參數(shù)資料
型號(hào)： R2025D
廠(chǎng)商： RICOH COMPANY LTD
元件分類(lèi)： 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(yè)數(shù)： 14/47頁(yè)
文件大?。?/td> 524K
代理商： R2025D
R2025S/D
(5) /CLEN1
14
32-kHz Clock Output Bit 1
/CLEN1
Description
0
1
Enabling the 32-kHz clock output
Disabling the 32-kHz clock output
(Default)
Setting the /CLEN1 bit or the /CLEN2 bit (D4 in the control register 1) to 0 specifies generating clock pulses
with the oscillation frequency of the 32.768-kHz crystal oscillator for output from the 32KOUT pin.
Conversely, setting both the /CLEN1 and the /CLEN2 bit to 1 specifies disabling (“L”) such output.
(6) CTFG
Periodic Interrupt Flag Bit
CTFG
0
Periodic interrupt output = “H”
1
Periodic interrupt output = “L”
The CTFG bit is set to 1 when the periodic interrupt signals are output from the /INTRA pin (“L”). The
CTFG bit accepts only the writing of 0 in the level mode, which disables (“H”) the /INTRA pin until it is
enabled (“L”) again in the next interrupt cycle. Conversely, setting the CTFG bit to 1 causes no event.
(7) WAFG,DAFG
Alarm_W Flag Bit and Alarm_D Flag Bit
WAFG,DAFG
0
Indicating a mismatch between current time and preset alarm time
1
Indicating a match between current time and preset alarm time
The WAFG and DAFG bits are valid only when the WALE and DALE have the setting of 1, which is caused
approximately 61
μ
s after any match between current time and preset alarm time specified by the Alarm_W
registers and the Alarm_D registers. The WAFG (DAFG) bit accepts only the writing of 0. /INTRB
(/INTRA) pin outputs off (“H”) when this bit is set to 0. And /INTRB (/INTRA) pin outputs “L” again at the
next preset alarm time. Conversely, setting the WAFG and DAFG bits to 1 causes no event. The WAFG
and DAFG bits will have the reading of 0 when the alarm interrupt circuit is disabled with the WALE and
DALE bits set to 0. The settings of the WAFG (DAFG) bit is synchronized with the output of the
/INTRB (/INTRA) pin as shown in the timing chart below.
Approx. 61
μ
s
Description
(Default)
Description
(Default)
/INTRB(/INTRA) Pin
Writing of 0 to
WAFG(DAFG) bit
WAFG(DAFG) Bit
(Match between
current time and
preset alarm time)
Approx. 61
μ
s
Writing of 0 to
WAFG(DAFG) bit
(Match between
current time and
preset alarm time)
(Match between
current time and
preset alarm time)
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參數(shù)描述
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