MT6225A Просмотр технического описания (PDF) - MediaTek Inc

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MT6225A

GSM/GPRS Baseband Processor

MediaTek Inc 

MT6225 GSM/GPRS Baseband Processor Data Sheet Revision 1.00

Radio Interface

MT6225 integrates a mixed-signal Baseband front-end in

order to provide a well-organized radio interface with

flexibility for efficient customization. It contains gain and

offset calibration mechanisms, and filters with

programmable coefficients for comprehensive

compatibility control on RF modules. This approach also

allows the usage of a high resolution D/A Converter for

controlling VCXO or crystal, thus reducing the need for

expensive TCVCXO. MT6225 achieves great MODEM

performance by utilizing 14-bit high resolution A/D

Converter in the RF downlink path. Furthermore, to reduce

the need for extra external current-driving component, the

driving strength of some BPI outputs is designed to be

configurable.

Debug Function

The JTAG interface enables in-circuit debugging of

software program with the ARM7EJ-S core. With this

standardized debugger interface, the MT6225 provides

developers with a wide set of options for choosing ARM

development kits from supports of thirty parties. For

security reason, JTAG interface can be disabled by

programming internal OTP (one-time programmable) fuse.

Power Management

The MT6225 offers various low-power features to help

reduce system power consumption. These features include

Pause Mode of 32KHz clocking at Standby State, Power

Down Mode for individual peripherals, and Processor

Sleep Mode. In addition, MT6225 is also fabricated in

advanced low leakage CMOS process, hence providing an

overall ultra low leakage solution.

Package

The MT6225 device is offered in a 12mm×12mm, 264-ball,

0.65 mm pitch, TFBGA package.

7/377

MediaTek Inc. Confidential

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