PD6710 datasheet(79/138 Pages) INTEL

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

Datasheet

Bit 2 — LED Activity Enable

This bit allows the LED_OUT* pin to reflect any activity in the card. Whenever PC Card cycles are

in process to or from a card in either socket, LED_OUT* will be active (low).

Bit 5 — Pull-up Control

This bit turns off the pull-ups on CD2, CD1, and A_GPSTB and B_GPSTB (PD6722). Turning off

these pull-ups can be used in addition to Suspend mode to even further reduce power when cards

are inserted but no card accessibility is required. Even though power may or may not still be

applied, all pull-ups and their associated inputs will be disabled.

Bit 7:6 — DMA Enable (PD6722 only)

On the PD6722, DMA Enable bits 6 and 7 enable the DMA operation of the PC Card socket. At

reset these bits are set to ‘0’, and this is non-DMA mode. If either or both of these bits is set, the

socket is in DMA mode. The three codes that cause DMA mode also select the use of one of three

pins for the active-low -DREQ input at the PC Card interface.

For cards requiring DMA services but also needing input acknowledge functionality, or needing to

indicate the size of I/O registers within a window, or needing digital speaker or LED operation, the

selection of the -DREQ signal to the socket is made to be as flexible as possible.

10.7.3

Maximum DMA Acknowledge Delay (PD6722 only)

LED activity disabled.

LED activity enabled.

Pull-ups on CD2, CD1, A_GPSTB, and B_GPSTB (PD6722) are in use.

Pull-ups on CD2, CD1, A_GPSTB, and B_GPSTB (PD6722) are turned off.

Bit 7

Bit 6

Pin Used

-INPACK

WP/-IOIS16

BVD2/-SPKR

Acknowledge Delay

Index: 2Fh

Extended Index: 04h

Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0

Maximum DMA Acknowledge Delay

RW:00000000

PD6710 Datasheet(PDF) 79 Page - Intel Corporation