ACS8520 View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'ACS8520' PDF : 150 Pages View PDF
ACS8520 SETS
ADVANCED COMMUNICATIONS
Address (hex): 35 (cont...)
Register Name cnfg_T4_path
FINAL
DATASHEET
Description
Register to configure the inputs Default Value 0100 0000
and other features in the T4 path.
Bit 7
Bit 6
lock_T4_to_T0 T4_dig_feed-
back
Bit 5
Bit 4
T4_op_from_T0
Bit 3
Bit 2
Bit 1
T4_forced_reference_source
Bit 0
Bit No.
Description
Bit Value Value Description
[3:0]
T4_forced_reference_source
This field can be used to force the T4 DPLL to select
a particular input. A value of zero in this field allows
the T4 input to be selected automatically via the
priority and input monitoring functions.
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
T4 DPLL automatic source selection.
T4 DPLL forced to select input I1.
T4 DPLL forced to select input I2.
T4 DPLL forced to select input I3.
T4 DPLL forced to select input I4.
T4 DPLL forced to select input I5.
T4 DPLL forced to select input I6.
T4 DPLL forced to select input I7.
T4 DPLL forced to select input I8.
T4 DPLL forced to select input I9.
T4 DPLL forced to select input I10.
T4 DPLL forced to select input I11.
T4 DPLL forced to select input I12.
T4 DPLL forced to select input I13.
T4 DPLL forced to select input I14.
Not used.
Address (hex): 36
Register Name cnfg_differential_inputs
Description
(R/W) Configures the differential Default Value
inputs to be PECL or LVDS type
inputs.
0000 0010
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
I6_PECL
Bit 0
I5_LVDS
Bit No.
Description
Bit Value Value Description
[7:2]
1
0
Not used.
I6_PECL
Configures the I6 input to be compatible with either
3 V LVDS or 3 V PECL electrical levels.
I5_LVDS
Configures the I5 input to be compatible with either
3 V LVDS or 3 V PECL electrical levels.
-
-
0
I6 input LVDS compatible.
1
I6 input PECL compatible (Default).
0
I5 input LVDS compatible (Default).
1
I5 input PECL compatible.
Revision 3.02/October 2005 © Semtech Corp.
Page 85
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