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6
1-2. Data Bus Interfaces
Fig.1-2 shows Data Bus Interfaces of the unit.
Data Bus -1
Data Bus -1
MAIN SYSTEM CONTROLLER IC6005 constructs the bus interface with FLASH MEMORY IC7002, using a 16-bit width data line and 21-bit width address line.
MAIN SYSTEM CONTROLLER IC6005 constructs the bus interface with PLD IC8001, using an 8-bit width data line and 3-bit width address line.
MAIN SYSTEM CONTROLLER IC6005 constructs the bus interface with SD-RAM IC7001, using a 16-bit width data line and 14-bit width address line.
MAIN SYSTEM CONTROLLER IC6005 constructs the bus interface with USB CONTROLLER IC5001, using an 8-bit width data line and 8-bit width address line.
Data Bus -2
USB CONTROLLER IC5001 constructs the bus interface with HDD Drive, using a 16-bit width data line and 3-bit width address line.
The functions of ICs are as follows.
FLASH MEMORY IC7002 (4[MB])
FLASH MEMORY IC7002 has a main program (Firmware) for the unit.
Main System Controller IC6005
Main System Controller IC6005 is used for the following applications.
Control a whole system.
Transferring music data to PLD IC8001
Data communication with USB Controller IC5001
Data Read/Write Control of HDD
Transferring music data to PLD IC8001
Data communication with USB Controller IC5001
Data Read/Write Control of HDD
SD-RAM IC7001 (16[MB])
SD-RAM IC7001 is used for the working buffer of music data.
PLD IC8001
PLD IC8001 is used for the following applications.
Control serial communication shown in Fig.1-1.
Control HP AMP. IC3003.
ON/OFF Control of HDD
ON/OFF Control of G-Sensor Circuit
Control HP AMP. IC3003.
ON/OFF Control of HDD
ON/OFF Control of G-Sensor Circuit
HDD Drive (NW-A1000: 6[GB], NW-A1200: 8[GB], NW-A3000: 20[GB])
HDD is used for the following application.
Store the music data (ATRAC or MP3 or WMA) transferred from PC.
USB Controller IC5001
USB Controller IC5001 is used for the following applications.
USB communication to PC
HDD Control
HDD Control
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