¡ Semiconductor
MSM81C55-5RS/GS/JS
(6) Standby Mode (see page 7)
The MSM81C55-5 is placed in standby mode when the high level at the CE input is latched
duringthenegativegoingedgeofALE. Allinputportsandthetimerinputshouldbepulled
up or down to either V or GND potential.
CC
When using battery back-up, all ports should be set low or in input port mode. The timer
output should be set low. Otherwise, a buffer should be added to the timer output and the
battery should be connected to the power supply pins of the buffer.
By setting the reset input to a high level, the standby mode can be selected. In this case, the
command register is reset, so the ports automatically set to the input mode and the timer
stops.
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