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參數(shù)資料
| 型號： | RB5C396 |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | 總線控制器 |
| 英文描述： | PC Card Controller compliant with PCMCIA 2.1/JEIDA 4.2 |
| 中文描述： | PCMCIA BUS CONTROLLER, PBGA256 |
| 封裝： | 23 X 23 MM, PLASTIC, BGA-256 |
| 文件頁數(shù)： | 62/93頁 |
| 文件大?。?/td> | 449K |
| 代理商： | RB5C396 |
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RF5C296/RF5C396L/RB5C396/RF5C396
58
Particularly, on the PC card bus, there are two types of memory available : the common memory and the
attribute memory, which can be selected by the Card Memory Offset Address n High/Low Byte Registers.
The common memory and the attribute memory are used mainly for ordinary access and for storage of such data
as PC card information, respectively. During access to the attribute memory, the REG# pin signal is held at “L”.
The RF5C296 and RF5C396 provide memory address mapping as shown in the figure below :
In the above figure, addresses “(aaa000)h” and “(ccc000)h” can be set in the System Memory Address n
Mapping Start High/Low Byte Registers, addresses “(bbbFFF)h” and “(dddFFF)h” in the System Memory Address
n Mapping Stop High/Low Byte Registers, and addresses “(pppp000)h” and “(qqqq000)h” in the Card Memory
Offset Address n High/Low Byte Registers.
Memory addresses on ISA bus
Memory addresses
(in common memory) on PC card bus
Memory addresses
(in attribute memory) on PC card bus
000000 h
(aaa000)h
(bbbFFF)h
(ccc000)h
(dddFFF)h
FFFFFF h
MEMORY
WINDOW 0
MEMORY
WINDOW n
16MB memory address space
000000h
+(ccc000)h
or
or
(pppp000)h
+(bbbFFF)h
3FFFFFFh
·
·
·
·
·
·
·
·
·
+(aaa000)h
(pppp000)h
+(ddd000)h
(qqqq000)h
(qqqq000)h
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