LG GS205, Руководство по обслуживанию

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controlling VCXO or crystal, thus reducing the need for expensive TCVCXO. MT6226M
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 debugging interface, the MT6226M provides developers with a
wide set of options in choosing ARM development kits from different third party vendors.
Power Management
The MT6226M 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, MT6226M is also fabricated in
advanced low leakage CMOS process, hence providing an overall ultra low leakage solution.
Package
The MT6226M device is offered in a 13mm×13mm, 294-ball, 0.65 mm pitch, TFBGA
package.
3.1.2 Platform Features
General
Integrated voice-band, audio-band and base-band analog front ends
TFBGA 13mm×13mm, 294-ball, 0.65 mm pitch package
MCU Subsystem
ARM7EJ-S 32-bit RISC processor
High performance multi-layer AMBA bus
Java hardware acceleration for fast Java-based games and applets
Operating frequency: 26/52 MHz
Dedicated DMA bus
14 DMA channels
284K Bytes zero-wait-state on-chip SRAM
On-chip boot ROM for Factory Flash Programming
Watchdog timer for system crash recovery
2 sets of General Purpose Timer
Circuit Switch Data coprocessor
Division coprocessor
External Memory Interface
Supports up to 8 external devices
Supports 8-bit or 16-bit memory components with maximum size of up to 64M Bytes each
Supports Flash and SRAM with Page Mode or Burst Mode
Supports Pseudo SRAM
Industry standard Parallel LCD Interface
Supports multi-media companion chips with 8/16 bits data width
Flexible I/O voltage of 1.8V ~ 2.8V for memory interface
Configurable driving strength for memory interface
User Interfaces
6-row × 7-column keypad controller with hardware scanner
Supports multiple key presses for gaming