Panasonic G600 Technical Manual

Also see for EB-CR600: Service manual Service manual Service manual

Contents

http://cxema.ruSignal CPU I/O DescriptionLUA IExternal interrupt to the CPU. The voltage detector output goes LOW whenthe battery voltage drops below 3.6V. If the phone is on, this signal forcesthe PSU off and the interrupt initiates an emergency power down procedure.If the phone is off, a LOW on this signal will lock the PSU off. EXTINT canoverride all signals except EXT_PWRLOGIC_PWR O Signal generated by the CPU to hold the PSU on. Active highDC_OUT NC Chip select to the 3.0 and 3.4V regulators. Active lowSIM_PWR_CNT O Output from the CPU to enable the SIM 5.0V supply. Active high DEVnIGNITION I Vehicle ignition. When the vehicle ignition is on, this signal is LOW. This issensed by the CPU as an analogue voltage9.3 Power-upThe power-up procedure has two phases: There is an initial check to see if the battery is in good condition. Ifsuccessful, the second phase determines the source of the power-up request, key press, external power,accessory etc. and acts accordingly.The phone can be defined as powered-on whenever the linear regulators are active. It is not always obvious to theuser that the phone is powered-on as it may be in one of four modes.Sleep In this mode the CPU has been prevented from deactivating the linear regulators by EXT_PWR.There is no CPU activityCharge The CPU is alive but may only perform battery charging functions and monitor the power key.Restricted LEDs light, beeps, can charge battery etc. but it is not permitted to use the radio.Active The mobile is fully functional; LEDs light, beeps, search for network etc.9.3.1 Battery ConditionThe CPU must check the battery condition before deciding to power-up. The CPU can measure battery voltage andtemperature. If the temperature measurement is invalid, giving a ridiculous temperature reading; a non-standardbattery has been fitted, the battery is missing or the whole phone is operating far outside its specified temperaturerange. In any of these cases the phone must not power up. The CPU will regularly monitor the battery conditionwhile the phone is on.If EXT_PWR is present the regulators will be forced on and the CPU will not be able to deactivate them. If the CPUwants to power-down, all it can do is to enter sleep mode.Battery Voltage (V) Temp. reading EXT_PWR_SENSE ResultX (don’t care) invalid 0.5V Power-down (battery fault)X invalid 1.2V Sleep (battery fault)<4.0 X <0.5V Power-down (low battery)<4.0 valid 1.2V LOW>4.0 valid X OKIssue 1 Section 9 MCUK980101G8Revision 0 9 - 2 Technical GuidePOWER SUPPLIES