Read Sony NW-E002 / NW-E002F / NW-E003 / NW-E003F / NW-E005 / NW-E005F Service Manual online
Copying is strictly prohibited
5
1-2. Data Bus Interfaces
Fig.1-2 shows Data Bus Interfaces of the unit. In the unit, System Controller IC101 controls all the data bus interfaces.
Data Bus -1
Data Bus -1
System Controller IC101 constructs the bus interface with NOR FLASH MEMORY & SRAM IC201, using a 16-bit width data line and 21-bit width address line.
System Controller IC101 constructs the bus interface with OEL Module, using a 8-bit width data line.
Data Bus -2
System Controller IC101 constructs the bus interface with NAND FLASH MEMORY IC1301, using a 8-bit width data line.
The functions of ICs are as follows.
NOR FLASH MEMORY & SRAM IC201
NOR FLASH MEMORY IC201 has 32[M-bit] NOR FLASH MEMORY and 4[M-bit] SRAM internally.
Main program (Firmware) for the unit is stored in built-in NOR FLASH MEMORY.
Built-in SRAM is used for the Working Buffer of the music data.
Built-in SRAM is used for the Working Buffer of the music data.
NAND FLASH MEMORY IC1301 (NW-E002/E002F: 512MB, NW-E003/E003F: 1GB. NW-E005/E005F: 2GB)
NAND FLASH MEMORY is used for the following applications.
Music data such as ATRAC, MP3 and WMA transferred from PC is stored. (Music data is encrypted.)
PC data is stored via the application software like Windows Explorer.
System settings such as Volume and Play Mode set by customers are stored.
PC data is stored via the application software like Windows Explorer.
System settings such as Volume and Play Mode set by customers are stored.
System Controller IC101
System Controller IC101 is used for the following applications.
Control a whole system.
Decoding of the encrypted music data
Data communication with PC
Data Read/Write Control of NAND FLASH MEMORY IC1301
Control serial interfaces
Control charging (ON / OFF)
Decoding of the encrypted music data
Data communication with PC
Data Read/Write Control of NAND FLASH MEMORY IC1301
Control serial interfaces
Control charging (ON / OFF)
Click on the first or last page to see other NW-E002 / NW-E002F / NW-E003 / NW-E003F / NW-E005 / NW-E005F service manuals if exist.