RX5C348A Datasheet, PDF (45/45 Pages) RICOH electronics devices division – 4-WIRE SERIAL INTERFACE

Interrupt Process
(1) Periodic Interrupt
Set Periodic Interrupt _*1)
Cycle Selection Bits
Generate Interrupt to CPU
CTFG=1?
No
Yes
Conduct
Periodic Interrupt
*2)
Control Register 2←
(X1X1X011)
Other Interrupt
Processes
Rx5C348A/B
*1) This step is intended to select the level mode as a
waveform mode for the periodic interrupt function.
*2) This step is intended to set the CTFG bit to 0 in
the Control Register 2 to cancel an interrupt to the
CPU.
(2) Alarm Interrupt
WALE or DALE←0 _*1)
Set Alarm Min., Hr., and
Day-of-week Registers
WALE or DALE←1 ^*2)
Generate Interrupt to CPU
*1) This step is intended to once disable the alarm
interrupt circuit by setting the WALE or DALE bits to 0
in anticipation of the coincidental occurrence of a
match between current time and preset alarm time in
the process of setting the alarm interrupt function.
*2) This step is intended to enable the alarm interrupt
function after completion of all alarm interrupt
settings.
*3) This step is intended to once cancel the alarm
interrupt function by writing the settings of "X,1,X,
1,X,1,0,1" and "X,1,X,1,X,1,1,0" to the Alarm_W
Registers and the Alarm_D Registers, respectively.
WAFG or DAFG=1?
Yes
Conduct Alarm Interrupt
No _{Other Interrupt}
Processes
*3)
Control Register 2 ←
(X1X1X101)
Rev.2.01
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