參數(shù)資料
型號: R2051K01
廠商: RICOH COMPANY LTD
元件分類: 時鐘/數(shù)據(jù)恢復及定時提取
英文描述: 0 TIMER(S), REAL TIME CLOCK, QCC12
封裝: 2 X 2 MM, 0.85 MM PITCH, ULTRA-COMPACT, FFP, 12 PIN
文件頁數(shù): 47/53頁
文件大?。?/td> 343K
代理商: R2051K01
R2051 Series
12345
Rev.1.04
- 51 -
l
Reading Time and Calendar Data
(1) Ordinary Process of Reading Time and Calendar Data
Read from Time Counter
and Calendar Counter
*2)
Start Condition
*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?
Read from Time Counter
and Calendar Counter
Yes
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 in "P.28 Data Transmission under
Special Condition".
*2) Take care so that process from Start Condition to Stop Condition will be
complete within 0.5sec.
(Detailed in "P.28 Data Transmission 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 0.5 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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