RS5C348A RICOH Co.,Ltd., RS5C348A Datasheet - Page 45

• Manufacturer Part Number: RS5C348A
• Description: 4-wire Serial Interface Real-time Clock
• Manufacturer: RICOH Co.,Ltd.

Rev.2.01
(1) Periodic Interrupt
(2) Alarm Interrupt
Interrupt Process
Generate Interrupt to CPU
Generate Interrupt to CPU
Set Alarm Min., Hr., and
Conduct Alarm Interrupt
Day-of-week Registers
Set Periodic Interrupt
Control Register 2←
Cycle Selection Bits
Control Register 2 ←
WALE or DALE←0
WALE or DALE←1
Periodic Interrupt
WAFG or DAFG=1?
(X1X1X011)
(X1X1X101)
CTFG=1?
Conduct
Yes
Yes
*2)
*3)
*1)
*2)
*1)
No
No
Other Interrupt
Other Interrupt
Processes
Processes
*1) This step is intended to once disable the alarm
*2) This step is intended to enable the alarm interrupt
*3) This step is intended to once cancel the alarm
*1) This step is intended to select the level mode as a
*2) This step is intended to set the CTFG bit to 0 in
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.
function after completion of all alarm interrupt
settings.
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.
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waveform mode for the periodic interrupt function.
the Control Register 2 to cancel an interrupt to the
CPU.
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Rx5C348A/B