參數(shù)資料
型號(hào)： RS5C372A
廠商： RICOH COMPANY LTD
元件分類(lèi)： XO, clock
英文描述： I2C bus SERIAL INTERFACE REAL-TIME CLOCK ICs
中文描述： 0 TIMER(S), REAL TIME CLOCK, PDSO8
封裝： SSOP-8
文件頁(yè)數(shù)： 55/59頁(yè)
文件大?。?/td> 442K
代理商： RS5C372A
RS5C372A/B
51
7. Typical Software-based Operations
7.1 Initialization upon Power-on
Start
XSTP=1
Power-on
NO
YES
Control register2
←
(00
××××××
)
Set clock and calendar
counters and interrupt cycles
ACK not returned or
Read Data is FFh
*
3
*
1
*
4
*
5
*
2
*
1) Start access after waiting one to two seconds that are required for starting up of oscillation and internal initialization after power on from 0V.
*
2) If access is tried during IC internal initialization period described in
1, acknowledge signal may not be output, it is output only at first, or values read may
FFh. If any of these occurs, repeat accessing. This will be required also for ordinary routines when accessing may require 0.5 seconds or more.
*
3) When XSTP=0 in oscillation halt sensing, it indicates power has not been booted from 0V but from back up supply.
*
4) The XSTP shall be set to 0 by setting any data to the control register 2.
*
5) Perform ordinary initial setting including clock calendar or interrupt cycle.
7.2 Write Operation to Clock and Calendar Counters
Stop condition
Start condition
Write to clock and
calendar counters
*
1
*
2
*
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.
*
2) Take care so that process from start condition to stop condi-
tion will be completed within 0.5 seconds. (The RS5C372A/B
force access to the CPU to terminate within 0.5 to 1.0 sec-
onds after start condition has occurred in case the CPU is
failed during access.)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
RS5C372B 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:I2C-bus Serial Interface Real Time Clock (8pin SSOP)
RS5C372B-E1 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:I2C-bus Serial Interface Real Time Clock (8pin SSOP)
RS5C372B-E2 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:I2C-bus Serial Interface Real Time Clock (8pin SSOP)
RS5C373A 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Real-Time Clock
RS5C4FC 制造商:Dialight 功能描述:
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