VSC8504-02 datasheet(57/131 Pages) MICROSEMI

57 / 131 page

Registers

VMDS-10507 VSC8504-02 Datasheet Revision 4.2

4.2.2

Mode Status

The register at address 1 in the device main registers space allows you to read the currently enabled

mode setting. The following table shows possible readouts of this register.

Unidirectional enable

R/W

When bit 0.12 = 1 or bit 0.8 = 0, this bit is

ignored. When bit 0.12 = 0 and bit 0.8 = 1, the

behavior is as follows:

1: Enable transmit from media independent

interface regardless of whether the PHY has

determined that a valid link has been

established.

0: Enable transmit from media independent

interface only when the PHY has determined

that a valid link has been established.

Note: This bit is only applicable in

100BASE-FX and 1000BASE-X

fiber media modes.

4:0 Reserved

Reserved.

00000

Before selecting the 1000 Mbps forced speed mode, manually configure the PHY as master or slave by

setting bit 11 in register 9 (1000BASE-T Control). Each time the link drops, the PHY needs to be powered

down manually to enable it to link up again using the master/slave setting specified in register 9.11.

Table 19 •

Mode Status, Address 1 (0x01)

Bit Name

Access Description

Default

100BASE-T4 capability

1: 100BASE-T4 capable.

100BASE-TX FDX capability RO

1: 100BASE-TX FDX capable.

100BASE-TX HDX capability RO

1: 100BASE-TX HDX capable.

10BASE-T FDX capability

1: 10BASE-T FDX capable.

10BASE-T HDX capability

1: 10BASE-T HDX capable.

100BASE-T2 FDX capability RO

1: 100BASE-T2 FDX capable.

100BASE-T2 HDX capability RO

1: 100BASE-T2 HDX capable.

Extended status enable

1: Extended status information present in

Unidirectional ability

1: PHY able to transmit from media

independent interface regardless of

whether the PHY has determined that a

valid link has been established.

0: PHY able to transmit from media

independent interface only when the PHY

has determined that a valid link has been

established.

Note: This bit is only applicable to

100BASE-FX and

1000BASE-X fiber media

modes.

Preamble suppression

capability

1: MF preamble can be suppressed.

0: MF required.

Table 18 •

Mode Control, Address 0 (0x00) (continued)

Bit Name

Access Description

Default

VSC8504-02 데이터시트(PDF) 57 Page - Microsemi Corporation

VSC8504-02 데이터시트(HTML) 57 Page - Microsemi Corporation

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

데이터시트 다운로드

링크 URL