參數(shù)資料
型號(hào)： R2043K
廠商： Ricoh Co., Ltd.
英文描述： 4-wire Serial Interface
中文描述： 4線串行接口
文件頁(yè)數(shù)： 46/48頁(yè)
文件大?。?/td> 458K
代理商： R2043K
R2043K/T
12345
Rev.2.06 - 46 -
O
Reading Time and Calendar Data
(1) Ordinary Process of Reading Time and Calendar Data
Read from Time Counter
and Calendar Counter
*2)
CE
←
L
CE
←
H
*1)
(2) Basic Process of Reading Time and Calendar Data with Periodic Interrupt Function
*2)
Other Interrupt
Processes
Set Periodic Interrupt
Cycle Selection Bits
CTFG=1
Yes
Read from Time Counter
and Calendar Counter
No
Control Register 2
←
(X1X1X011)
Generate Interrupt in CPU
*1)
*3)
*1) When writing to clock and calendar counters, do not insert Stop Condition
until all times from second to year have been written to prevent error in
writing time. (Detailed "P.24
O
Considerations in Reading and Writing
Time Data under special condition
".
*2) Take care so that process from Start Condition to Stop Condition will be
complete within 0.5sec. (Detailed in "P.24
O
Considerations in
Reading and Writing Time Data under special condition
".
*1) This step is intended to select the level mode as a
waveform mode for the periodic interrupt function.
*2) This step must be completed within 1.0 second.
*3) This step is intended to set the CTFG bit to 0 in the
Control Register 2 to cancel an interrupt to the CPU.
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