Power Up And Reset - Nokia RH-9 Series Ccs Technical Documentation

CCS Technical Documentation
Charging cut-off limits (programmable)
Charging switch resistance
(includes bonding and leads)
Temp =65°C (ambient)
PWM frequency (std charger)
PWM duty cycle
Switch output current slew rate
Charging thermal shutdown threshold
VFLASH1 supply voltage input
Note: VCHAR is used as a supply voltage for charging control parts

Power Up and Reset

Power up and reset is controlled by the UEM ASIC. RH-9 baseband can be powered up in
following ways:
1 Press power button, which means grounding the PWRONX pin of the UEM
Connect the charger to the charger input
2
Supply battery voltage to the battery pin
3
RTC Alarm, the RTC has been programmed to give an alarm
4
After receiving one of the above signals, the UEM counts a 20ms delay and then enters
it's reset mode. The watchdog starts up, and if the battery voltage is greater than Vcoff+
a 200ms delay is started to allow references etc. to settle. After this delay elapses the
VFLASH1 regulator is enabled. 500us later VR3, VANA, VIO and VCORE are enabled.
Finally the PURX line is held low for 20 ms. This reset, PURX, is fed to the baseband ASIC
UPP, resets are generated for the DSP and the MCU. During this reset phase the UEM
forces the VCXO regulator on regardless of the status of the sleep control input signal to
the UEM. All baseband regulators are switched on at the UEM power on except for the
SIM regulator that is controlled by the MCU. The UEM internal watchdog is running dur-
ing the UEM reset state, with the longest watchdog time selected. If the watchdog
expires the UEM returns to power off state. The UEM watchdog is internally acknowl-
edged at the rising edge of the PURX signal in order to always give the same watchdog
response time to the MCU.
Power up with PWR key
When the Power on key is pressed the UEM enters the power up sequence as described in
Issue 1 11/02
VBATLim 3.54
1+
3.32
VBATLim1-
4.85
VBATLim2L+
VBATLim2L-
4.65
VBATLim2H+
5.10
VBATLim2H-
4.90
R -
SW
0.5
0
SR 0.4
TjsdC+ 140
TjsdC- 120
VFLASH1 2.7
ãNokia Corporation
System Module & UI
3.65 3.76 V
3.50 3.66
5.0 5.15
4.85 5.05
5.25 5.40
5.10 5.30
- 0.3 W
1 1.5 Hz
- 100 %
0.6 0.8 A/ms
150 160
°C
130 140
2.78 2.88 V
RH-9
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