PD6710 datasheet(28/138 Pages) INTEL

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PD6710/’22 — ISA-to-PC-Card (PCMCIA) Controllers

Datasheet

Having five memory windows per socket allows a memory-type card to be accessed through four

memory windows programmed for common memory access (allowing PC-type expanded-

memory-style management), leaving the fifth memory window available to be programmed to

access the card’s attribute memory without disrupting the common memory in use.

Each of the five memory windows has several programming options, including:

Each of the two I/O windows has several programming options, including:

Caution:

The windows of the PD67XX should never be allowed to overlap with each other or the other

devices in the system. This would cause collisions in the IOCS16*, MEMCS16*, IOCHRDY, and

SD[15:0] signals, resulting in erratic behavior.

Memory

Window Option

Description

Enabled

Each of the five memory windows can be individually enabled. Disabled windows are not responded to.

Start Address

The starting address of the window is programmable on 4-Kbyte boundaries starting at 64 Kbytes

(1000h) with a maximum address of 16 Mbyte.

End Address

The ending address of the window is programmable on 4-Kbyte boundaries starting at 64 Kbytes

(1000h) with a maximum address of 16 Mbyte. Only memory accesses between the starting and ending

address are responded to.

Offset Address

The offset address is added to the ISA address to determine the address for accessing the PC Card.

This allows the addresses in the PC Card address space to be different from the ISA address space.

Data Size

The size of accesses can be set manually to either 8 or 16 bits.

Timing

The timing of accesses (Setup/Command/Recovery) can be set by either of two timing register sets:

Timer Set 0 or Timer Set 1.

Setting

The -REG pin can be enabled on a per-window basis so that any of the windows can be used for

accessing attribute memory.

Write Protect

If the window is programmed to be write-protected, then writes to the memory window are ignored (reads

are still performed normally).

I/O

Window Option

Description

Enabled

Each of the two I/O windows can be individually enabled.

Start Address

The starting address of the window is programmable on single-byte boundaries from 0 to 64 Kbytes.

End Address

The ending address of the window is also programmable on single-byte boundaries from 0 to 64 Kbytes.

Offset Address

The offset address is added to the ISA address to determine the address for accessing the PC Card.

Auto Size

The size of accesses can be set automatically, based on the PC Card -IOIS16 signal.

Data Size

The size of accesses can be set manually to either 8 or 16 bits, overriding the Auto Size option.

Timing

The timing of accesses (Setup/Command/Recovery) can be set by either of two timing register sets:

Timer Set 0 or Timer Set 1.

PD6710 Datasheet(PDF) 28 Page - Intel Corporation

PD6710 Datasheet(HTML) 28 Page - Intel Corporation

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