RB5C396 Ricoh Corporation, RB5C396 Datasheet - Page 22

• Manufacturer Part Number: RB5C396
• Description: PC Card Controller Compliant With Pcmcia 2.1/jeida 4.2
• Manufacturer: Ricoh Corporation

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FUNCTIONAL DESCRIPTION
standard. Direct connection to the card slot is allowed due to the complete buffering of signals to the card.
RF5C296/RF5C396 can also interface directly to the ISA bus.
1. Address Mapping
independently enabled and controlled system I/O address mapping windows.
into the smaller 16MB ISA address space.
64kB except for I/O address space of 0000h to 0FFFFh by setting the system memory mapping start register, sys-
tem memory mapping stop register, and card memory offset register. The summation result (in 2's complement) of
the value in the card memory offset register and ISA system address value will result in the memory card address.
memory area or attribute memory area.
RF5C296/RF5C396L/RB5C396/RF5C396
space by setting the I/O start address register and the I/O stop address register. I/O mapping is not allowed during
the DMA cycle.
RF5C296 (RF5C396) is a controller for supporting one (two) card slot compliant to PCMCIA2.1/JEIDA4.2 68pin
Each socket has five independently enabled and controlled system memory address mapping windows and two
Some portions of 64MB common memory and 64MB attribute memory spaces on the PC Cards can be mapped
Mapping of each system memory window can start and stop on any 4kB boundary of ISA system memory above
Each window has independent control of data bus size, the number of wait cycles, and the selection of common
Memory Map End Address
System Memory Window:
Memory Map Start Address
Each I/O window can be mapped with 1byte resolution between 0000h to 0FFFFh in the ISA system address
D000:FFFFh
D000:0000h
Address Space
ISA Memory
Memory Map Address
Offset=3F30XXXh
= –00D0000h(two's complement when negative offset)
Mapping
PCMCIA Socket Memory
Address Space
3FF FFFFh=64MB
Resulting PCMCIA
Socket Memory Window:
End Address
000 FFFFh
Start Address
000 0000h