GMS81032 datasheet(88/101 Pages) HYNIX

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7.3 Low Voltage Detection Mode

7.3.1 Low voltage detection condition

An on board voltage comparator checks that VDD is at the required level to ensure

correct operation of the device. If VDD is below a certain level, Low voltage detector

forces the device into low voltage detection mode.

7.3.2 Low Voltage Detection Mode

There is no power consumption except stop current, stop mode release function is

disabled. All I/O port is configured as input mode and Data memory is retained until

voltage through external capacitor is worn out. In this mode, all port can be selected with

Pull-up resistor by Mask option. If there is no information on the Mask option sheet ,the

default pull up option (all port connect to pull-up resistor ) is selected.

7.3.3 Release of Low Voltage Detection Mode

Reset signal result from new battery(normally 3V) wakes the low voltage detection mode

and come into normal reset state. It depends on user whether to execute RAM clear

routine or not.

Chapter7. Reset Function

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

2.2

2.4

0¡É

10¡É

20¡É

30¡É

40¡É

50¡É

60¡É

70¡É

Temperature(¡É)

Low Voltage (V)

2.6

2.8

3.0

Fig 7.5 Low Voltage vs Temperature

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