17.1.2. The Meaning of the Motion of Pin 128
• • • • The period of Host Power Up (Hardware Initialization)
In this period, the host sets up some registers in order to wake up the system.
• • • • The period of Host Reset (Software Initialization)
In this period, the host reads the parameter from the memory and initializes module.
17.2. Flash Memory (IC701)
Following information data is stored.
• • • • Telephone number, etc.
ex: Telephone Directory number, Caller ID data, ID code
• • • • Settings
ex: message numbers, caller ID numbers, pulse tone dial
17.3. Power Supply Circuit
Function:
The power supply voltage from AC adaptor is converted to the desired voltage of each block.
Circuit Operation:
• • • • IC301, Q301 and D303: 4.0V DCDC Converter
• • • • IC300: 3.3V Regulator
• • • • IC601: 2.5V Regulator
65
KX-TG2338BXS / KX-TGA236BXS