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參數(shù)資料
| 型號(hào)： | R2025D |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | XO, clock |
| 英文描述： | High precision I2C-Bus Real-Time Clock Module |
| 中文描述： | REAL TIME CLOCK, DSO20 |
| 封裝： | 6.10 X 5 MM, 1.30 MM HEIGHT, SON-22/20 |
| 文件頁數(shù)： | 43/47頁 |
| 文件大?。?/td> | 524K |
| 代理商： | R2025D |
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R2025S/D
43
Reading Time and Calendar Data
(1) Ordinary Process of Reading Time and Calendar Data
Read from Time Counter
and Calendar Counter
*2)
Stop Condition
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
Yes
Read from Time Counter
and Calendar Counter
No
Control Register 2
←
(X1X1X011)
Generate Interrupt in CPU
*1)
*3)
*1) When reading 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.27 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.27 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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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
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