Echelon Series 6000 Chip databook - Manual (Page 123)

• Events on the I/O pins for the input timer/counter functions are accurately measured,
and a value returned to a register, regardless of the state of the application or
interrupt processor within the Neuron Chip or Smart Transceiver. However, the
application processor can be delayed in reading the register.
Series 6000 Chip Data Book 111