Epson S1C6200A Dokumentacja Strona 125

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S1C62740 TECHNICAL HARDWARE EPSON I-113
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Interrupt and HALT/SLEEP)
Programming notes
(1) When it shifts to the SLEEP status, you must invariably set the
K10 interrupt to enable.
(2) When shifting to the SLEEP status, the CPU clock must be set
to OSC1 and the OSC3 oscillation circuit must be off.
(3) The interrupt factor flags are set when the timing condition is
established, even if the interrupt mask registers are set to "0".
(4) Write the interrupt mask register only in the DI status (inter-
rupt flag = "0"). Writing during EI status (interrupt flag = "1")
will cause malfunction.
(5) Reading of interrupt factor flags is available at EI, but be careful
in the following cases.
If the interrupt mask register value corresponding to the inter-
rupt factor flags to be read is set to "1", an interrupt request will
be generated by the interrupt factor flags set timing, or an
interrupt request will not be generated. Be very careful when
interrupt factor flags are in the same address.
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