PD6710 datasheet(19/138 Pages) INTEL

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

Datasheet

SPKR_OUT*/

C_SEL

Speaker Out / Chip Select: This I/O pin can

be used as a digital output to a speaker to

allow a system to support a PC Card’s -

SPKR pin for fax/modem/voice and audio.

During reset this pin also serves as a chip-

configuration input.

If the level on this pin is low when

PWRGOOD rises, the PD6710 is configured

to support cards as a PC Card Socket 2

device, and the PD6722 is configured to

support cards as PC Card Socket 2 and

Socket 3 devices.

If the level on this pin is high when

PWRGOOD rises, the PD6710 is configured

to support cards as a PC Card Socket 0

device, and the PD6722 is configured to

support cards as PC Card Socket 0 and

Socket 1 devices.

This pin is internally pulled up during reset

so that default configuration of the chip as a

Socket 0 (and Socket 1 for PD6722) is

facilitated. Adhere to the minimum pulse-

width timing specification for PWRGOOD to

allow the internal pull-up to operate and

ensure the default configuration. Refer to

“Bit 6 — Socket Index” on page 41 for more

information on chip configuration.

After reset operations have completed, this

pin defaults to high-impedance, and can

then be enabled as a totem-pole speaker

output by the setting of a card socket’s

Speaker Enable bit (Misc Control 1

the negative polarity XOR of each socket’s

BVD2/-SPKR/-LED input that has its

Speaker Enable bit set. For a description of

socket index values, refer to Table 11.

142

202

I/O-

12 mA

CLK

Clock: This input is connected to the ISA

bus OSC signal. A 14.318-MHz signal is

used to derive the internal 25-MHz clock

used for all socket timing. Alternately, a 25-

MHz clock source can be directly connected

and the internal synthesizer bypassed.

102

163

–

-VPP_VALID

In default mode this is a status input that can

be used by software as an indication that the

VPP power supply is stable.

When the PD6722 is in DMA mode (see

Misc Control 2, bit 6), this input is connected

to the TC (Terminal Count) signal of the ISA

bus. In DMA mode, this signal is active-high.

–

ISA_VCC

System Bus VCC: This supply pin can be

set to 3.3 or 5.0 V. The ISA Bus Interface pin

group (this table) operates at the voltage

applied to this pin independent of the

voltage applied to other pin groups.

76, 135

138, 195

PWR

––

Table 1.

ISA Bus Interface Pins (Sheet 4 of 4)

Pin Name

Description

Pin Number

Qty.

I/O

Pwr.

Drive

PD6710

PD6722

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