User Guide

Table 22 Charging interface connections

Pin Signal I/O Engine connection Notes

1 Vchar In N2300 VCharIn1, 2 Charging

voltage /

charger

detection,

Center pin

2 Charge GND Ground Charger

ground

Table 23 Charging IF electrical characteristics

Description Parameter Min Max Unit Notes

Vchar V Charge 0 20 V Center pin

Vchar I Charge 0.85 A Center pin

Charge GND 0.85 A

Threshold for

charging,

rising (N2300)

MSTR+

2.1 V Typical value

Threshold for

charging,

falling (N2300)

MSTR-

1.9 V Typical value

Battery interface

The battery interface supports a 3-pole battery interface. The interface consists of three connectors: VBAT,

BSI and GND.

The BSI line is used to recognize the battery capacity by a battery internal pull down resistor.

Figure 82 Battery pin order

Table 24 Battery interface connections

Pin Signal I/O Engine connection Notes

1 VBAT -> EM ASIC N2200 VBAT Battery voltage

2 GND -> GND GND Ground

RM-208

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