PCI1031 datasheet(79/100 Pages) TI

79 / 100 page

PCI1031

PCI-TO-PC CARD16 CONTROLLER UNIT

SCPS008B – FEBRUARY 1996 – REVISED DECEMBER 1997

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

socket present state register

Bit

Name

Socket present state

Type

Default

Bit

Name

Socket present state

Type

Default

Socket present state

Type:

Read only (see individual bit descriptions)

Offset:

CardBus socket address + 08h

Default:

3000 0006h

Size:

Four bytes

Description: This register reports information about the socket interface. Writes to the socket force event

overridden by the socket force event register), while information about PC Card VCC support

is dynamic and updated at each insertion. The PCI1031 uses CCD1 and CCD2 during card

identification, and changes on these signals during this operation are not reflected in

this register. Refer to Table 40 for a complete description of the register contents.

Table 40. Socket Present State Register

BIT

TYPE

FUNCTION

YVsocket. Bit 31 indicates whether or not the socket can supply VCC = Y.Y V to PC Cards. The PCI1031 does not support

Y.Y V VCC; therefore, bit 31 is always reset unless overridden by the socket force event register. Bit 31 is hardwired to 0.

XVsocket. Bit 30 indicates whether or not the socket can supply VCC = X.X V to PC Cards. The PCI1031 does not support

X.X V VCC; therefore, bit 30 is always reset unless overridden by the socket force event register. Bit 30 is hardwired to 0.

3Vsocket. Bit 29 indicates whether or not the socket can supply VCC = 3.3 V to PC Cards. The PCI1031 supports 3.3-V

VCC; therefore, bit 29 is always set unless overridden by the device control register. Bit 29 is encoded as:

0 = Socket cannot supply VCC = 3.3 V.

1 = Socket can supply VCC = 3.3 V (default).

5Vsocket. Bit 28 indicates whether or not the socket can supply VCC = 5.0 V to PC Cards. The PCI1031 supports 5.0-V

VCC; therefore, bit 28 is always set unless overridden by the device control register. Bit 28 is encoded as:

0 = Socket cannot supply VCC = 5.0 V.

1 = Socket can supply VCC = 5.0 V (default).

27–14

Reserved. Bits 27–14 are read only and return 0s when read. Writes have no effect.

YVCard. Bit 13 indicates whether or not the PC Card currently inserted in the socket supports VCC = Y.Y V. Bit 13 is

encoded as:

0 = PC Card does not function at VCC = Y.Y V (default).

1 = PC Card functions at VCC = Y.Y V.

XVCard. Bit 12 indicates whether or not the PC Card currently inserted in the socket supports VCC = X.X V. Bit 12 is

encoded as:

0 = PC Card does not function at VCC = X.X V (default).

1 = PC Card functions at VCC = X.X V.

3VCard. Bit 11 indicates whether or not the PC Card currently inserted in the socket supports VCC = 3.3 V. Bit 11 is encoded

as:

0 = PC Card does not function at VCC = 3.3 V (default).

1 = PC Card functions at VCC = 3.3 V.

PCI1031 Datasheet(PDF) 79 Page - Texas Instruments

PCI1031 Datasheet(HTML) 79 Page - Texas Instruments

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