CS5535 datasheet(269/555 Pages) NSC

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USB Register Descriptions (Continued)

5.5.1.6

GeodeLink Device Diagnostic MSR (USBC_GLD_MSR_DIAG)

This register is reserved for internal use by National and should not be written to.

5.5.2

USB Specific MSRs

5.5.2.1

USB Transceiver Control (USBC_XCVR_CNTRL)

3:2

PMODE1

Power Mode 1. Controls clock behavior for the USB PCI Adapter

00: Disable clock gating. Clocks are always on.

01: Enable active hardware clock gating. Clock goes off whenever this module’s circuits

are not busy.

10: Reserved.

11: Reserved.

1:0

PMODE0

Power Mode 0. Controls clock behavior for the USB GeodeLink Adapter

00: Disable clock gating. Clocks are always on.

01: Enable active hardware clock gating. Clock goes off whenever this module’s circuits

are not busy.

10: Reserved.

11: Reserved.

MSR Address

USBC1: 51600005h

USBC2: 51200005h

Type

R/W

Reset Value

00000000_00000000h

MSR Address

USBC1: 51600008h

USBC2: 51200008h

Type

R/W

Reset Value

00000000_00020100h

USBC_GLD_MSR_PM Bit Descriptions

Bit

Name

Description

USBC_XCVR_CNTRL Register Map

63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32

RSVD

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10

RSVD

RCVR2

_VADJ

XMIT2_CADJ

RCVR1

_VADJ

XMIT1_CADJ

USBC_XCVR Bit Description

Bit

Name

Description

63:18

RSVD

Reserved. Read as 0.

XCEIV2_PM

Transceiver 2 Power Management Bit. Disables transceiver #2 and puts the trans-

ceiver in a low power state.

0: Enable transceiver.

1: Disable transceiver.

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