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
文件頁數(shù)： 45/48頁
文件大?。?/td> 458K
代理商： R2043K
R2043K/T
Q
Typical Software-based Operations
O
Initialization at Power-on
12345
Rev.2.05 - 45 -
Start
*1)
Yes
No
VDET=0
Warning Back-up
Battery Run-down
Set Oscillation Adjustment
Register and Control
Register 1 and 2, etc.
Power-on
*2)
*4)
*3)
PON=1
Yes
No
*1)
After power-on from 0 volt, the start of oscillation and the process of internal initialization require a
time span on 1to 2seconds, so that access should be done after the lapse of this time span or more.
The PON bit setting of 0 in the Control Register 1 indicates power-on from backup battery and not
from 0v. For further details, see "P.34
O
PON, /XST, and VDET".
This step is not required when the supply voltage monitoring circuit is not used.
This step involves ordinary initialization including the Oscillation Adjustment Register and interrupt
cycle settings, etc.
*2)
*3)
*4)
O
Writing of Time and Calendar Data
Write to Time Counter and
Calendar Counter
*2)
CE
←
L
*3)
CE
←
H
*1)
*1) When writing to clock and calendar counters, do not drive CE to “L” until
all times from second to year have been written to prevent error in writing
time. (Detailed in "P.24
O
Considerations in Reading and Writing
Time Data under special condition
".
*2) Any writing to the second counter will reset divider units lower than the
second digits.
*3) Take care so that process from CE driving to “H” to driving to “L” will be
complete within 1.0sec. (Detailed in "P.24
O
Adjustment of Oscillation
frequency
".
The R2043K/T may also be initialized not at power-on but in the process
of writing time and calendar data.
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