Toshiba TLCS-900/L1 Series Manual page 212

TMP91C824
2. Disabling the Clock
Carry of a clock is prohibited when write "0" to PAGER<ENATMR> and can
prevent malfunction by 1s carry hold circuit. During a clock prohibited, 1s carry
hold circuit holds one second carry signal, which is generated from divider. After
becoming clock enable state, output the carry signal to clock and revise time and
continue operation. However, clock is late when clock-disabling state continues
for one second or more.
Start
Disable the clock
Write the clock data
Enable the clock
End
Figure 3.13.5 Flowchart of Clock Disable
91C824-210 2008-02-20