FLIP STATUS LINE

摘要

FLIP STATUS LINE Fault checking of slave devices. All the slave devices are polled periodically by a master control circuit and their response is noted. The master control circuit asserts a control signal for every other poll so as to cause the slave device to invert the bits in its response signal when the control signal is asserted. The non-inversion of the bits during the period of several polls is indicative of either a fault condition or a device not present condition.