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EPSON
S1C63358 TECHNICAL MANUAL
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Clock Timer)
4.9.5 Programming notes
(1) Be sure to read timer data in the order of low-order data (TM0–TM3) then high-order data (TM4–
TM7).
(2) After an interrupt occurs, the same interrupt will occur again if the interrupt enabled state (I flag =
"1") is set or the RETI instruction is executed unless the interrupt factor flag is reset. Therefore, be sure
to reset (write "1" to) the interrupt factor flag in the interrupt service routine before shifting to the
interrupt enabled state.
(3) When the CR oscillation circuit is selected as the OSC1 oscillation circuit by mask option, the frequen-
cies and times differ from the values described in this section because the oscillation frequency will be
60 kHz (Typ.). Therefore, the clock timer can not be used for the clock function.
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