CS5535 datasheet(265/555 Pages) NSC

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USB Register Descriptions (Continued)

5.5.1.3

GeodeLink Device SMI MSR (USBC_GLD_MSR_SMI)

SEL

Select.

0: Use field [18:16].

1: Use field [22:20].

18:16

FIX_PREFETCH

Fixed Read Prefetch Policy.

000: None. Each read takes a complete trip to memory.

001: Initial read 08 bytes. Read next 8 only when requested.

010: Initial read 16 bytes. Read next 16 only when requested.

011: Initial read 32 bytes. Read next 32 only when requested.

100: Initial read 32 bytes. Read next 32 when 16 bytes left.

101, 110, and 111: Reserved.

15:14

RSVD

Reserved. Read as written.

USB_LOPWR_EN

USB Low Power Enable. When 0, the transceiver is prevented from entering the low

power Suspend state. This bit has no functional impact on the transceiver or USB Con-

troller. Defaults to 1 (i.e., Suspend allowed).

USB_GLITCHFIX

_EN

USB Glitch Fix Enable: When 0, enable transceiver de-glitch logic. This logic sup-

presses a glitch that can occur when:

The transceiver moves from the suspend state to any other state.

and

A low speed device is connected. The state is defined by HcControl[7:6].

Defaults to 1 (i.e., no glitch suppression).

Note that this bit represents a deviation from the standard MSR_CONFIG register in

Section 3.8.2 "MSR Address 1: Master Configuration" on page 67.

11:0

RSVD

Reserved. Read as written.

MSR Address

USBC1: 51600002h

USBC2: 51200002h

Type

R/W

Reset Value

00000000_00000000h

USBC_GLD_MSR_CONFIG Bit Descriptions (Continued)

Bit

Name

Description

USBC_GLD_MSR_SMI 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

9876543210

RSVD

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