Power Up And Reset - Nokia 7088 Troubleshooting Manual

7088 (Flower)
Base band Description and Troubleshooting

Power Up and Reset

The PM6610 ASIC controls the power up and reset. The base band (MSM) can be
powered up in the following ways:
Pressing the Power button, which means to ground the KPADPWR_N pin
of the PM ("PHONE_ON" net in schematic).
Connecting the charger to the charger input.
After receiving one of the above signals, the PM will start to enter reset mode. The
watchdog starts, and if the battery voltage is greater than its threshold, (3V), a 6ms
delay starts to allow MSM to settle. After this delay elapses, the VERG_MSMC
Page 6 © 2006 Nokia Corporation
Figure 2: Power Distribution
Company Confidential Issue 1 12/2006