second signal of the first type comprising the data and a second signal of the second type comprising an indication that the bus is in an active state.