Texas Instruments DS100MB203EVK, Руководство пользователя, Страница: 4 / 13

4 DS100MB203EVK User’s Guide October 2012
Table 3: 16 EQ settings when in pin mode
Level EQ_S[1:0]
EQ_D[1:0] SW1 – EQ_S[1:0]
SW8 – EQ_D[1:0] EQ (dB) at
4 GHz
EQ (dB) at
5 GHz
6 5 4 3 2 1
1 0, 0 ON OFF OFF ON OFF OFF 4.9 5.3
2 0, R ON OFF OFF OFF ON OFF 7.9 8.7
3 0, F
ON
OFF OFF OFF OFF OFF 9.9 10.6
4 0, 1
ON
OFF OFF OFF OFF
ON
11.0 11.7
5 R, 0 OFF ON OFF ON OFF OFF 14.3 15.6
6 R, R OFF ON OFF OFF ON OFF 14.6 16.6
7 R, F OFF
ON
OFF OFF OFF OFF 17.0 18.3
8 R ,1 OFF ON OFF OFF OFF ON 18.5 19.7
9 F ,0 OFF OFF OFF ON OFF OFF 18.0 20.3
10 F, R OFF OFF OFF OFF
ON
OFF 22.0 23.6
11 F, F OFF OFF OFF OFF OFF OFF 24.4 25.8
12 F, 1 OFF OFF OFF OFF OFF ON 25.8 27
13 1, 0 OFF OFF ON ON OFF OFF 27.4 29.1
14 1, R OFF OFF
ON
OFF
ON
OFF 29.0 30.7
15 1, F OFF OFF ON OFF OFF OFF 31.4 32.7
16 1, 1 OFF OFF ON OFF OFF ON 32.7 33.8
2.6. Set the output VOD and De-emphasis level.
For external pin mode control for the VOD and De-emphasis level:
Set ENSMB = 0 (1kohm to GND) by using the SW2 (3-2-1) = ( ON -OFF-OFF).
SW4 pin1,2 must be set to the OFF positions, so the SMBUS signals are disconnected.
Refer to Table 1 for information on the 3 switch settings for the 4 level input.
Example:
Set DEM_S[1:0] with SW3 for the S outputs (S_OUTA0, S_OUTB0, S_OUTA1, S_OUTB1).
SW5 (6-5-4), (3-2-1) = (OFF- ON -OFF), (OFF-OFF-OFF) = DEM_D[1:0] = R,F (VOD=1.0V, DE=0 dB).
Set DEM_D[1:0] with SW5 for the D of outputs (D_OUT0, D_OUT1).
SW3 (6-5-4), (3-2-1) = (OFF- ON -OFF), (OFF-OFF-OFF) = DEM_S1:0] = R,F (VOD=1.0V, DE=0 dB).
Table 4: 16 settings of VOD and DE when in pin mode
Level DEM_S[1:0]
DEM_D[1:0]
SW3 – DEM_S[1:0]
SW5 – DEM_D[1:0]
6 5 4 3 2 1 VOD (Vp-p) DE (dB)
1 0, 0
ON
OFF OFF
ON
OFF OFF 0.6 0
2 0, R ON OFF OFF OFF ON OFF 0.8 0
3 0, F ON OFF OFF OFF OFF OFF 0.8 -3.5
4 0, 1
ON
OFF OFF OFF OFF
ON
0.9 0
5 R, 0 OFF ON OFF ON OFF OFF 0.9 -3.5
6 R, R OFF ON OFF OFF ON OFF 0.9 -6
7 R, F OFF ON OFF OFF OFF OFF 1 0
8 R ,1 OFF
ON
OFF OFF OFF
ON
1 -3.5
9 F ,0 OFF OFF OFF ON OFF OFF 1 -6
10 F, R OFF OFF OFF OFF ON OFF 1.1 0
11 F, F OFF OFF OFF OFF OFF OFF 1.1 -3.5
12 F, 1 OFF OFF OFF OFF OFF
ON
1.1 -6
13 1, 0 OFF OFF ON ON OFF OFF 1.2 0
14 1, R OFF OFF ON OFF ON OFF 1.2 -3.5
15 1, F OFF OFF
ON
OFF OFF OFF 1.2 -6
16 1, 1 OFF OFF
ON
OFF OFF
ON
1.2 -9