User Guide

PAMS Technical Documentation Disassembly and Troubleshooting

TME-3

Issue 3 10/03 Nokia Corporation. Page 41

7, 8, 9 mC resets the WATCHDOG (

Twr < Toff

)

10. mC switches Power Off by letting watchdog elapse, (

Twr > Toff

). PURX low, regula-

tors disabled.

11. Power switched on via

power switch

(low level),

VBATT > V

COFF+

DELAY1 starts.

12. DELAY1 elapsed:, Enable regulator reference buffers, time delay DELAY2 starts

13. DELAY2 elapses: Enable VFLASH1 regulator. DELAY3 starts.

14. DELAY3 elapses: ENABLE VIO, VCORE, VANA and VR3 regulators. DELAY4 starts.

15. DELAY4 elapses: Release PURX. UEM in ACTIVE mode. RF regulators can be

enabled through register writing.

16,17. VBAT drops below reset level for a

short period (<5

. Stay in ACTIVE.

18. VBAT drops below V

COFF-

when battery discharges =>PURX low, disable regulators

=>PWR_OFF

19. VBAT drops below V

MSTR-

=> NO_SUPPLY or BACK_UP mode

Flash 1 signal

Figure 38: Flash 1 signal

CH1 = BSI

CH2 = MBUS

CH3 = FBUSTX

CH4 = FBUSRX

Measure points

Production test pattern

(J396)

FLASH_1