© SAMSUNG Electronics Co., Ltd.
12
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Package: 54P, TSOP
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Bus Bandwidth: 16 bits(Interfaces with CPU through 32-bit bus)
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All main programs required for system operation are loaded on SDRAM.
•
SDRAM is also used as a space for processing all data used for program processing.
•
SDRAM is addressed in multiplexing mode, which is controlled by internal registers
of the CPU.
•
A common address/data bus is shared with the CPU.
•
No Wait is used for SDRAM access.
NAND Flash Memory
The NAND(Not AND) Flash Memory stores system programs and various DB(Database)
data, and operates through 8-bit bus interface by default, but can also support 16-bit
interface.
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Device: SAMSUNG, K9F2808U0C-YCB0
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Memory Capacity: 16 Mbyte
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Quantity: 1
•
Socket: Not Used
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Package: 48P TSOP
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Bus Bandwidth: 8 bits(16 bits will be enabled in the future)
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Power: 3.3 V
Boot ROM
Boot ROM(Read Only Memory) stores booting program and DB data.
•
Device: AMD Am29LV040B-120JC
•
Memory Capacity: 512 KByte
•
Quantity: 1
•
Socket: Not used
•
Package: 32P PLCC
•
Bus Bandwidth: 8 bits
•
Boot ROM performs jobs related to system booting.
•
Upon system startup, the Boot ROM moves the program saved in Flash ROM to
SDRAM and starts the main program.
•
Boot ROM moves DB data required for system operation from the Flash ROM to
enable setting related parameters.
•
Wait Control is determined considering that the Access Time is 120ns, using the
internal DTACK method.
•
A common data bus is shared with the CPU.
Содержание OfficeServ 12
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