TMP92CF30
2009-06-12
92CF30-506
3.20.5 Operational description
(1)
Reading clock data
1. Using 1Hz interrupt
1Hz interrupt and the count up of internal data synchronize. Therefore, data
can read correctly if reading data after 1Hz interrupt occurred.
2. Using two times reading
There is a possibility of incorrect clock data reading when the internal counter
carries over. To ensure correct data reading, please read twice, as follows:
Figure 3.20.2 Flowchart of clock data read
Start
END
PAGER<PAGE>
=
“0” ,
Select PAGE0
Read the clock data
(1st)
Read the clock data
(2nd)
1st data
=
2nd data
NO
YES
Summary of Contents for TLCS-900/H1 Series
Page 652: ...TMP92CF30 2009 06 12 92CF30 650 ...