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MB86342B

Dolby Digital (AC-3) Decoder LSI

Fujitsu 

MB86342B

s FUNCTION OF EACH BLOCK

MCORE : MUCAP Core

MUCAP Core is a 20-bit fixed point DSP core. This core operates MOVE, BRANCH,

INTERRUPT, ADDRESSING and ARITHMETIC operations.

CLKGM : Clock Generation Module

This module generates internal and external clock. two type of clocks are generated external

clocks and clock from external crystal oscillator.

ADIF

: Audio Interface Module

This module is an interface of input/output serial audio data to external.

• 2-channels of input port, and 3-channel of output port.

• 2-audio data input registers and 6-output registers ( 20-bit ).

HSTIF

: Host Interface Module

This module transfers asynchronous serial data to host CPU, which has input data register and

output data register(20-bit).

GP

: General Port Module

This module has a 8-bit direction register and 8-bit data register. Each port is independent as

a 1pin input/output general port(total 8pins).

EXMIF

: External Memory Interface Module

This module reads and writes data to external memory(SRAM), which has 3-byte data read/

write mode and 1word(20bit) data read/write mode.

This module uses in-service-register in order to read and write 3-byte data.

EMUIF : Emulator Interface Module

This module is used for in circuit emulation.

LOG

: LOG Module

This module has registers to refer to table data for the operation of logarithmic functions.

MEM

: Memory Module

This module restores data and programs.

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