12 i/O PORTS
12-10
Seiko epson Corporation
S1C63003/004/008/016 TeChniCal Manual
(Rev. 1.1)
• Reactivating from SLEEP status can only be done by generation of a key input interrupt factor. Therefore when
using the SLEEP function, it is necessary to set the interrupt select register (SIPxx = "1") of the port to be used for
releasing SLEEP status before executing the SLP instruction. Furthermore, enable the key input interrupt using the
corresponding interrupt mask register (EIKxx = "1") before executing the SLP instruction to run key input interrupt
handler routine after SLEEP status is released.
• Before the port function is configured, the circuit that uses the port (e.g. input interrupt, multiple key entry reset,
serial interface, R/F converter, event counter input, direct RUN/LAP input for stopwatch) must be disabled.