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RV5C338A-E2 Datasheet

  • RV5C338A-E2

  • 3-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MON...

  • 52頁

  • RICOH

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R
脳
5C338A
Good Example
Time span of 31碌s or more
CE
SIO
F4h
Data
Data
Reading from
the second
counter at
address 0h
Data
Reading from
the minute
counter at
address 1h
Data
Reading from
the hour counter
at address 2h
Any address other than addresses 0h to 6h
permits of immediate reading or writing
without requiring a time span of 31碌s.
Specifying Fh in the Reading from the
address pointer
control register 2
Writing 4h to the
at address Fh
transfer format register
Bad Example (1) (Where the CE pin is once driven low in the process of reading time data)
Time span of
31碌s or more
CE
SIO
0Ch
Specifying 0h in the
address pointer
Writing Ch in the
transfer format register
Data
Reading from
the second
counter
at address 0h
14h
Specifying 1h in the
address pointer
Writing 4h in the
transfer format register
Data
Reading from
the minute
counter
at address 1h
Data
Reading from
the hour counter
at address 2h
Time span of
31碌s or more
Bad Example (2) (Where a time span of less than 31碌s is left until the start of the process of writing time data)
Time span of less than 31碌s
CE
SIO
F0h
Data
Data
Writing to the
second counter
at address 0h
Data
Writing to the
minute counter
at address 1h
Data
Writing to the
hour counter
at address 2h
Specifying Fh in the Writing to the
address pointer
control register 2
Writing 0h to the
at address Fh
transfer format register
Bad Example (3) (Where a time span of less than 61碌s is left between the adjacent processes of reading time data)
Time span of
less than 61碌s
CE
SIO
0Ch
Data
0Ch
Data
Specifying 0h in the Reading from the
second counter
address pointer
at address 0h
Writing Ch to the
transfer format register
0Ch
Specifying 0h in the Reading from the
address pointer
second counter
Writing Ch to the
at address 0h
transfer format register
Data
Data transfer from the host
Data transfer from the real-time clocks
26

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