TCIC_R_ICSR
val = bus_space_read_1(iot, ioh, TCIC_R_ICSR);
while (bus_space_read_1(iot, ioh, TCIC_R_ICSR))
bus_space_write_1(iot, ioh, TCIC_R_ICSR, TCIC_ICSR_JAM);
icsr = tcic_read_1(h, TCIC_R_ICSR);