Siemens C45 User Manual

V1.0 Page 23 of 46 ICM MP CCQ ST
C45, M50 AND MT50 Company Confidential © Copyright Siemens AG 05/02
Overview of HW Structure
All power supply functions of the mobile phone, except the RF-Part, are carried out
by the power supply ASIC (D361)
General:
The pin POWER of the I/O-Connector is used for charging the battery.
For accessories, which provide a variable charging current, the current will
be set via a pin SB (current byte) (e.g. S25 chargers corresponding to
Car Kits etc.).
- The S45/ME45 power supply is unregulated and cannot be controlled by
the SB signal.
- The SB signal is used to distinguish between various chargers.
The following restrictions must be considered:
- The phone cannot be operated without battery.
- The phone will be damaged if the battery is inserted the wrong way
- In the charging branch a fuse element is inserted against over current.
5.2 Power Supply ASIC
The power supply ASIC (D361) contains the following functions:
- Control of “Switch On” of the mobile phone via the ON/OFF switch.
- Recognition of external chargers connected on POWER.
- Control of “Switch On” of the mobile phone via the ON/OFF1 (RTC)
- Watchdog monitoring
- Control of mobile phone “SWITCH OFF” via WATCHDOG_µP connection.
- “Switch off “of mobile phone in the case of overvoltage at battery connection.
- Generation of RESET signal for EGOLD+ and Flash
- Voltage generation via “Linear regulator 2.90 V “
- Voltage generation via “Linear regulator 2.65 V “
- Voltage generation via “Linear regulator 2.07 V “
- Battery charge support: interrupted if there is an over-temperature
- Software-controlled switching of voltage supply for the accessories
- Light switching
- Voltage generation for “SIM-CARD”
- VIBRA switching
- Ringer tone switching
- Audio switching
Switch “ON” sequence
- Falling edge recognition KB7, or RTC_INT
- Generation of the “2,07; 2,65; 2,9” voltages
- Generation of the “RESET_2,0V and RESET_2,65V”
- 32,768 KHz oscillator
- Generation of the “Watch Dog” signal through the EGOLD+
after “POWER_ON”
- 26MHz oscillator

Siemens C45 Specifications

General

Brand	Siemens
Model	C45
Category	Cell Phone
Language	English