Nokia RM-180 Service Manual

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 ~3.2V
The master reset threshold controls the internal reset of N2200 / (N2300). If battery voltage is above VMSTR,
N2300’s 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.
Power key
The system boots up when power key is pressed (adequate battery voltage, VBAT, present).
Power down can be initiated by pressing the power key again (the system is powered down with the aid of
SW). Power on key is connected to N2200 ASIC via PWRONX signal.
RM-180
System Module Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 9 –11
Copyright © 2006 Nokia. All rights reserved.

Nokia RM-180 Specifications

General

Brand	Nokia
Model	RM-180
Category	Cell Phone
Language	English