DS42MB200

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SNOSAT8G – JANUARY 2006 – REVISED APRIL 2013

Table 1. LOGIC TABLE FOR MULTIPLEX CONTROLS

MUX_S0

Mux Function

0

MUX_0 select switch_B input, SIB_0±.

1 (default)

MUX_0 select switch_A input, SIA_0±.

MUX_S1

Mux Function

0

MUX_1 select switch_B input, SIB_1±.

1 (default)

MUX_1 select switch_A input, SIA_0±.

Table 2. LOGIC TABLE FOR LOOPBACK Controls

LB0A

Loopback Function

0

Enable loopback from SIA_0± to SOA_0±.

1 (default)

Normal mode. Loopback disabled.

LB0B

Loopback Function

0

Enable loopback from SIB_0± to SOB_0±.

1 (default)

Normal mode. Loopback disabled.

LB1A

Loopback Function

0

Enable loopback from SIA_1± to SOA_1±.

1 (default)

Normal mode. Loopback disabled.

LB1B

Loopback Function

0

Enable loopback from SIB_1± to SOB_1±.

1 (default)

Normal mode. Loopback disabled.

Table 3. LINE-SIDE PRE-EMPHASIS CONTROLS

De-Emphasis Level in

Pre-Emphasis Level in mVPP

Pre-Emphasis in dB

Typical FR4 board

PreL_[1:0]

mVPP

(VODB)

(VODPE/VODB)

trace

(VODPE)

0 0

1200

1200

0

10 inches

0 1

1200

850

−3

20 inches

1 0

1200

600

−6

30 inches

1 1

1200

426

−9

40 inches

(default)

Table 4. SWITCH-SIDE PRE-EMPHASIS CONTROLS

De-Emphasis Level in

Pre-Emphasis Level in mVPP

Pre-Emphasis in dB

Typical FR4 board

PreS_[1:0]

mVPP

(VODB)

(VODPE/VODB)

trace

(VODPE)

0 0

1200

1200

0

10 inches

0 1

1200

850

−3

20 inches

1 0

1200

600

−6

30 inches

1 1

1200

426

−9

40 inches

(default)

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