CL-PD6722 datasheet(28/128 Pages) CIRRUS

28 / 128 page

PRELIMINARY DATA SHEET v3.1

CL-PD6710/’22

ISA–to–PC-Card Host Adapters

May 1997

INTRODUCTION

a IOR*, IOW*, MEMR*, and MEMW* must be held high when PWRGOOD is low to prevent manufacturing test mode outputs

from driving the system data bus.

Table 3-1.

CL-PD67XX Power-Management Modes

Mode Name

PWRGOOD

Level

AEN

Misc Control 2 Register

Functionality

Typical Power

Consumption

(CORE_VDD =

3.3 V,

ISA_VCC,

SOCKET_VCC,

and +5V = 5.0 V)

Suspend

Mode

(Bit 2)

Low-Power

Dynamic

Mode

(Bit 1)

Low-Power

Dynamic

(Default)

High

Normal

Full functionality

< 45 mW high activity,

9–14 mW normal

system activity

Normal

High

Normal

Full functionality

< 85 mW high activity,

18 mW normal sys-

tem activity

Suspend

(Software

Controlled)

High

Normal

–

8-bit access to Misc

Control 2 register.

No other register

access. No card in

socket(s).

< 2 mW

Super-Suspend

(Hardware

Controlled)

High

Static

High

1–

No register access.

No card in socket(s).

System bus signals

disabled (clock off).

< 1 mW

Reset

Lowa

––

–

No register access.

No card in socket(s).

System bus signals

disabled.

9–14 mW

3.1.9

Socket Power Management Features

Card Removal

When a card is removed from a socket, the

CL-PD67XX by default automatically disables the

VCC and VPP supplies to the socket. If Extension

Control 1 register bit 1 is ‘0’, card power is pre-

vented from being automatically disabled when a

card is removed. The CL-PD67XX can also be con-

ﬁgured to have management interrupts notify soft-

ware of card removal.

Card Insertion

Power to the socket is off at reset and whenever

there is no card in a socket. When a card is detected

(card detect input pins, -CD1 and -CD2, to the

CL-PD67XX become asserted low), two indepen-

dent actions can be programmed to occur.

If the CL-PD67XX has been set for automatic

power-on (Power Control register bits 4 and 5 are

both ‘1’), the CL-PD67XX automatically enables the

socket VCC supply (and, if so programmed, the VPP

supply).

If the CL-PD67XX has been programmed to cause

management interrupts for card-detection events,

assertion of -CD1 and -CD2 to the CL-PD67XX

causes a management interrupt to inform system

software that a card was inserted. In the case of

manual power detection (Power Control register bit

5 is ‘0’), system software can determine the card’s

operating voltage range and then power-up the

socket and initialize the card (or simply initialize the

card if programmed for automatic power-on (Power

Control register bit 5 is ‘1’ and Extension Control

1 register bit 1 is ‘1’)).

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