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Nokia Hardware & Hardware Repair all what you need for Hardware Repairing for Nokia Phones. Before writing any thread here try to check the Frequently Asked Questions Section. |
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03-05-2001, 05:35 | #6 (permalink) |
Freak Poster Join Date: Jun 2000
Posts: 354
Member: 1623 Status: Offline Thanks Meter: 1 | MAD2 MAD2 contains following building blocks: ARM RISC processor with both 16bit instruction set (THUMB mode) and 32bit instruction set (ARM mode) TI Lead DSP core with peripherials: API (Arm Port Interface memory) for MCUDSP commu-nication, DSP code download, MCU interrupt handling vec-tors (in DSP RAM) and DSP booting Serial port (connection to PCM) Timer DSP memory BUSC (BusController for controlling accesses from ARM to API, Sys-tem Logic and MCU external memories, both 8 and 16bit memories) System Logic CTSI (Clock, Timing, Sleep and Interrupt control) MCUIF (Interface to ARM via BUSC). Contains MCU Boo-tROM DSPIF (Interface to DSP) MFI (Interface to COBBA AD/DA Converters) CODER (Block encoding/decoding and A51&A52 ciphering) AccIF(Accessory Interface) SCU (Synthesizer Control Unit for controlling 2 separate synthesizer) UIF (Keyboard interface, serial control interface for COBBA PCM Codec, LCD Driver and CCONT) SIMI (SimCard interface with enhanched features) PUP (Parallel IO, USART and PWM control unit for vibra and buzzer) The MAD2 operates from a 13 MHz system clock, which is generated from the 13Mhz VCXO frequency. The MAD2 supplies a 6,5MHz or a 13MHz internal clock for the MCU and system logic blocks and a 13MHz clock for the DSP, where it is multiplied to 52 MHz DSP clock. The system clock can be stopped for a system sleep mode by disabling the VCXO supply power from the CCONT regulator output. The CCONT provides a 32kHz sleep clock for internal use and to the MAD2, which is used for the sleep mode timing. The sleep clock is active when there is a battery volt-age available i.e. always when the battery is connected. |
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