rs5c62 RICOH Co.,Ltd., rs5c62 Datasheet - Page 44

• Manufacturer Part Number: rs5c62
• Description: Real-time Clock
• Manufacturer: RICOH Co.,Ltd.

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RP/RF/RS5C62
Category
Answer 5: It is not recommendable to configure a power switch-
Answer 6: The TSTA and TSTB bits are intended for IC selection and not for general users. (These test
Answer 7: The possible causes of such changes include :
Answer 8: Range of operating voltage of crystal oscillators only for time count operation: 2.0V to 6.0V.
Question 6 : To what test modes can the TSTA and TSTB bits be applied as test bits?
Question 5 : Is it possible to configure a power switching circuit containing a diode?
Question 7 : What are the possible causes of any changes which may occur to internal time data?
Question 8 : What are the ranges of operating voltages?
ing circuit containing a diode, which causes a voltage
drop as shown in the right circuit diagram (where
“D
ratings of the input and output pins range from –0.3V
to the V
bits should be kept at “1” in normal operation and will automatically be set to “1” upon driving
low the CE pin.)
1. Occurrence of writing errors due to such factors as noises caused below the operating volt-
2. Occurrence of instantaneous power disconnection, and
3. Writing to other addresses than are allocated originally due to shortage of addressing time
Range of operating voltage having any access to the CPU : 2.7V to 6.0V
Incidentally, AC timing is available in three ratings : 3V±10%, 5V±10%, and 5V±20%.
1
age of the CPU at the time of switching from the power supply to the backup battery,
(
To cope with the cause 1. , see “2. Handling of CE Pin” in “USAGE”. To solve the cause 2. ,
check the power supply system to prevent instantaneous power disconnection from occur-
ring. To overcome the cause 3. , secure sufficient addressing time (
” represents a diode). (The maximum absolute
t
AS
).
DD
plus 0.3V.)
Questions and Answers
RP/RF/RS5C62
VDD
t
AS
).
D
1
System
power
supply