RT5C348B(2003) Просмотр технического описания (PDF) - RICOH Co.,Ltd.

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RT5C348B
(Rev.:2003)

4-wire Serial Interface

RICOH Co.,Ltd. 

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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