Motorola Confidential Proprietary
TDMA T2290/T2297
General Description
70
GCAP II
•
2.775V low current reference (REF)
•
Two BUCK/BOOST switching regulators
Switcher # 1 not used
Switcher # 2 BUCK mode 3.3V
•
Charge Pump Output
•
High End PA Regulator
•
Differential Speaker (earpiece) amplifier
•
Single ended Alert amplifier
•
Single ended Auxiliary amplifier
•
Turn on control signals to activate the
radio
•
Turn off control signals to turn off the
radio if an error is detected
•
Battery Charger
•
SPI interface
•
10 channel 8 bit A/D
•
8 bit D/A
•
Microphone amplifiers
•
DSC bus buffers
•
Audio CODEC with serial interface
•
SPI interface
Содержание T2290
Страница 1: ...DIGITAL WIRELESS TELEPHONE Service Manual Level 3 Release 1 TDMA T2290 T2297 ...
Страница 26: ... 2000 Motorola Inc TDMA T2290 T2297 Cellular Overview 16 ...
Страница 40: ...Motorola Confidential Proprietary TDMA T2290 T2297 TDMA Test Mode NAM Programming 30 ...
Страница 68: ...Disassembly TDMA T2290 T2297 Keypad Removal Motorola Confidential Proprietary 58 ...