PCI6421 datasheet(144/204 Pages) TI

144 / 204 page

6−8

6.6

Socket Power Management Register

This register provides power management control over the socket through a mechanism for slowing or stopping the

clock on the card interface when the card is idle. See Table 6−7 for a complete description of the register contents.

Bit

Name

Socket power management

Type

Default

Bit

Name

Socket power management

Type

Default

Socket power management

Offset:

CardBus Socket Address + 20h

Type:

Read-only, Read/Write

Default:

0000 0000h

Table 6−7. Socket Power Management Register Description

BIT

SIGNAL

TYPE

FUNCTION

31−26

RSVD

Reserved. These bits return 0s when read.

25 ‡

SKTACCES

Socket access status. This bit provides information on whether a socket access has occurred. This bit is

cleared by a read access.

0 = No PC Card access has occurred (default).

1 = PC Card has been accessed.

24 ‡

SKTMODE

Socket mode status. This bit provides clock mode information.

0 = Normal clock operation

1 = Clock frequency has changed.

23−17

RSVD

These bits return 0s when read.

CLKCTRLEN

CardBus clock control enable. This bit, when set, enables clock control according to bit 0 (CLKCTRL).

0 = Clock control disabled (default)

1 = Clock control enabled

15−1

RSVD

These bits return 0s when read.

CLKCTRL

CardBus clock control. This bit determines whether the CardBus CLKRUN protocol attempts to stop or

slow the CardBus clock during idle states. The CLKCTRLEN bit enables this bit.

0 = Allows the CardBus CLKRUN protocol to attempt to stop the CardBus clock (default)

1 = Allows the CardBus CLKRUN protocol to attempt to slow the CardBus clock by a factor of 16

‡ One or more bits in this register are cleared only by the assertion of GRST.

PCI6421 Datasheet(PDF) 144 Page - Texas Instruments

PCI6421 Datasheet(HTML) 144 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL