ch7304 Chrontel, ch7304 Datasheet - Page 23

• Manufacturer Part Number: ch7304
• Description: Ch7304 Single Channel Lvds Transmitter
• Manufacturer: Chrontel

CHRONTEL
LVDS Output Driver Amplitude control
LODA[2:0] (bits 2-0) of Register LODA controls the Output Driver Amplitude. See Table 12.
LODPE (bit 6) of Register LODA controls LVDS Output Driver Pre-Emphasis for both LDC[7:4] and LDC[3:0] by
simultaneous Pull-up and Pull-down diode currents.
LODP (bit 7) of Register LODA activates the LVDS Outputs Driver Pull-Down during power-down.
LVDS Source Termination
LODST (bit 7) of Register LST controls the LVDS Output Drive Source Termination.
201-0000-053
DEFAULT:
DEFAULT:
SYMBOL:
SYMBOL:
LODPE
LODP
LODST
TYPE:
TYPE:
BIT:
BIT:
Table 12: LVDS Output Driver Amplitude
LODST
= 0 =>
= 1 =>
= 0 =>
= 1 =>
= 0 =>
= 1 =>
LODA2
LODP
R/W
R/W
Rev. 1.31, 6/14/2006
1
0
7
0
0
0
0
1
1
1
1
7
Pull up reduced by 33% and pull down reduced by 66%.
Default value
Pull-down devices not active
Pull-down devices active
100Ω shunt disabled between LVDS outputs LDCx and LDCx*, also LLC and LLC*
100Ω shunt enabled between LVDS outputs LDCx and LDCx*, also LLC and LLC*
Reserved Reserved Reserved Reserved Reserved Reserved Reserved
LODPE
LODA1
R/W
R/W
6
1
6
0
0
0
1
1
0
0
1
1
Reserved
LODA0
R/W
R/W
5
0
5
0
0
1
0
1
0
1
0
1
Output Driver Amplitude (mV)
Reserved
R/W
R/W
4
0
4
0
Reserved
305
285
265
245
225
410
370
330
R/W
R/W
3
0
3
0
Symbol:
Address:
Symbol:
Address:
LODA2
R/W
R/W
2
0
2
0
LODA1
R/W
R/W
LODA
74h
LST
75h
1
0
1
0
CH7304
LODA0
R/W
R/W
0
0
0
0
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