Voltage limits

Parameter

Description

Value

VMSTR

Master reset threshold (N2200)

2.2V (typ.)

VMSTR+

Threshold for charging, rising (N2300)

2.1V (typ.)

VMSTR-

Threshold for charging, falling (N2300)

1.9V (typ.)

VCOFF+

Hardware cutoff (rising)

2.9V (typ.)

VCOFF-

Hardware cutoff (falling)

2.6V (typ.)

SWCOFF

SW cutoff limit

~3.25V

The master reset threshold controls the internal reset of EM ASICs. If battery voltage is above VMSTR, N2300 charging control logic is alive. Also, RTC is active and supplied from the main battery. Above VMSTR, N2300 allows the system to be powered on although this may not succeed due to voltage drops during start up. SW can also consider battery voltage too low for operation and power down the system.

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