Motorola P8190 Service Manual download pdf (Page 136)

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P8190: Call Processor(U1000)

A38

Description

U1000 is a single-chip microcontroller that controls major functions of the cellular phone. U1000 will perform the functions of both the master controller and keyboard

processor. These functions include:

• Keypad interrupt and scanning

• Display driving

• Control of audio and RF hardware

• Call processing (signalling) software

- ON/OFF control

- EEPROM access

- Synthesizer programming

- Automatic Frequency Control(AFC)

- Transmit power setting

• User Interface

U1000 is not packaged with internal memories as past Call processors. This means that vital information that was previously stored in the memory of previous call pro-

cessors is now stored in the external EEPROM(U1003).

BLOCK DIAGRAM NOT NECESSARY

REFER TO PAGE B39